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https://github.com/apache/nuttx.git
synced 2026-06-06 16:50:55 +08:00
Freescale KL25Z support from Alan Carvalho de Assis
This commit is contained in:
Gregory Nutt
@@ -312,6 +312,20 @@ extern "C" {
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void kl_boardinitialize(void);
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/************************************************************************************
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* Name: kl_tsi_initialize
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*
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* Description:
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* Initialize the TSI hardware and interface for the sliders on board the Freedom
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* KL25Z board. Register a character driver at /dev/tsi that may be used to read
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* from each sensor.
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*
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************************************************************************************/
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#ifdef CONFIG_KL_TSI
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void kl_tsi_initialize(void);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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@@ -42,6 +42,10 @@ AOBJS = $(ASRCS:.S=$(OBJEXT))
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CSRCS = kl_boardinitialize.c
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ifeq ($(CONFIG_KL_TSI),y)
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CSRCS += kl_tsi.c
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endif
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ifeq ($(CONFIG_HAVE_CXX),y)
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CSRCS += kl_cxxinitialize.c
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endif
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@@ -66,7 +70,7 @@ ifeq ($(CONFIG_WATCHDOG),y)
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CSRCS += kl_watchdog.c
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endif
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ifeq ($(CONFIG_NSH_ARCHINIT),y)
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ifeq ($(CONFIG_NSH_LIBRARY),y)
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CSRCS += kl_nsh.c
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endif
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@@ -100,3 +100,29 @@ void kl_boardinitialize(void)
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kl_ledinit();
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#endif
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}
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/****************************************************************************
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* Name: board_initialize
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*
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* Description:
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* If CONFIG_BOARD_INITIALIZE is selected, then an additional
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* initialization call will be performed in the boot-up sequence to a
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* function called board_initialize(). board_initialize() will be
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* called immediately after up_intitialize() is called and just before the
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* initial application is started. This additional initialization phase
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* may be used, for example, to initialize board-specific device drivers.
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*
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****************************************************************************/
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#ifdef CONFIG_BOARD_INITIALIZE
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void board_initialize(void)
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{
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/* Perform NSH initialization here instead of from the NSH. This
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* alternative NSH initialization is necessary when NSH is ran in user-space
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* but the initialization function must run in kernel space.
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*/
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#if defined(CONFIG_NSH_LIBRARY) && !defined(CONFIG_NSH_ARCHINIT)
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(void)nsh_archinitialize();
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#endif
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}
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#endif
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@@ -0,0 +1,92 @@
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/****************************************************************************
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* config/stm32f4discovery/src/kl_nsh.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#ifdef CONFIG_NSH_LIBRARY
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Debug ********************************************************************/
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#ifdef CONFIG_CPP_HAVE_VARARGS
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# if defined(CONFIG_DEBUG) || !defined(CONFIG_NSH_ARCHINIT)
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# define message(...) lowsyslog(__VA_ARGS__)
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# else
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# define message(...) printf(__VA_ARGS__)
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# endif
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#else
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# if defined(CONFIG_DEBUG) || !defined(CONFIG_NSH_ARCHINIT)
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# define message lowsyslog
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# else
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# define message printf
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# endif
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nsh_archinitialize
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*
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* Description:
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* Perform architecture specific initialization
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*
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* CONFIG_NSH_ARCHINIT=y :
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* Called from the NSH library
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*
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* CONFIG_BOARD_INITIALIZE=y, CONFIG_NSH_LIBRARY=y, &&
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* CONFIG_NSH_ARCHINIT=n :
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* Called from board_initialize().
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*
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****************************************************************************/
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int nsh_archinitialize(void)
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{
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return OK;
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}
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#endif /* CONFIG_NSH_LIBRARY */
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@@ -0,0 +1,261 @@
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/****************************************************************************
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* configs/freedom-kl25z/src/kl_tsi.c
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*
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* Copyright (C) 2013 Alan Carvalho de Assis
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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* with adaptions from Gregory Nutt <gnutt@nuttx.org>
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*
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* Reference: https://community.freescale.com/community/
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* the-embedded-beat/blog/2012/10/15/
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* using-the-touch-interface-on-the-freescale-freedom-development-platform
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/fs/fs.h>
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#include "up_arch.h"
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#include "kl_gpio.h"
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#include "chip/kl_tsi.h"
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#include "chip/kl_pinmux.h"
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#include "chip/kl_sim.h"
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#ifdef CONFIG_KL_TSI
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* The touchpad on the Freedom KL25Z board connects to the MCU via:
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*
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* PTB16 TWI0_CH9
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* PTB17 TSI0_CH10
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*/
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#define NSENSORS 2
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static void tsi_calibrate(void);
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static ssize_t tsi_read(FAR struct file *filep, FAR char *buffer, size_t buflen);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static uint16_t g_defcap[NSENSORS]; /* Default capacitance for each sensor */
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static uint16_t g_currdelta = 0; /* Current delta for the current button */
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static uint8_t g_channel = 0; /* Current g_channel */
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/* Channel assigned to each sensor */
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static uint8_t const g_chsensor[NSENSORS] = { 9, 10 };
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/* Character driver operations */
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static const struct file_operations tsi_ops =
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{
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0, /* open */
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0, /* close */
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tsi_read, /* read */
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0, /* write */
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0, /* seek */
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0, /* ioctl */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tsi_calibrate
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****************************************************************************/
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static void tsi_calibrate(void)
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{
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uint32_t regval;
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int i;
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for (i = 0; i < NSENSORS; i++)
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{
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/* Clear end of scan flag */
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regval = getreg32(KL_TSI_GENCS);
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regval |= TSI_GENCS_EOSF;
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putreg32(regval, KL_TSI_GENCS);
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/* Scan the next electrode */
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regval = TSI_DATA_TSICH(g_chsensor[i]);
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putreg32(regval, KL_TSI_DATA);
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regval |= TSI_DATA_SWTS;
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putreg32(regval, KL_TSI_DATA);
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/* Wait until the conversion is done */
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while (!(getreg32(KL_TSI_GENCS) & TSI_GENCS_EOSF));
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g_defcap[i] = getreg32(KL_TSI_DATA) & TSI_DATA_TSICNT_MASK;
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ivdbg("Sensor %d = %d\n", i+1, g_defcap[i]);
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}
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}
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/****************************************************************************
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* Name: tsi_read
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****************************************************************************/
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static ssize_t tsi_read(FAR struct file *filep, FAR char *buf, size_t buflen)
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{
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static int deltacap = 0;
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uint32_t regval;
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if (buf == NULL || buflen < 1)
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{
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/* Well... nothing to do */
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return -EINVAL;
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}
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deltacap = 0;
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/* Clear end of scan flag */
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regval = getreg32(KL_TSI_GENCS);
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regval |= TSI_GENCS_EOSF;
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putreg32(regval, KL_TSI_GENCS);
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/* Scan the next electrode */
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regval = TSI_DATA_TSICH(g_chsensor[g_channel]);
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putreg32(regval, KL_TSI_DATA);
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regval |= TSI_DATA_SWTS;
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putreg32(regval, KL_TSI_DATA);
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/* Wait until the conversion is done*/
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while (!(getreg32(KL_TSI_GENCS) & TSI_GENCS_EOSF));
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/* Compute delta using calibration reference counts */
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deltacap = getreg32(KL_TSI_DATA) & TSI_DATA_TSICNT_MASK;
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deltacap -= g_defcap[g_channel];
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if (deltacap < 0)
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{
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deltacap = 0;
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}
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g_currdelta = (uint16_t)deltacap;
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ivdbg("Delta for g_channel %d = %d\n", g_channel, g_currdelta);
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buf[0] = g_currdelta & 0xff;
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buf[1] = (g_currdelta & 0xff00) >> 8;
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buf[2] = g_channel;
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/* Increment the channel index to sample the next sensor on the next timer
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* that read() is called.
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*/
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g_channel++;
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if (g_channel >= NSENSORS)
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{
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g_channel = 0;
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}
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return 3;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: kl_tsi_initialize
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*
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* Description:
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* Initialize the TSI hardware and interface for the sliders on board the
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* Freedom KL25Z board. Register a character driver at /dev/tsi that may
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* be used to read from each sensor.
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*
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****************************************************************************/
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void kl_tsi_initialize(void)
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{
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uint32_t regval;
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/* Enable access to the TSI module */
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regval = getreg32(KL_SIM_SCGC5);
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regval |= SIM_SCGC5_TSI;
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putreg32(regval, KL_SIM_SCGC5);
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/* Configure PINs used on TSI */
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kl_configgpio(PIN_TSI0_CH9);
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kl_configgpio(PIN_TSI0_CH10);
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/* Configure TSI parameter */
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regval = getreg32(KL_TSI_GENCS);
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regval |= TSI_GENCS_MODE_CAPSENSING | TSI_GENCS_REFCHRG_8UA |
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TSI_GENCS_DVOLT_1p03V | TSI_GENCS_EXTCHRG_64A |
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TSI_GENCS_PS_DIV16 | TSI_GENCS_NSCN_TIMES(12) | TSI_GENCS_STPE;
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putreg32(regval, KL_TSI_GENCS);
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/* Only after setting TSI we should enable it */
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regval = getreg32(KL_TSI_GENCS);
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regval |= TSI_GENCS_TSIEN;
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putreg32(regval, KL_TSI_GENCS);
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/* Calibrate it before to use */
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tsi_calibrate();
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/* And finally register the TSI character driver */
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(void)register_driver("/dev/tsi", &tsi_ops, 0444, NULL);
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}
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#endif /* CONFIG_KL_TSI */
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