boards/arm/stm32h7: add support for stm32h750b-dk board

Support for development using STM32H750B-DK, including configuration of onboard memory, flash, etc., and configuration of LVGL runtime environment has been added. Signed-off-by: liujp <liujp@xiaomi.com>
2026-05-24 07:46:16 +08:00 · 2025-04-03 13:02:31 +08:00
parent 0a74293f11
commit c309c452d6
23 changed files with 3366 additions and 0 deletions
@@ -0,0 +1,21 @@
+# ##############################################################################
+# boards/arm/stm32h7/stm32h750b-dk/CMakeLists.txt
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+add_subdirectory(src)
@@ -0,0 +1,8 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_STM32H750B_DK
+
+endif # ARCH_BOARD_STM32H750B_DK
@@ -0,0 +1,86 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_STANDARD_SERIAL is not set
+# CONFIG_STM32H7_CORTEXM4_ENABLED is not set
+# CONFIG_STM32H7_FB_CMAP is not set
+# CONFIG_STM32H7_LTDC_L1_CHROMAKEYEN is not set
+# CONFIG_STM32H7_LTDC_L2 is not set
+# CONFIG_STM32H7_USE_LEGACY_PINMAP is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="stm32h750b-dk"
+CONFIG_ARCH_BOARD_STM32H750B_DK=y
+CONFIG_ARCH_CHIP="stm32h7"
+CONFIG_ARCH_CHIP_STM32H750B=y
+CONFIG_ARCH_CHIP_STM32H7=y
+CONFIG_ARCH_CHIP_STM32H7_CORTEXM7=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARMV7M_DCACHE=y
+CONFIG_ARMV7M_DCACHE_WRITETHROUGH=y
+CONFIG_ARMV7M_DTCM=y
+CONFIG_ARMV7M_ICACHE=y
+CONFIG_ARM_MPU=y
+CONFIG_BOARD_LOOPSPERMSEC=43103
+CONFIG_BUILTIN=y
+CONFIG_DEV_URANDOM=y
+CONFIG_DRIVERS_VIDEO=y
+CONFIG_EXAMPLES_FB=y
+CONFIG_EXAMPLES_LVGLDEMO=y
+CONFIG_EXAMPLES_TOUCHSCREEN=y
+CONFIG_FS_PROCFS=y
+CONFIG_FT5X06_NPOLLWAITERS=8
+CONFIG_FT5X06_POLLMODE=y
+CONFIG_FT5X06_SINGLEPOINT=y
+CONFIG_FT5X06_SWAPXY=y
+CONFIG_FT5X06_THRESHX=9
+CONFIG_FT5X06_THRESHY=15
+CONFIG_GRAPHICS_LVGL=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INPUT=y
+CONFIG_INPUT_FT5X06=y
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LINE_MAX=64
+CONFIG_LV_USE_CLIB_MALLOC=y
+CONFIG_LV_USE_CLIB_SPRINTF=y
+CONFIG_LV_USE_CLIB_STRING=y
+CONFIG_LV_USE_DEMO_WIDGETS=y
+CONFIG_LV_USE_LOG=y
+CONFIG_LV_USE_NUTTX=y
+CONFIG_LV_USE_NUTTX_TOUCHSCREEN=y
+CONFIG_MM_HEAP_MEMPOOL_THRESHOLD=0
+CONFIG_MM_REGIONS=6
+CONFIG_MQ_MAXMSGSIZE=256
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_DISABLE_IFUPDOWN=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=245760
+CONFIG_RAM_START=0x20010000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SERIAL_TERMIOS=y
+CONFIG_SIG_DEFAULT=y
+CONFIG_START_DAY=6
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2011
+CONFIG_STM32H7_DMA1=y
+CONFIG_STM32H7_DMA2=y
+CONFIG_STM32H7_FMC=y
+CONFIG_STM32H7_I2C4=y
+CONFIG_STM32H7_LTDC=y
+CONFIG_STM32H7_LTDC_FB_BASE=0xd0000000
+CONFIG_STM32H7_LTDC_FB_SIZE=522240
+CONFIG_STM32H7_PWR_DIRECT_SMPS_SUPPLY=y
+CONFIG_STM32H7_USART3=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TTY_SIGINT=y
+CONFIG_USART3_SERIAL_CONSOLE=y
+CONFIG_VIDEO_FB=y
@@ -0,0 +1,44 @@
+############################################################################
+# boards/arm/stm32h7/stm32h750b-dk/scripts/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/.config
+include $(TOPDIR)/tools/Config.mk
+include $(TOPDIR)/arch/arm/src/armv7-m/Toolchain.defs
+
+ifeq ($(CONFIG_ARCH_CHIP_STM32H7_CORTEXM7),y)
+  LDSCRIPT = flash.ld
+else
+  LDSCRIPT = flash_m4.ld
+endif
+
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
@@ -0,0 +1,230 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/scripts/flash.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/* The STM32H745ZI has 2048Kb of main FLASH memory. The flash memory is
+ * partitioned into a User Flash memory and a System Flash memory. Each
+ * of these memories has two banks:
+ *
+ *   1) User Flash memory:
+ *
+ *      Bank 1: Start address 0x0800:0000 to 0x080F:FFFF with 8 sectors, 128Kb each
+ *      Bank 2: Start address 0x0810:0000 to 0x081F:FFFF with 8 sectors, 128Kb each
+ *
+ *   2) System Flash memory:
+ *
+ *      Bank 1: Start address 0x1FF0:0000 to 0x1FF1:FFFF with 1 x 128Kb sector
+ *      Bank 1: Start address 0x1FF4:0000 to 0x1FF5:FFFF with 1 x 128Kb sector
+ *
+ *   3) User option bytes for user configuration, only in Bank 1.
+ *
+ * In the STM32H745ZI, two different boot spaces can be selected through
+ * the BOOT pin and the boot base address programmed in the BOOT_ADD0 and
+ * BOOT_ADD1 option bytes:
+ *
+ *   1) BOOT=0: Boot address defined by user option byte BOOT_ADD0[15:0].
+ *      ST programmed value: Flash memory at 0x0800:0000
+ *   2) BOOT=1: Boot address defined by user option byte BOOT_ADD1[15:0].
+ *      ST programmed value: System bootloader at 0x1FF0:0000
+ *
+ * TODO: Check next paragraph with nucleo schematics
+ *
+ * NuttX does not modify these option bytes. On the unmodified
+ * stm32h750b-dk board, the BOOT0 pin is at ground so by default, the
+ * STM32 will boot to address 0x0800:0000 in FLASH.
+ *
+ * The STM32H745ZI also has 1024Kb of data SRAM.
+ * SRAM is split up into several blocks and into three power domains:
+ *
+ *   1) TCM SRAMs are dedicated to the Cortex-M7 and are accessible with
+ *      0 wait states by the Cortex-M7 and by MDMA through AHBS slave bus
+ *
+ *      1.1) 128Kb of DTCM-RAM beginning at address 0x2000:0000
+ *
+ *           The DTCM-RAM is organized as 2 x 64Kb DTCM-RAMs on 2 x 32 bit
+ *           DTCM ports. The DTCM-RAM could be used for critical real-time
+ *           data, such as interrupt service routines or stack / heap memory.
+ *           Both DTCM-RAMs can be used in parallel (for load/store operations)
+ *           thanks to the Cortex-M7 dual issue capability.
+ *
+ *      1.2)  64Kb of ITCM-RAM beginning at address 0x0000:0000
+ *
+ *           This RAM is connected to ITCM 64-bit interface designed for
+ *           execution of critical real-times routines by the CPU.
+ *
+ *   2) AXI SRAM (D1 domain) accessible by all system masters except BDMA
+ *      through D1 domain AXI bus matrix
+ *
+ *      2.1) 512Kb of SRAM beginning at address 0x2400:0000
+ *
+ *   3) AHB SRAM (D2 domain) accessible by all system masters except BDMA
+ *      through D2 domain AHB bus matrix
+ *
+ *      3.1) 128Kb of SRAM1 beginning at address 0x3000:0000
+ *      3.2) 128Kb of SRAM2 beginning at address 0x3002:0000
+ *      3.3)  32Kb of SRAM3 beginning at address 0x3004:0000
+ *
+ *      SRAM1 - SRAM3 are one contiguous block: 288Kb at address 0x3000:0000
+ *
+ *   4) AHB SRAM (D3 domain) accessible by most of system masters
+ *      through D3 domain AHB bus matrix
+ *
+ *      4.1)  64Kb of SRAM4 beginning at address 0x3800:0000
+ *      4.1)   4Kb of backup RAM beginning at address 0x3880:0000
+ *
+ * When booting from FLASH, FLASH memory is aliased to address 0x0000:0000
+ * where the code expects to begin execution by jumping to the entry point in
+ * the 0x0800:0000 address range.
+ */
+
+#include <nuttx/config.h>
+
+#ifndef CONFIG_STM32H7_CORTEXM4_ENABLED
+MEMORY
+{
+  itcm  (rwx) : ORIGIN = 0x00000000, LENGTH =   64K
+  flash (rx)  : ORIGIN = 0x08000000, LENGTH = 2048K
+  dtcm1 (rwx) : ORIGIN = 0x20000000, LENGTH =   64K
+  dtcm2 (rwx) : ORIGIN = 0x20010000, LENGTH =   64K
+  sram  (rwx) : ORIGIN = 0x24000000, LENGTH =  512K
+  sram1 (rwx) : ORIGIN = 0x30000000, LENGTH =  128K
+  sram2 (rwx) : ORIGIN = 0x30020000, LENGTH =  128K
+  sram3 (rwx) : ORIGIN = 0x30040000, LENGTH =   32K
+  sram4 (rwx) : ORIGIN = 0x38000000, LENGTH =   64K
+  bbram (rwx) : ORIGIN = 0x38800000, LENGTH =    4K
+  sdram (rwx) : ORIGIN = 0xD0000000, LENGTH =   8M
+}
+#else
+MEMORY
+{
+  itcm  (rwx) : ORIGIN = 0x00000000, LENGTH = 64K
+  flash (rx)  : ORIGIN = 0x08000000, LENGTH = CONFIG_STM32H7_CORTEXM7_FLASH_SIZE
+  dtcm1 (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+  dtcm2 (rwx) : ORIGIN = 0x20010000, LENGTH = 64K
+  sram  (rwx) : ORIGIN = 0x24000000, LENGTH = 512K
+
+  /* shared memory on SRAM3 */
+
+  shmem (rwx) : ORIGIN = 0x30040000, LENGTH = 32K
+  sram4 (rwx) : ORIGIN = 0x38000000, LENGTH = 64K
+  bbram (rwx) : ORIGIN = 0x38800000, LENGTH = 4K
+}
+#endif
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+ENTRY(_stext)
+SECTIONS
+{
+    .text :
+    {
+        _stext = ABSOLUTE(.);
+        *(.vectors)
+        *(.text .text.*)
+        *(.fixup)
+        *(.gnu.warning)
+        *(.rodata .rodata.*)
+        *(.gnu.linkonce.t.*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.got)
+        *(.gcc_except_table)
+        *(.gnu.linkonce.r.*)
+        _etext = ABSOLUTE(.);
+    } > flash
+
+    .init_section :
+    {
+        _sinit = ABSOLUTE(.);
+        KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+        KEEP(*(.init_array EXCLUDE_FILE(*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o) .ctors))
+        _einit = ABSOLUTE(.);
+    } > flash
+
+    .ARM.extab :
+    {
+        *(.ARM.extab*)
+    } > flash
+
+    __exidx_start = ABSOLUTE(.);
+    .ARM.exidx :
+    {
+        *(.ARM.exidx*)
+    } > flash
+    __exidx_end = ABSOLUTE(.);
+
+    _eronly = ABSOLUTE(.);
+
+    .data :
+    {
+        _sdata = ABSOLUTE(.);
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        CONSTRUCTORS
+        . = ALIGN(4);
+        _edata = ABSOLUTE(.);
+    } > sram AT > flash
+
+    .bss :
+    {
+        _sbss = ABSOLUTE(.);
+        *(.bss .bss.*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON)
+        . = ALIGN(4);
+        _ebss = ABSOLUTE(.);
+    } > sram
+
+#ifdef CONFIG_STM32H7_CORTEXM4_ENABLED
+    .shmem :
+    {
+        . = ALIGN(4);
+        *(.shmem);
+        KEEP(*(.shmem))
+    } > shmem
+#endif
+
+    /* Emit the the D3 power domain section for locating BDMA data
+     *
+     * Static data with locate_data(".sram4") will be located
+     * at start of SRAM4; the rest of SRAM4 will be added to the heap.
+     */
+
+    .sram4_reserve (NOLOAD) :
+    {
+        *(.sram4)
+        . = ALIGN(4);
+        _sram4_heap_start = ABSOLUTE(.);
+    } > sram4
+
+    /* Stabs debugging sections. */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/scripts/flash_m4.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (theflash.ld
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#define STM32M4_FLASH_START (0x08000000 + CONFIG_STM32H7_CORTEXM7_FLASH_SIZE)
+
+#if CONFIG_STM32H7_CORTEXM7_FLASH_SIZE != 1048576
+#  error TODO: not supported yet - BCM4_ADD0 must be configured
+#endif
+
+/* Use 0x1xxxxxxx SRAM1-3 mapping for Cortex-M4 */
+
+MEMORY
+{
+  flash (rx)  :
+    ORIGIN = STM32M4_FLASH_START,
+    LENGTH = (2048K - CONFIG_STM32H7_CORTEXM7_FLASH_SIZE)
+
+  /* SRAM1 and SRAM2 */
+
+  sram  (rwx) : ORIGIN = 0x10000000, LENGTH = 128K + 128K
+
+  /* shared memory on SRAM3 */
+
+  shmem (rwx) : ORIGIN = 0x10040000, LENGTH = 32K
+}
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+ENTRY(_stext)
+SECTIONS
+{
+    .text :
+    {
+        _stext = ABSOLUTE(.);
+        *(.vectors)
+        *(.text .text.*)
+        *(.fixup)
+        *(.gnu.warning)
+        *(.rodata .rodata.*)
+        *(.gnu.linkonce.t.*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.got)
+        *(.gcc_except_table)
+        *(.gnu.linkonce.r.*)
+        _etext = ABSOLUTE(.);
+    } > flash
+
+    .init_section :
+    {
+        _sinit = ABSOLUTE(.);
+        *(.init_array .init_array.*)
+        _einit = ABSOLUTE(.);
+    } > flash
+
+    .ARM.extab :
+    {
+        *(.ARM.extab*)
+    } > flash
+
+    __exidx_start = ABSOLUTE(.);
+    .ARM.exidx :
+    {
+        *(.ARM.exidx*)
+    } > flash
+    __exidx_end = ABSOLUTE(.);
+
+    _eronly = ABSOLUTE(.);
+
+    .data :
+    {
+        _sdata = ABSOLUTE(.);
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        CONSTRUCTORS
+        . = ALIGN(4);
+        _edata = ABSOLUTE(.);
+    } > sram AT > flash
+
+    .bss :
+    {
+        _sbss = ABSOLUTE(.);
+        *(.bss .bss.*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON)
+        . = ALIGN(4);
+        _ebss = ABSOLUTE(.);
+    } > sram
+
+    /* Stabs debugging sections. */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
@@ -0,0 +1,126 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/scripts/gnu-elf.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+SECTIONS
+{
+  .text 0x00000000 :
+    {
+      _stext = . ;
+      *(.text)
+      *(.text.*)
+      *(.gnu.warning)
+      *(.stub)
+      *(.glue_7)
+      *(.glue_7t)
+      *(.jcr)
+
+      /* C++ support:  The .init and .fini sections contain specific logic
+       * to manage static constructors and destructors.
+       */
+
+      *(.gnu.linkonce.t.*)
+      *(.init)             /* Old ABI */
+      *(.fini)             /* Old ABI */
+      _etext = . ;
+    }
+
+  .ARM.extab :
+    {
+      *(.ARM.extab*)
+    }
+
+  .ARM.exidx :
+    {
+      *(.ARM.exidx*)
+    }
+
+  .rodata :
+    {
+      _srodata = . ;
+      *(.rodata)
+      *(.rodata1)
+      *(.rodata.*)
+      *(.gnu.linkonce.r*)
+      _erodata = . ;
+    }
+
+  .data :
+    {
+      _sdata = . ;
+      *(.data)
+      *(.data1)
+      *(.data.*)
+      *(.gnu.linkonce.d*)
+      . = ALIGN(4);
+      _edata = . ;
+    }
+
+  /* C++ support. For each global and static local C++ object,
+   * GCC creates a small subroutine to construct the object. Pointers
+   * to these routines (not the routines themselves) are stored as
+   * simple, linear arrays in the .ctors section of the object file.
+   * Similarly, pointers to global/static destructor routines are
+   * stored in .dtors.
+   */
+
+  .ctors :
+    {
+      _sctors = . ;
+      *(.ctors)       /* Old ABI:  Unallocated */
+      *(.init_array)  /* New ABI:  Allocated */
+      _edtors = . ;
+    }
+
+  .dtors :
+    {
+      _sdtors = . ;
+      *(.dtors)       /* Old ABI:  Unallocated */
+      *(.fini_array)  /* New ABI:  Allocated */
+      _edtors = . ;
+    }
+
+  .bss :
+    {
+      _sbss = . ;
+      *(.bss)
+      *(.bss.*)
+      *(.sbss)
+      *(.sbss.*)
+      *(.gnu.linkonce.b*)
+      *(COMMON)
+      . = ALIGN(4);
+      _ebss = . ;
+    }
+
+    /* Stabs debugging sections.    */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
@@ -0,0 +1,52 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/scripts/memory.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/* TODO: Add description for memory organisation */
+
+MEMORY
+{
+  /* ITCM boot address */
+
+  itcm  (rwx) : ORIGIN = 0x00000000, LENGTH = 64K
+
+  /* 2048Kb FLASH */
+
+  kflash (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+  uflash (rx) : ORIGIN = 0x08020000, LENGTH = 128K
+  xflash (rx) : ORIGIN = 0x08040000, LENGTH = 1792K
+
+  /* 288Kb SRAM123 */
+
+  ksram (rwx) : ORIGIN = 0x30000000, LENGTH = 16K
+  usram (rwx) : ORIGIN = 0x30004000, LENGTH = 16K
+  xsram (rwx) : ORIGIN = 0x30008000, LENGTH = 288K - 32K
+
+  /* 512Kb of contiguous AXI SRAM */
+
+  sram (rwx)  : ORIGIN = 0x24000000, LENGTH = 512K
+
+  /* DTCM SRAM */
+
+  dtcm1 (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+  dtcm2 (rwx) : ORIGIN = 0x20010000, LENGTH = 64K
+
+  sram4 (rwx) : ORIGIN = 0x38000000, LENGTH = 64K
+  bbram (rwx) : ORIGIN = 0x38800000, LENGTH = 4K
+}
@@ -0,0 +1,99 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/scripts/user-space.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/* NOTE:  This depends on the memory.ld script having been included prior to
+ * this script.
+ */
+
+OUTPUT_ARCH(arm)
+SECTIONS
+{
+    .userspace : {
+        *(.userspace)
+    } > uflash
+
+    .text : {
+        _stext = ABSOLUTE(.);
+        *(.text .text.*)
+        *(.fixup)
+        *(.gnu.warning)
+        *(.rodata .rodata.*)
+        *(.gnu.linkonce.t.*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.got)
+        *(.gcc_except_table)
+        *(.gnu.linkonce.r.*)
+        _etext = ABSOLUTE(.);
+    } > uflash
+
+    .init_section : {
+        _sinit = ABSOLUTE(.);
+        KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+        KEEP(*(.init_array EXCLUDE_FILE(*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o) .ctors))
+        _einit = ABSOLUTE(.);
+    } > uflash
+
+    .ARM.extab : {
+        *(.ARM.extab*)
+    } > uflash
+
+    __exidx_start = ABSOLUTE(.);
+    .ARM.exidx : {
+        *(.ARM.exidx*)
+    } > uflash
+
+    __exidx_end = ABSOLUTE(.);
+
+    _eronly = ABSOLUTE(.);
+
+    .data : {
+        _sdata = ABSOLUTE(.);
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        CONSTRUCTORS
+        . = ALIGN(4);
+        _edata = ABSOLUTE(.);
+    } > usram AT > uflash
+
+    .bss : {
+        _sbss = ABSOLUTE(.);
+        *(.bss .bss.*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON)
+        . = ALIGN(4);
+        _ebss = ABSOLUTE(.);
+    } > usram
+
+    /* Stabs debugging sections */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
@@ -0,0 +1,60 @@
+# ##############################################################################
+# boards/arm/stm32h7/stm32h750b-dk/src/CMakeLists.txt
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+set(SRCS stm32_boot.c stm32_bringup.c)
+
+if(CONFIG_ARCH_LEDS)
+  list(APPEND SRCS stm32_autoleds.c)
+else()
+  list(APPEND SRCS stm32_userleds.c)
+endif()
+
+if(CONFIG_STM32H7_OTGFS)
+  list(APPEND SRCS stm32_usb.c)
+endif()
+
+if(CONFIG_BOARDCTL)
+  list(APPEND SRCS stm32_appinitialize.c)
+endif()
+
+if(CONFIG_TESTING_OSTEST)
+  list(APPEND SRCS stm32_ostest.c)
+endif()
+
+if(CONFIG_BOARDCTL_RESET)
+  list(APPEND SRCS stm32_reset.c)
+endif()
+
+if(CONFIG_INPUT_FT5X06)
+  list(APPEND SRCS stm32_ft5x06.c)
+endif()
+
+if(CONFIG_STM32H7_LTDC)
+  list(APPEND SRCS stm32_lcd.c)
+endif()
+
+target_sources(board PRIVATE ${SRCS})
+
+if(CONFIG_ARCH_CHIP_STM32H7_CORTEXM7)
+  set_property(GLOBAL PROPERTY LD_SCRIPT "${NUTTX_BOARD_DIR}/scripts/flash.ld")
+else()
+  set_property(GLOBAL PROPERTY LD_SCRIPT
+                               "${NUTTX_BOARD_DIR}/scripts/flash_m4.ld")
+endif()
@@ -0,0 +1,55 @@
+############################################################################
+# boards/arm/stm32h7/stm32h750b-dk/src/Makefile
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/Make.defs
+
+CSRCS = stm32_boot.c stm32_bringup.c
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += stm32_autoleds.c
+else
+CSRCS += stm32_userleds.c
+endif
+
+ifeq ($(CONFIG_STM32H7_OTGFS),y)
+CSRCS += stm32_usb.c
+endif
+
+ifeq ($(CONFIG_BOARDCTL),y)
+CSRCS += stm32_appinitialize.c
+endif
+
+ifeq ($(CONFIG_TESTING_OSTEST),y)
+CSRCS += stm32_ostest.c
+endif
+
+ifeq ($(CONFIG_BOARDCTL_RESET),y)
+CSRCS += stm32_reset.c
+endif
+
+ifeq ($(CONFIG_INPUT_FT5X06),y)
+CSRCS += stm32_ft5x06.c
+endif
+
+ifeq ($(CONFIG_STM32H7_LTDC),y)
+CSRCS += stm32_lcd.c
+endif
+
+include $(TOPDIR)/boards/Board.mk
@@ -0,0 +1,76 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_appinitialize.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/board.h>
+#include <sys/types.h>
+
+#include "stm32h750b-dk.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ *   Perform application specific initialization.  This function is never
+ *   called directly from application code, but only indirectly via the
+ *   (non-standard) boardctl() interface using the command BOARDIOC_INIT.
+ *
+ * Input Parameters:
+ *   arg - The boardctl() argument is passed to the board_app_initialize()
+ *         implementation without modification.  The argument has no
+ *         meaning to NuttX; the meaning of the argument is a contract
+ *         between the board-specific initialization logic and the
+ *         matching application logic.  The value could be such things as a
+ *         mode enumeration value, a set of DIP switch switch settings, a
+ *         pointer to configuration data read from a file or serial FLASH,
+ *         or whatever you would like to do with it.  Every implementation
+ *         should accept zero/NULL as a default configuration.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; a negated errno value is returned on
+ *   any failure to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int board_app_initialize(uintptr_t arg)
+{
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+  /* Board initialization already performed by board_late_initialize() */
+
+  return OK;
+#else
+  /* Perform board-specific initialization */
+
+  return stm32_bringup();
+#endif
+}
@@ -0,0 +1,173 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_autoleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "stm32_gpio.h"
+#include "stm32h750b-dk.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define ARRAYSIZE(x) (sizeof((x)) / sizeof((x)[0]))
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* Indexed by BOARD_LED_<color> */
+
+static const uint32_t g_ledmap[BOARD_NLEDS] =
+{
+  GPIO_LED_GREEN,
+  GPIO_LED_ORANGE,
+  GPIO_LED_RED,
+};
+
+static bool g_initialized;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void phy_set_led(int led, bool state)
+{
+  /* Active High */
+
+  stm32_gpiowrite(g_ledmap[led], state);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_autoled_initialize
+ ****************************************************************************/
+
+void board_autoled_initialize(void)
+{
+  int i;
+
+  /* Configure the LD1 GPIO for output. Initial state is OFF */
+
+  for (i = 0; i < ARRAYSIZE(g_ledmap); i++)
+    {
+      stm32_configgpio(g_ledmap[i]);
+    }
+}
+
+/****************************************************************************
+ * Name: board_autoled_on
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+  switch (led)
+    {
+    default:
+      break;
+
+    case LED_HEAPALLOCATE:
+      phy_set_led(BOARD_LED_BLUE, true);
+      break;
+
+    case LED_IRQSENABLED:
+      phy_set_led(BOARD_LED_BLUE, false);
+      phy_set_led(BOARD_LED_GREEN, true);
+      break;
+
+    case LED_STACKCREATED:
+      phy_set_led(BOARD_LED_GREEN, true);
+      phy_set_led(BOARD_LED_BLUE, true);
+      g_initialized = true;
+      break;
+
+    case LED_INIRQ:
+      phy_set_led(BOARD_LED_BLUE, true);
+      break;
+
+    case LED_SIGNAL:
+      phy_set_led(BOARD_LED_GREEN, true);
+      break;
+
+    case LED_ASSERTION:
+      phy_set_led(BOARD_LED_RED, true);
+      phy_set_led(BOARD_LED_BLUE, true);
+      break;
+
+    case LED_PANIC:
+      phy_set_led(BOARD_LED_RED, true);
+      break;
+
+    case LED_IDLE : /* IDLE */
+      phy_set_led(BOARD_LED_RED, true);
+    break;
+    }
+}
+
+/****************************************************************************
+ * Name: board_autoled_off
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+  switch (led)
+    {
+    default:
+      break;
+
+    case LED_SIGNAL:
+      phy_set_led(BOARD_LED_GREEN, false);
+      break;
+
+    case LED_INIRQ:
+      phy_set_led(BOARD_LED_BLUE, false);
+      break;
+
+    case LED_ASSERTION:
+      phy_set_led(BOARD_LED_RED, false);
+      phy_set_led(BOARD_LED_BLUE, false);
+      break;
+
+    case LED_PANIC:
+      phy_set_led(BOARD_LED_RED, false);
+      break;
+
+    case LED_IDLE : /* IDLE */
+      phy_set_led(BOARD_LED_RED, false);
+    break;
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
@@ -0,0 +1,83 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_boot.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "stm32h750b-dk.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_boardinitialize
+ *
+ * Description:
+ *   All STM32 architectures must provide the following entry point.
+ *   This entry point is called early in the initialization -- after all
+ *   memory has been configured and mapped but before any devices have been
+ *   initialized.
+ *
+ ****************************************************************************/
+
+void stm32_boardinitialize(void)
+{
+#ifdef CONFIG_ARCH_LEDS
+  /* Configure on-board LEDs if LED support has been selected. */
+
+  board_autoled_initialize();
+#endif
+
+#if defined(CONFIG_STM32H7_OTGFS) || defined(CONFIG_STM32H7_HOST)
+  /* Initialize USB */
+
+  stm32_usbinitialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_late_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_late_initialize().  board_late_initialize()
+ *   will be called immediately after up_initialize() is called and just
+ *   before the initial application is started.  This additional
+ *   initialization phase may be used, for example, to initialize board-
+ *   specific device drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+void board_late_initialize(void)
+{
+  stm32_bringup();
+}
+#endif
@@ -0,0 +1,267 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_bringup.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <syslog.h>
+#include <errno.h>
+
+#include <nuttx/fs/fs.h>
+#include <nuttx/mtd/mtd.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/usb/usbmonitor.h>
+
+#ifdef CONFIG_STM32H7_OTGFS
+#include "stm32_usbhost.h"
+#endif
+
+#ifdef CONFIG_VIDEO_FB
+#  include <nuttx/video/fb.h>
+#endif
+
+#ifdef CONFIG_RPTUN
+#  include "stm32_rptun.h"
+#endif
+
+#ifdef CONFIG_RPMSG_UART
+#  include <nuttx/serial/uart_rpmsg.h>
+#endif
+
+#include "stm32_gpio.h"
+
+#include "stm32h750b-dk.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void convert_lcd_rgb565(void)
+{
+  /* Put LCD_{R0,R1,R2,G0,G1,B0,B1,B2} in low level */
+
+  stm32_configgpio(GPIO_LCD_R0);
+  stm32_gpiowrite(GPIO_LCD_R0, 0);
+  stm32_configgpio(GPIO_LCD_R1);
+  stm32_gpiowrite(GPIO_LCD_R1, 0);
+  stm32_configgpio(GPIO_LCD_R2);
+  stm32_gpiowrite(GPIO_LCD_R2, 0);
+  stm32_configgpio(GPIO_LCD_G0);
+  stm32_gpiowrite(GPIO_LCD_G0, 0);
+  stm32_configgpio(GPIO_LCD_G1);
+  stm32_gpiowrite(GPIO_LCD_G1, 0);
+  stm32_configgpio(GPIO_LCD_B0);
+  stm32_gpiowrite(GPIO_LCD_B0, 0);
+  stm32_configgpio(GPIO_LCD_B1);
+  stm32_gpiowrite(GPIO_LCD_B1, 0);
+  stm32_configgpio(GPIO_LCD_B2);
+  stm32_gpiowrite(GPIO_LCD_B2, 0);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_RPMSG_UART
+/****************************************************************************
+ * Name: rpmsg_serialinit
+ ****************************************************************************/
+
+void rpmsg_serialinit(void)
+{
+#ifdef CONFIG_ARCH_CHIP_STM32H7_CORTEXM7
+  uart_rpmsg_init("cm4", "proxy", 4096, false);
+#endif
+
+#ifdef CONFIG_ARCH_CHIP_STM32H7_CORTEXM4
+#  ifdef CONFIG_RPMSG_UART_CONSOLE
+  uart_rpmsg_init("cm7", "proxy", 4096, true);
+#  else
+  uart_rpmsg_init("cm7", "proxy", 4096, false);
+#  endif
+#endif
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=n && CONFIG_BOARDCTL=y &&
+ *   CONFIG_NSH_ARCHINIT:
+ *     Called from the NSH library
+ *
+ ****************************************************************************/
+
+int stm32_bringup(void)
+{
+  int ret;
+#ifdef CONFIG_RAMMTD
+  uint8_t *ramstart;
+#endif
+
+  UNUSED(ret);
+
+  convert_lcd_rgb565();
+
+#ifdef CONFIG_FS_PROCFS
+  /* Mount the procfs file system */
+
+  ret = nx_mount(NULL, "/proc", "procfs", 0, NULL);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to mount the PROC filesystem: %d\n",  ret);
+    }
+#endif /* CONFIG_FS_PROCFS */
+
+#ifdef CONFIG_RPTUN
+#  ifdef CONFIG_ARCH_CHIP_STM32H7_CORTEXM7
+  stm32_rptun_init("cm4");
+#  else
+  stm32_rptun_init("cm7");
+#  endif
+#endif
+
+#ifdef CONFIG_INPUT_FT5X06
+  /* Initialize the touchscreen.
+   * WARNING: stm32_tsc_setup() cannot be called from the IDLE thread.
+   */
+
+  ret = stm32_tsc_setup(0);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_tsc_setup failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_VIDEO_FB
+  /* Initialize and register the framebuffer driver */
+
+  ret = fb_register(0, 0);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: fb_register() failed: %d\n", ret);
+    }
+#endif
+
+#if !defined(CONFIG_ARCH_LEDS) && defined(CONFIG_USERLED_LOWER)
+  /* Register the LED driver */
+
+  ret = userled_lower_initialize("/dev/userleds");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_RAMMTD
+  /* Create a RAM MTD device if configured */
+
+  ramstart = kmm_malloc(128 * 1024);
+  if (ramstart == NULL)
+    {
+      syslog(LOG_ERR, "ERROR: Allocation for RAM MTD failed\n");
+    }
+  else
+    {
+      /* Initialized the RAM MTD */
+
+      struct mtd_dev_s *mtd = rammtd_initialize(ramstart, 128 * 1024);
+      if (mtd == NULL)
+        {
+          syslog(LOG_ERR, "ERROR: rammtd_initialize failed\n");
+          kmm_free(ramstart);
+        }
+      else
+        {
+          /* Erase the RAM MTD */
+
+          ret = mtd->ioctl(mtd, MTDIOC_BULKERASE, 0);
+          if (ret < 0)
+            {
+              syslog(LOG_ERR, "ERROR: IOCTL MTDIOC_BULKERASE failed\n");
+            }
+
+#ifdef CONFIG_FS_LITTLEFS
+          /* Register the MTD driver so that it can be accessed from the
+           * VFS.
+           */
+
+          ret = register_mtddriver("/dev/rammtd", mtd, 0755, NULL);
+          if (ret < 0)
+            {
+              syslog(LOG_ERR, "ERROR: Failed to register MTD driver: %d\n",
+                     ret);
+            }
+
+          /* Mount the LittleFS file system */
+
+          ret = nx_mount("/dev/rammtd", "/mnt/lfs", "littlefs", 0,
+                         "forceformat");
+          if (ret < 0)
+            {
+              syslog(LOG_ERR,
+                     "ERROR: Failed to mount LittleFS at /mnt/lfs: %d\n",
+                     ret);
+            }
+#endif
+        }
+    }
+#endif
+
+#ifdef HAVE_USBHOST
+  /* Initialize USB host operation.  stm32_usbhost_initialize()
+   * starts a thread will monitor for USB connection and
+   * disconnection events.
+   */
+
+  ret = stm32_usbhost_initialize();
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to initialize USB host: %d\n",
+             ret);
+    }
+#endif
+
+#ifdef HAVE_USBMONITOR
+  /* Start the USB Monitor */
+
+  ret = usbmonitor_start();
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to start USB monitor: %d\n",
+             ret);
+    }
+#endif
+
+  return OK;
+}
@@ -0,0 +1,301 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_ft5x06.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <assert.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/input/ft5x06.h>
+#include <arch/board/board.h>
+
+#include "stm32_gpio.h"
+#include "stm32_i2c.h"
+
+#include "stm32h750b-dk.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define FT5X06_FREQUENCY 100000  /* For now, will boost later */
+
+#ifdef CONFIG_INPUT_FT5X06
+#ifndef CONFIG_INPUT
+#  error "FT5x06 support requires CONFIG_INPUT"
+#endif
+
+#ifndef CONFIG_STM32H7_I2C4
+#  error "FT5x06 support requires CONFIG_STM32H7_I2C4"
+#endif
+
+#ifndef CONFIG_FT5X06_I2CDEV
+#  define CONFIG_FT5X06_I2CDEV 4
+#endif
+
+#if CONFIG_FT5X06_I2CDEV != 4
+#  error "CONFIG_FT5X06_I2CDEV must be four"
+#endif
+
+#ifndef CONFIG_FT5X06_DEVMINOR
+#  define CONFIG_FT5X06_DEVMINOR 0
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct stm32_ft5x06_config_s
+{
+  xcpt_t      handler;  /* The FT5x06 interrupt handler */
+  void       *arg;      /* Interrupt handler argument */
+};
+
+/****************************************************************************
+ * Private Function Ptototypes
+ ****************************************************************************/
+
+#ifndef CONFIG_FT5X06_POLLMODE
+static int  stm32_ft5x06_attach(const struct ft5x06_config_s *config,
+                                xcpt_t isr, void *arg);
+static void stm32_ft5x06_enable(const struct ft5x06_config_s *config,
+                                bool enable);
+static void stm32_ft5x06_clear(const struct ft5x06_config_s *config);
+#endif
+static void stm32_ft5x06_wakeup(const struct ft5x06_config_s *config);
+static void stm32_ft5x06_nreset(const struct ft5x06_config_s *config,
+                                bool state);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const struct ft5x06_config_s g_ft5x06_config =
+{
+  .address   = FT5X06_I2C_ADDRESS,
+  .frequency = FT5X06_FREQUENCY,
+#ifndef CONFIG_FT5X06_POLLMODE
+  .attach    = stm32_ft5x06_attach,
+  .enable    = stm32_ft5x06_enable,
+  .clear     = stm32_ft5x06_clear,
+#endif
+  .wakeup    = stm32_ft5x06_wakeup,
+  .nreset    = stm32_ft5x06_nreset
+};
+
+#ifndef CONFIG_FT5X06_POLLMODE
+static struct stm32_ft5x06_config_s g_priv_config =
+{
+  .handler     = NULL,
+  .arg         = NULL,
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_ft5x06_attach
+ *
+ * Description:
+ *   Attach an FT5x06 interrupt handler to a GPIO interrupt
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_FT5X06_POLLMODE
+static int  stm32_ft5x06_attach(const struct ft5x06_config_s *config,
+                                xcpt_t isr, void *arg)
+{
+  iinfo("Saving handler %p\n", isr);
+
+  /* Just save the handler.  We will use it when EXTI interruptsare enabled */
+
+  if (isr)
+    {
+      /* Just save the address of the handler for now.  The new handler will
+       * be attached when the interrupt is next enabled.
+       */
+
+      iinfo("Attaching %p\n", isr);
+      g_priv_config.handler = isr;
+      g_priv_config.arg     = arg;
+    }
+  else
+    {
+      iinfo("Detaching %p\n", g_priv_config.handler);
+      stm32_ft5x06_enable(config, false);
+      g_priv_config.handler = NULL;
+      g_priv_config.arg     = NULL;
+    }
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_ft5x06_enable
+ *
+ * Description:
+ *   Enable or disable a GPIO interrupt
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_FT5X06_POLLMODE
+static void stm32_ft5x06_enable(const struct ft5x06_config_s *config,
+                                bool enable)
+{
+  irqstate_t flags;
+
+  /* Attach and enable, or detach and disable.  Enabling and disabling GPIO
+   * interrupts is a multi-step process so the safest thing is to keep
+   * interrupts disabled during the reconfiguration.
+   */
+
+  flags = enter_critical_section();
+  if (enable)
+    {
+      /* Configure the EXTI interrupt using the SAVED handler */
+
+      stm32_gpiosetevent(GPIO_FT5X06_INT, true, false, true,
+                         g_priv_config.handler, g_priv_config.arg);
+    }
+  else
+    {
+      /* Configure the EXTI interrupt with a NULL handler to disable it */
+
+     stm32_gpiosetevent(GPIO_FT5X06_INT, false, false, false,
+                        NULL, NULL);
+    }
+
+  leave_critical_section(flags);
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_ft5x06_clear
+ *
+ * Description:
+ *   Acknowledge/clear any pending GPIO interrupt
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_FT5X06_POLLMODE
+static void stm32_ft5x06_clear(const struct ft5x06_config_s *config)
+{
+  /* Does nothing */
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_ft5x06_wakeup
+ *
+ * Description:
+ *   Issue WAKE interrupt to FT5x06 to change the FT5x06 from Hibernate to
+ *   Active mode.
+ *
+ ****************************************************************************/
+
+static void stm32_ft5x06_wakeup(const struct ft5x06_config_s *config)
+{
+  /* We do not have access to the WAKE pin in the implementation */
+}
+
+/****************************************************************************
+ * Name: stm32_ft5x06_nreset
+ *
+ * Description:
+ *   Control the chip reset pin
+ *
+ ****************************************************************************/
+
+static void stm32_ft5x06_nreset(const struct ft5x06_config_s *config,
+                                bool nstate)
+{
+  /* We do not have access to the RESET pin in the implementation */
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_tsc_setup
+ *
+ * Description:
+ *   This function is called by board-bringup logic to configure the
+ *   touchscreen device.  This function will register the driver as
+ *   /dev/inputN where N is the minor device number.
+ *
+ * Input Parameters:
+ *   minor   - The input device minor number
+ *
+ * Returned Value:
+ *   Zero is returned on success.  Otherwise, a negated errno value is
+ *   returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int stm32_tsc_setup(int minor)
+{
+  struct i2c_master_s *dev;
+  int ret;
+
+  iinfo("minor %d\n", minor);
+  DEBUGASSERT(minor == CONFIG_FT5X06_DEVMINOR);
+
+  /* Check if we are already initialized */
+
+  iinfo("Initializing\n");
+
+  /* Configure the FT5X06 interrupt pin as an input */
+
+  stm32_configgpio(GPIO_FT5X06_INT);
+
+  /* Get an instance of the I2C interface */
+
+  dev = stm32_i2cbus_initialize(CONFIG_FT5X06_I2CDEV);
+  if (!dev)
+    {
+      ierr("ERROR: Failed to initialize I2C bus %d\n", CONFIG_FT5X06_I2CDEV);
+      return -ENODEV;
+    }
+
+  /* Initialize and register the I2C touchscreen device */
+
+  ret = ft5x06_register(dev, &g_ft5x06_config, CONFIG_FT5X06_DEVMINOR);
+  if (ret < 0)
+    {
+      ierr("ERROR: Failed to register FT5x06 driver: %d\n", ret);
+      stm32_i2cbus_uninitialize(dev);
+      return ret;
+    }
+
+  iinfo("ft5x06_register Ok\n");
+
+  return OK;
+}
+
+#endif /* CONFIG_INPUT_FT5X06 */
@@ -0,0 +1,120 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_lcd.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/video/fb.h>
+#include <arch/board/board.h>
+
+#include "stm32_gpio.h"
+#include "stm32_ltdc.h"
+
+#include "stm32h750b-dk.h"
+
+#ifdef CONFIG_STM32H7_LTDC
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_fbinitialize
+ *
+ * Description:
+ *   Initialize the framebuffer video hardware associated with the display.
+ *
+ * Input Parameters:
+ *   display - In the case of hardware with multiple displays, this
+ *     specifies the display.  Normally this is zero.
+ *
+ * Returned Value:
+ *   Zero is returned on success; a negated errno value is returned on any
+ *   failure.
+ *
+ ****************************************************************************/
+
+int up_fbinitialize(int display)
+{
+  /* Custom LCD display with RGB interface */
+
+  stm32_configgpio(GPIO_LCD_DISP);
+  stm32_configgpio(GPIO_LCD_BL);
+
+  stm32_gpiowrite(GPIO_LCD_DISP, true);
+  stm32_gpiowrite(GPIO_LCD_BL, true);
+
+  return stm32_ltdcinitialize();
+}
+
+/****************************************************************************
+ * Name: up_fbgetvplane
+ *
+ * Description:
+ *   Return a a reference to the framebuffer object for the specified video
+ *   plane of the specified plane.
+ *   Many OSDs support multiple planes of video.
+ *
+ * Input Parameters:
+ *   display - In the case of hardware with multiple displays, this
+ *     specifies the display.  Normally this is zero.
+ *   vplane - Identifies the plane being queried.
+ *
+ * Returned Value:
+ *   A non-NULL pointer to the frame buffer access structure is returned on
+ *   success; NULL is returned on any failure.
+ *
+ ****************************************************************************/
+
+struct fb_vtable_s *up_fbgetvplane(int display, int vplane)
+{
+  return stm32_ltdcgetvplane(vplane);
+}
+
+/****************************************************************************
+ * Name: up_fbuninitialize
+ *
+ * Description:
+ *   Uninitialize the framebuffer support for the specified display.
+ *
+ * Input Parameters:
+ *   display - In the case of hardware with multiple displays, this
+ *     specifies the display.  Normally this is zero.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void up_fbuninitialize(int display)
+{
+  stm32_gpiowrite(GPIO_LCD_DISP, false);
+  stm32_gpiowrite(GPIO_LCD_BL, false);
+
+  stm32_ltdcuninitialize();
+}
+#endif /* CONFIG_STM32_LTDC */
@@ -0,0 +1,95 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_ostest.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <debug.h>
+
+#include <nuttx/irq.h>
+#include <arch/board/board.h>
+
+#include "arm_arch.h"
+#include "arm_internal.h"
+#include "stm32h745b-dk.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+#undef HAVE_FPU
+#if defined(CONFIG_ARCH_FPU) && !defined(CONFIG_TESTING_OSTEST_FPUTESTDISABLE) && \
+    defined(CONFIG_TESTING_OSTEST_FPUSIZE) && defined(CONFIG_SCHED_WAITPID)
+#    define HAVE_FPU 1
+#endif
+
+#ifdef HAVE_FPU
+
+#if CONFIG_TESTING_OSTEST_FPUSIZE != (4*SW_FPU_REGS)
+#  error "CONFIG_TESTING_OSTEST_FPUSIZE has the wrong size"
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static uint32_t g_saveregs[XCPTCONTEXT_REGS];
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/* Given an array of size CONFIG_TESTING_OSTEST_FPUSIZE, this function will
+ * return the current FPU registers.
+ */
+
+void arch_getfpu(uint32_t *fpusave)
+{
+  irqstate_t flags;
+
+  /* Take a snapshot of the thread context right now */
+
+  flags = enter_critical_section();
+  arm_saveusercontext(g_saveregs);
+
+  /* Return only the floating register values */
+
+  memcpy(fpusave, &g_saveregs[REG_S0], (4*SW_FPU_REGS));
+  leave_critical_section(flags);
+}
+
+/* Given two arrays of size CONFIG_TESTING_OSTEST_FPUSIZE this function
+ * will compare them and return true if they are identical.
+ */
+
+bool arch_cmpfpu(const uint32_t *fpusave1, const uint32_t *fpusave2)
+{
+  return memcmp(fpusave1, fpusave2, (4*SW_FPU_REGS)) == 0;
+}
+
+#endif /* HAVE_FPU */
@@ -0,0 +1,62 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_reset.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+
+#ifdef CONFIG_BOARDCTL_RESET
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_reset
+ *
+ * Description:
+ *   Reset board.  Support for this function is required by board-level
+ *   logic if CONFIG_BOARDCTL_RESET is selected.
+ *
+ * Input Parameters:
+ *   status - Status information provided with the reset event.  This
+ *            meaning of this status information is board-specific.  If not
+ *            used by a board, the value zero may be provided in calls to
+ *            board_reset().
+ *
+ * Returned Value:
+ *   If this function returns, then it was not possible to power-off the
+ *   board due to some constraints.  The return value int this case is a
+ *   board-specific reason for the failure to shutdown.
+ *
+ ****************************************************************************/
+
+int board_reset(int status)
+{
+  up_systemreset();
+  return 0;
+}
+
+#endif /* CONFIG_BOARDCTL_RESET */
@@ -0,0 +1,324 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_usb.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <sched.h>
+#include <errno.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/kthread.h>
+#include <nuttx/usb/usbdev.h>
+#include <nuttx/usb/usbhost.h>
+#include <nuttx/usb/usbdev_trace.h>
+
+#include "chip.h"
+#include "stm32_gpio.h"
+#include "stm32_otg.h"
+
+#include "stm32h750b-dk.h"
+
+#ifdef CONFIG_STM32H7_OTGFS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
+#  define HAVE_USB 1
+#else
+#  warning "CONFIG_STM32_OTGFS is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
+#  undef HAVE_USB
+#endif
+
+#ifndef CONFIG_USBHOST_DEFPRIO
+#  define CONFIG_USBHOST_DEFPRIO 100
+#endif
+
+#ifndef CONFIG_USBHOST_STACKSIZE
+#  define CONFIG_USBHOST_STACKSIZE 2048
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+static struct usbhost_connection_s *g_usbconn;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: usbhost_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+static int usbhost_waiter(int argc, char *argv[])
+{
+  struct usbhost_hubport_s *hport;
+
+  uinfo("Running\n");
+  for (; ; )
+    {
+      /* Wait for the device to change state */
+
+      DEBUGVERIFY(CONN_WAIT(g_usbconn, &hport));
+      uinfo("%s\n", hport->connected ? "connected" : "disconnected");
+
+      /* Did we just become connected? */
+
+      if (hport->connected)
+        {
+          /* Yes.. enumerate the newly connected device */
+
+          CONN_ENUMERATE(g_usbconn, hport);
+        }
+    }
+
+  /* Keep the compiler from complaining */
+
+  return 0;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_usbinitialize
+ *
+ * Description:
+ *   Called from stm32_usbinitialize very early in inialization to setup
+ *   USB-related GPIO pins for the nucleo-144 board.
+ *
+ ****************************************************************************/
+
+void stm32_usbinitialize(void)
+{
+  /* The OTG FS has an internal soft pull-up.
+   * No GPIO configuration is required
+   */
+
+  /* Configure the OTG FS VBUS sensing GPIO,
+   * Power On, and Overcurrent GPIOs
+   */
+
+#ifdef CONFIG_STM32H7_OTGFS
+  stm32_configgpio(GPIO_OTGFS_VBUS);
+  stm32_configgpio(GPIO_OTGFS_PWRON);
+  stm32_configgpio(GPIO_OTGFS_OVER);
+#endif
+}
+
+/****************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host
+ *   functionality.
+ *   This function will start a thread that will monitor for device
+ *   connection/disconnection events.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+int stm32_usbhost_initialize(void)
+{
+  int pid;
+#if defined(CONFIG_USBHOST_HUB)    || defined(CONFIG_USBHOST_MSC) || \
+    defined(CONFIG_USBHOST_HIDKBD) || defined(CONFIG_USBHOST_HIDMOUSE)
+  int ret;
+#endif
+
+  /* First, register all of the class drivers needed to support the drivers
+   * that we care about:
+   */
+
+  uinfo("Register class drivers\n");
+
+#ifdef CONFIG_USBHOST_HUB
+  /* Initialize USB hub class support */
+
+  ret = usbhost_hub_initialize();
+  if (ret < 0)
+    {
+      uerr("ERROR: usbhost_hub_initialize failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_MSC
+  /* Register the USB mass storage class class */
+
+  ret = usbhost_msc_initialize();
+  if (ret != OK)
+    {
+      uerr("ERROR: Failed to register the mass storage class: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_CDCACM
+  /* Register the CDC/ACM serial class */
+
+  ret = usbhost_cdcacm_initialize();
+  if (ret != OK)
+    {
+      uerr("ERROR: Failed to register the CDC/ACM serial class: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_HIDKBD
+  /* Initialize the HID keyboard class */
+
+  ret = usbhost_kbdinit();
+  if (ret != OK)
+    {
+      uerr("ERROR: Failed to register the HID keyboard class\n");
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_HIDMOUSE
+  /* Initialize the HID mouse class */
+
+  ret = usbhost_mouse_init();
+  if (ret != OK)
+    {
+      uerr("ERROR: Failed to register the HID mouse class\n");
+    }
+#endif
+
+  /* Then get an instance of the USB host interface */
+
+  uinfo("Initialize USB host\n");
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
+    {
+      /* Start a thread to handle device connection. */
+
+      uinfo("Start usbhost_waiter\n");
+
+      pid = kthread_create("usbhost", CONFIG_USBHOST_DEFPRIO,
+                           CONFIG_USBHOST_STACKSIZE,
+                           usbhost_waiter, NULL);
+      return pid < 0 ? -ENOEXEC : OK;
+    }
+
+  return -ENODEV;
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_usbhost_vbusdrive
+ *
+ * Description:
+ *   Enable/disable driving of VBUS 5V output. This function must be
+ *   provided be each platform that implements the STM32 OTG FS host
+ *   interface
+ *
+ *   "On-chip 5 V VBUS generation is not supported. For this reason, a
+ *    charge pump or, if 5 V are available on the application board, a
+ *    basic power switch, must be added externally to drive the 5 V VBUS
+ *    line. The external charge pump can be driven by any GPIO output.
+ *    When the application decides to power on VBUS using the chosen GPIO,
+ *    it must also set the port power bit in the host port control and status
+ *    register (PPWR bit in OTG_FS_HPRT).
+ *
+ *   "The application uses this field to control power to this port, and
+ *    the core clears this bit on an overcurrent condition."
+ *
+ * Input Parameters:
+ *   iface - For future growth to handle multiple USB host interface.
+ *           Should be zero.
+ *   enable - true: enable VBUS power; false: disable VBUS power
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+void stm32_usbhost_vbusdrive(int iface, bool enable)
+{
+  DEBUGASSERT(iface == 0);
+
+  /* Set the Power Switch by driving the active low enable pin */
+
+  stm32_gpiowrite(GPIO_OTGFS_PWRON, !enable);
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_setup_overcurrent
+ *
+ * Description:
+ *   Setup to receive an interrupt-level callback if an overcurrent
+ *   condition is detected.
+ *
+ * Input Parameters:
+ *   handler - New overcurrent interrupt handler
+ *   arg     - The argument provided for the interrupt handler
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value
+ *   is returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+int stm32_setup_overcurrent(xcpt_t handler, void *arg)
+{
+  return stm32_gpiosetevent(GPIO_OTGFS_OVER, true, true, true, handler, arg);
+}
+#endif
+
+/****************************************************************************
+ * Name:  stm32_usbsuspend
+ *
+ * Description:
+ *   Board logic must provide the stm32_usbsuspend logic if the USBDEV
+ *   driver is used. This function is called whenever the USB enters or
+ *   leaves suspend mode. This is an opportunity for the board logic to
+ *   shutdown clocks, power, etc. while the USB is suspended.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_USBDEV
+void stm32_usbsuspend(struct usbdev_s *dev, bool resume)
+{
+  uinfo("resume: %d\n", resume);
+}
+#endif
+
+#endif /* CONFIG_STM32_OTGFS */
@@ -0,0 +1,130 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32_userleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "stm32_gpio.h"
+
+#include "stm32h750b-dk.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define ARRAYSIZE(x) (sizeof((x)) / sizeof((x)[0]))
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* This array maps an LED number to GPIO pin configuration and is indexed by
+ * BOARD_LED_<color>
+ */
+
+static const uint32_t g_ledcfg[BOARD_NLEDS] =
+{
+  GPIO_LED_GREEN,
+  GPIO_LED_ORANGE,
+  GPIO_LED_RED,
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_userled_initialize
+ *
+ * Description:
+ *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ *   LEDs.  If CONFIG_ARCH_LEDS is not defined, then the
+ *   board_userled_initialize() is available to initialize the LED from user
+ *   application logic.
+ *
+ ****************************************************************************/
+
+uint32_t board_userled_initialize(void)
+{
+  int i;
+
+  /* Configure LED1-3 GPIOs for output */
+
+  for (i = 0; i < ARRAYSIZE(g_ledcfg); i++)
+    {
+      stm32_configgpio(g_ledcfg[i]);
+    }
+
+  return BOARD_NLEDS;
+}
+
+/****************************************************************************
+ * Name: board_userled
+ *
+ * Description:
+ *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ *  LEDs.  If CONFIG_ARCH_LEDS is not defined, then the board_userled() is
+ *  available to control the LED from user application logic.
+ *
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+  if ((unsigned)led < ARRAYSIZE(g_ledcfg))
+    {
+      stm32_gpiowrite(g_ledcfg[led], ledon);
+    }
+}
+
+/****************************************************************************
+ * Name: board_userled_all
+ *
+ * Description:
+ *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ *  LEDs.  If CONFIG_ARCH_LEDS is not defined, then the board_userled_all()
+ *  is available to control the LED from user application logic. NOTE: since
+ *  there is only a single LED on-board, this is function is not very useful.
+ *
+ ****************************************************************************/
+
+void board_userled_all(uint32_t ledset)
+{
+  int i;
+
+  /* Configure LED1-3 GPIOs for output */
+
+  for (i = 0; i < ARRAYSIZE(g_ledcfg); i++)
+    {
+      stm32_gpiowrite(g_ledcfg[i], (ledset & (1 << i)) != 0);
+    }
+}
+
+#endif /* !CONFIG_ARCH_LEDS */
@@ -0,0 +1,217 @@
+/****************************************************************************
+ * boards/arm/stm32h7/stm32h750b-dk/src/stm32h750b-dk.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_STM32H7_STM32H750B_DK_SRC_STM32H750B_DK_H
+#define __BOARDS_ARM_STM32H7_STM32H750B_DK_SRC_STM32H750B_DK_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+#define HAVE_USBDEV     1
+#define HAVE_USBHOST    1
+#define HAVE_USBMONITOR 1
+
+/* Can't support USB host or device features if USB OTG FS is not enabled */
+
+#ifndef CONFIG_STM32H7_OTGFS
+#  undef HAVE_USBDEV
+#  undef HAVE_USBHOST
+#endif
+
+/* Can't support USB device if USB device is not enabled */
+
+#ifndef CONFIG_USBDEV
+#  undef HAVE_USBDEV
+#endif
+
+/* Can't support USB host is USB host is not enabled */
+
+#ifndef CONFIG_USBHOST
+#  undef HAVE_USBHOST
+#endif
+
+/* Check if we should enable the USB monitor before starting NSH */
+
+#ifndef CONFIG_USBMONITOR
+#  undef HAVE_USBMONITOR
+#endif
+
+#ifndef HAVE_USBDEV
+#  undef CONFIG_USBDEV_TRACE
+#endif
+
+#if !defined(CONFIG_USBDEV_TRACE) && !defined(CONFIG_USBHOST_TRACE)
+#  undef HAVE_USBMONITOR
+#endif
+
+/* LED */
+
+#define GPIO_LD1       (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_50MHz | \
+                        GPIO_OUTPUT_CLEAR | GPIO_PORTI | GPIO_PIN13)
+#define GPIO_LD2       (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_50MHz | \
+                        GPIO_OUTPUT_CLEAR | GPIO_PORTJ | GPIO_PIN2)
+#define GPIO_LD3       (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_50MHz | \
+                        GPIO_OUTPUT_CLEAR | GPIO_PORTD | GPIO_PIN3)
+
+#define GPIO_LED_GREEN  GPIO_LD1
+#define GPIO_LED_ORANGE GPIO_LD2
+#define GPIO_LED_RED    GPIO_LD3
+
+#define GPIO_OTGFS_VBUS   (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz| \
+                           GPIO_OPENDRAIN|GPIO_PORTA|GPIO_PIN9)
+
+# define GPIO_OTGFS_PWRON  (GPIO_OUTPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|  \
+                           GPIO_PUSHPULL|GPIO_PORTD|GPIO_PIN10)
+
+#ifdef CONFIG_USBHOST
+#  define GPIO_OTGFS_OVER (GPIO_INPUT|GPIO_EXTI|GPIO_FLOAT| \
+                           GPIO_SPEED_100MHz|GPIO_PUSHPULL| \
+                           GPIO_PORTG|GPIO_PIN7)
+#else
+#  define GPIO_OTGFS_OVER (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz| \
+                           GPIO_PUSHPULL|GPIO_PORTG|GPIO_PIN7)
+#endif
+
+/* Touchscreen definitions **************************************************/
+
+/* The STM32H743I-DISCO have connectors for the LCD model RK043FN48H-CT672B.
+ * It comes with the FT5336GQQ (FT5X06) touchscreen chip integrated.
+ * FT5X06 is connected to the I2C4 bus.
+ */
+
+/* I2C4 address of the FT5336GQQ touchscreen chip */
+
+#define FT5X06_I2C_ADDRESS  0x38
+
+/* Touchscreen Interrupt line: PG2 */
+
+#define GPIO_FT5X06_INT    (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz| \
+                            GPIO_PUSHPULL|GPIO_PORTG|GPIO_PIN2)
+
+/* The reset line is active low: PB12 */
+
+#define GPIO_FT5X06_RST    (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN12)
+
+/* LCD */
+
+#define GPIO_LCD_DISP      (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_SET|GPIO_PORTD|GPIO_PIN7)
+
+#define GPIO_LCD_BL        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_SET|GPIO_PORTK|GPIO_PIN0)
+
+/* Convert 24-bit LCD to 16-bit */
+
+#define GPIO_LCD_R0        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTI|GPIO_PIN15)
+
+#define GPIO_LCD_R1        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTJ|GPIO_PIN0)
+
+#define GPIO_LCD_R2        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTJ|GPIO_PIN1)
+
+#define GPIO_LCD_G0        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTG|GPIO_PIN0)
+
+#define GPIO_LCD_G1        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTG|GPIO_PIN1)
+
+#define GPIO_LCD_B0        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTJ|GPIO_PIN12)
+
+#define GPIO_LCD_B1        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTJ|GPIO_PIN13)
+
+#define GPIO_LCD_B2        (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_CLEAR|GPIO_PORTJ|GPIO_PIN14)
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ ****************************************************************************/
+
+int stm32_bringup(void);
+
+/****************************************************************************
+ * Name: stm32_usbinitialize
+ *
+ * Description:
+ *   Called from stm32_usbinitialize very early in inialization to setup
+ *   USB-related GPIO pins for the stm32h750b-dk board.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32H7_OTGFS
+void weak_function stm32_usbinitialize(void);
+#endif
+
+/****************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host
+ *   functionality. This function will start a thread that will monitor for
+ *   device connection/disconnection events.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_STM32H7_OTGFS) && defined(CONFIG_USBHOST)
+int stm32_usbhost_initialize(void);
+#endif
+
+/****************************************************************************
+ * Name: stm32_tsc_setup
+ *
+ * Description:
+ *   This function is called by board-bringup logic to configure the
+ *   touchscreen device.  This function will register the driver as
+ *   /dev/inputN where N is the minor device number.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_INPUT_FT5X06
+int stm32_tsc_setup(int minor);
+#endif
+
+#endif /* __BOARDS_ARM_STM32H7_STM32H750B_DK_SRC_STM32H750B_DK_H */