boards/arm/stm32h7/stm32h747i-disco: support for FMC SDRAM

arch/arm/src/stm32h7/hardware/stm32_i2c.h

@@ -47,6 +47,8 @@
 
 #if defined(CONFIG_STM32H7_STM32H7X3XX)
 #  include "hardware/stm32h7x3xx_i2c.h"
+#elif defined(CONFIG_STM32H7_STM32H7X7XX)
+#  include "hardware/stm32h7x3xx_i2c.h"
 #else
 #  error "Unsupported STM32 H7 sub family"
 #endif

boards/arm/stm32h7/stm32h747i-disco/include/board.h

@@ -288,6 +288,61 @@
 
 /* Ethernet definitions *****************************************************/
 
+/* SDRAM FMC definitions ****************************************************/
+
+#define BOARD_FMC_CLK                   RCC_D1CCIPR_FMCSEL_HCLK
+#define BOARD_SDRAM2_SIZE               (32*1024*1024)
+
+/* BOARD_FMC_SDCR[1..2] - Initial value for SDRAM control registers for SDRAM
+ *      bank 1-2. Note that some bits in SDCR1 influence both SDRAM banks and
+ *      are unused in SDCR2!
+ */
+
+#define BOARD_FMC_SDCR1 \
+      (FMC_SDCR_SDCLK_2X | FMC_SDCR_BURST_READ | FMC_SDCR_RPIPE_0)
+#define BOARD_FMC_SDCR2 \
+      (FMC_SDCR_COLBITS_9 | FMC_SDCR_ROWBITS_12 | FMC_SDCR_WIDTH_32 |\
+       FMC_SDCR_BANKS_4 | FMC_SDCR_CASLAT_2)
+
+/* BOARD_FMC_SDTR[1..2] - Initial value for SDRAM timing registeres for SDRAM
+ *      bank 1-2. Note that some bits in SDTR1 influence both SDRAM banks and
+ *      are unused in SDTR2!
+ */
+
+#define BOARD_FMC_SDTR1 \
+      (FMC_SDTR_TRC(6) | FMC_SDTR_TRP(2))
+#define BOARD_FMC_SDTR2 \
+      (FMC_SDTR_TMRD(2) | FMC_SDTR_TXSR(6) | FMC_SDTR_TRAS(4) |\
+       FMC_SDTR_TWR(2) | FMC_SDTR_TRCD(2))
+
+#define BOARD_FMC_SDRAM_REFR_CYCLES     4096
+#define BOARD_FMC_SDRAM_REFR_PERIOD     64
+#define BOARD_FMC_SDRAM_AUTOREFRESH     8
+#define BOARD_FMC_SDRAM_MODE \
+      (FMC_SDCMR_MRD_BURST_LENGTH_1 |\
+       FMC_SDCMR_MRD_BURST_TYPE_SEQUENTIAL |\
+       FMC_SDCMR_MRD_CAS_LATENCY_2 |\
+       FMC_SDCMR_MRD_WRITEBURST_MODE_SINGLE)
+
+#define BOARD_FMC_GPIO_CONFIGS \
+       GPIO_FMC_A0, GPIO_FMC_A1, GPIO_FMC_A2, GPIO_FMC_A3, \
+       GPIO_FMC_A4, GPIO_FMC_A5, GPIO_FMC_A6, GPIO_FMC_A7, \
+       GPIO_FMC_A8, GPIO_FMC_A9, GPIO_FMC_A10, GPIO_FMC_A11, \
+       GPIO_FMC_A12, \
+       GPIO_FMC_D0, GPIO_FMC_D1, GPIO_FMC_D2, GPIO_FMC_D3, \
+       GPIO_FMC_D4, GPIO_FMC_D5, GPIO_FMC_D6, GPIO_FMC_D7, \
+       GPIO_FMC_D8, GPIO_FMC_D9, GPIO_FMC_D10, GPIO_FMC_D11, \
+       GPIO_FMC_D12, GPIO_FMC_D13, GPIO_FMC_D14, GPIO_FMC_D15, \
+       GPIO_FMC_D16, GPIO_FMC_D17, GPIO_FMC_D18, GPIO_FMC_D19, \
+       GPIO_FMC_D20, GPIO_FMC_D21, GPIO_FMC_D22, GPIO_FMC_D23, \
+       GPIO_FMC_D24, GPIO_FMC_D25, GPIO_FMC_D26, GPIO_FMC_D27, \
+       GPIO_FMC_D28, GPIO_FMC_D29, GPIO_FMC_D30, GPIO_FMC_D31, \
+       GPIO_FMC_NBL0, GPIO_FMC_NBL1, GPIO_FMC_NBL2, GPIO_FMC_NBL3, \
+       GPIO_FMC_BA0, GPIO_FMC_BA1, \
+       GPIO_FMC_SDNCAS, GPIO_FMC_SDNRAS, \
+       GPIO_FMC_SDNWE_3, GPIO_FMC_SDNE1_2, GPIO_FMC_SDCKE1_2, \
+       GPIO_FMC_SDCLK
+
 /* LED definitions **********************************************************/
 
 /* The board has 4 user LEDs.