SAMA5D4-EK: Add board support for the maXTouch
This commit is contained in:
Gregory Nutt
parent
cbe4d3573d
commit
5e98d5d2e8
@ -174,6 +174,18 @@ config SAMA5D4EK_AT25_NXFFS
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endchoice # AT25 serial FLASH configuration
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if INPUT_MXT
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config SAMA5D4EK_MXT_I2CFREQUENCY
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int "maXTouch I2C frequency"
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default 100000
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config SAMA5D4EK_MXT_DEVMINOR
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int "/dev/input minor number"
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default 0
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endif # INPUT_MXT
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config SAMA5D4EK_CHANNEL
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int "PWM channel number"
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default 0 if SAMA5_PWM_CHAN0
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@ -92,6 +92,7 @@ Contents
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- Watchdog Timer
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- TRNG and /dev/random
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- I2S Audio Support
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- TM7000 LCD/Touchscreen
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- SAMA4D4-EK Configuration Options
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- Configurations
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- To-Do List
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@ -2771,6 +2772,36 @@ I2S Audio Support
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Library Routines
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CONFIG_SCHED_WORKQUEUE=y : Driver needs work queue support
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TM7000 LCD/Touchscreen
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======================
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The TM7000 LCD is available for the SAMA5D4-EK. See documentation
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available on the Precision Design Associates website:
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http://www.pdaatl.com/doc/tm7000.pdf
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The TM7000 features an touchscreen controol
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- 7 inch LCD at 800x480 18-bit RGB resolution and white backlight
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- Projected Capacitive Multi-Touch Controller based on the Atmel
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MXT768E maXTouch™ IC
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- 4 Capacitive “Navigation” Keys available via an Atmel AT42QT1070
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QTouch™ Button Sensor IC
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- 200 bytes of non-volatile serial EEPROM
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Both the MXT768E and the AT42QT1070 are I2C devices with interrupting
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PIO pins:
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------------------------ -----------------
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SAMA5D4-EK TM7000
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------------------------ -----------------
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J9 pin 5 LCD_PE24 J4 pin 5 ~CHG_mxt
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J9 pin 6 LCD_PE25 J4 pin 6 ~CHG_QT
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J9 pin 7 LCD_TWCK0_PA31 J4 pin 7 SCL_0
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J9 pin 8 LCD_TWD0_PA30 J4 pin 8 SDA_0
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------------------------ -----------------
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The schematic indicates the the MXT468E address is 0x4c/0x4d.
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SAMA4D4-EK Configuration Options
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=================================
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@ -96,6 +96,10 @@ ifeq ($(CONFIG_SAMA5_EMACB),y)
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CSRCS += sam_ethernet.c
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endif
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ifeq ($(CONFIG_INPUT_MXT),y)
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CSRCS += sam_maxtouch.c
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endif
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ifeq ($(CONFIG_NSH_ARCHINIT),y)
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CSRCS += sam_nsh.c
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endif
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315
configs/sama5d4-ek/src/sam_maxtouch.c
Normal file
315
configs/sama5d4-ek/src/sam_maxtouch.c
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@ -0,0 +1,315 @@
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/************************************************************************************
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* configs/sama5d4-ek/src/sam_maxtouch.c
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*
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* Copyright (C) 2014 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 <stdbool.h>
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#include <stdio.h>
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#include <debug.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/mxt.h>
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#include "up_arch.h"
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#include "sam_pio.h"
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#include "sam_twi.h"
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#include "sama5d4-ek.h"
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#ifdef HAVE_MAXTOUCH
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_SAMA5D4EK_MXT_I2CFREQUENCY
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# define CONFIG_SAMA5D4EK_MXT_I2CFREQUENCY 500000
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#endif
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#ifndef CONFIG_SAMA5D4EK_MXT_DEVMINOR
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# define CONFIG_SAMA5D4EK_MXT_DEVMINOR 0
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#endif
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/* The touchscreen communicates on TWI0 */
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#define MXT_BUSNUM 0
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct sama5d4ek_tscinfo_s
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{
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/* Standard maXTouch interface */
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struct mxt_lower_s lower;
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/* Extensions for the sama5d4ek board */
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mxt_handler_t handler;
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FAR void *arg;
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* IRQ/GPIO access callbacks. These operations all hidden behind
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* callbacks to isolate the maXTouch driver from differences in GPIO
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* interrupt handling by varying boards and MCUs. If possible,
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* interrupts should be configured on both rising and falling edges
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* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the maXTouch interrupt handler to the GPIO interrupt
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* enable - Enable or disable the GPIO interrupt
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* clear - Acknowledge/clear any pending GPIO interrupt
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*/
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static int mxt_attach(FAR const struct mxt_lower_s *lower, mxt_handler_t isr,
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FAR void *arg);
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static void mxt_enable(FAR const struct mxt_lower_s *lower, bool enable);
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static void mxt_clear(FAR const struct mxt_lower_s *lower);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* A reference to a structure of this type must be passed to the maXTouch
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* driver. This structure provides information about the configuration
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* of the maXTouch and provides some board-specific hooks.
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*
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* Memory for this structure is provided by the caller. It is not copied
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* by the driver and is presumed to persist while the driver is active. The
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* memory must be writable because, under certain circumstances, the driver
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* may modify certain values.
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*/
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static struct sama5d4ek_tscinfo_s g_mxtinfo =
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{
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.lower =
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{
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.frequency = CONFIG_SAMA5D4EK_MXT_I2CFREQUENCY,
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.attach = mxt_attach,
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.enable = mxt_enable,
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.clear = mxt_clear,
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},
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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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* IRQ/GPIO access callbacks. These operations all hidden behind
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* callbacks to isolate the maXTouch driver from differences in GPIO
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* interrupt handling by varying boards and MCUs. If possible,
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* interrupts should be configured on both rising and falling edges
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* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the maXTouch interrupt handler to the GPIO interrupt
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* enable - Enable or disable the GPIO interrupt
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* clear - Acknowledge/clear any pending GPIO interrupt
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*
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****************************************************************************/
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static int mxt_attach(FAR const struct mxt_lower_s *lower, mxt_handler_t isr,
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FAR void *arg)
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{
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if (isr)
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{
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/* Just save the address of the handler for now. The new handler will
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* be attached when the interrupt is next enabled.
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*/
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ivdbg("Attaching %p\n", isr);
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g_mxtinfo.handler = isr;
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g_mxtinfo.arg = arg;
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}
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else
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{
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ivdbg("Detaching %p\n", g_mxtinfo.handler);
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mxt_enable(lower, false);
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g_mxtinfo.handler = NULL;
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g_mxtinfo.arg = NULL;
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}
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return OK;
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}
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static void mxt_enable(FAR const struct mxt_lower_s *lower, bool enable)
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{
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/* Enable or disable interrupts */
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if (enable && g_mxtinfo.handler)
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{
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sam_pioirqenable(IRQ_CHG_MXT);
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}
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else
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{
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sam_pioirqdisable(IRQ_CHG_MXT);
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}
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}
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static void mxt_clear(FAR const struct mxt_lower_s *lower)
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{
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/* Does nothing */
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}
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static int mxt_interrupt(int irq, FAR void *context)
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{
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/* Just forward the interrupt to the maXTouch driver */
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if (g_mxtinfo.handler)
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{
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return g_mxtinfo.handler(&g_mxtinfo.lower, g_mxtinfo.arg);
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}
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/* We got an interrupt with no handler. This should not
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* happen.
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*/
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sam_pioirqdisable(IRQ_CHG_MXT);
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return OK;
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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: arch_tcinitialize
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*
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* Description:
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* Each board that supports a touchscreen device must provide this function.
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* This function is called by application-specific, setup logic to
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* configure the touchscreen device. This function will register the driver
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* as /dev/inputN where N is the minor device number.
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*
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* Input Parameters:
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* minor - The input device minor number
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*
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* Returned Value:
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* Zero is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int arch_tcinitialize(int minor)
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{
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FAR struct i2c_dev_s *i2c;
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static bool initialized = false;
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int ret;
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idbg("minor %d\n", minor);
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DEBUGASSERT(minor == 0);
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/* Have we already initialized? Since we never uninitialize we must prevent
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* multiple initializations. This is necessary, for example, when the
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* touchscreen example is used as a built-in application in NSH and can be
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* called numerous time. It will attempt to initialize each time.
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*/
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if (!initialized)
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{
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/* Configure the maXTouch CHG interrupt pin */
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(void)sam_configpio(PIO_CHG_MXT);
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/* Get an instance of the I2C interface for the touchscreen chip select */
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i2c = up_i2cinitialize(MXT_BUSNUM);
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if (!i2c)
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{
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idbg("Failed to initialize I2C%d\n", MXT_BUSNUM);
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return -ENODEV;
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}
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/* Configure maXTouch CHG interrupts */
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sam_pioirq(IRQ_CHG_MXT);
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(void)irq_attach(IRQ_CHG_MXT, mxt_interrupt);
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/* Initialize and register the I2C touchscreen device */
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ret = mxt_register(i2c, &g_mxtinfo.lower, CONFIG_SAMA5D4EK_MXT_DEVMINOR);
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if (ret < 0)
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{
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idbg("ERROR: Failed to register touchscreen device\n");
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irq_detach(IRQ_CHG_MXT);
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/* up_i2cuninitialize(i2c); */
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return -ENODEV;
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}
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/* Now we are initialized */
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initialized = true;
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}
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return OK;
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}
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/****************************************************************************
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* Name: arch_tcuninitialize
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*
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* Description:
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* Each board that supports a touchscreen device must provide this function.
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* This function is called by application-specific, setup logic to
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* uninitialize the touchscreen device.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void arch_tcuninitialize(void)
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{
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/* No support for un-initializing the touchscreen maXTouch device. It will
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* continue to run and process touch interrupts in the background.
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*/
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}
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#endif /* HAVE_MAXTOUCH */
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@ -63,6 +63,7 @@
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#define HAVE_USBOVCUR 1
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#define HAVE_USBMONITOR 1
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#define HAVE_NETWORK 1
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#define HAVE_MAXTOUCH 1
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/* HSMCI */
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/* Can't support MMC/SD if the card interface(s) are not enable */
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@ -296,6 +297,24 @@
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# undef HAVE_NETWORK
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#endif
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/* maXTouch controller */
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#ifndef CONFIG_INPUT_MXT
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# undef HAVE_MAXTOUCH
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#endif
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#ifdef HAVE_MAXTOUCH
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# ifndef CONFIG_SAMA5_TWI0
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# warning CONFIG_SAMA5_TWI0 is required for touchscreen support
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# undef HAVE_MAXTOUCH
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# endif
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# ifndef CONFIG_SAMA5_PIOE_IRQ
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# warning PIOE interrupts not enabled. No touchsreen support.
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# undef HAVE_MAXTOUCH
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# endif
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#endif
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/* LEDs *****************************************************************************/
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/* There are 3 LEDs on the SAMA5D4-EK:
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*
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@ -338,6 +357,43 @@
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PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN13)
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#define IRQ_BTN_USER SAM_IRQ_PE13
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/* TM7000 LCD/Touchscreen ***********************************************************/
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/* The TM7000 LCD is available for the SAMA5D4-EK. See documentation
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* available on the Precision Design Associates website:
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* http://www.pdaatl.com/doc/tm7000.pdf
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*
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* The TM7000 features an touchscreen controol
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*
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* - 7 inch LCD at 800x480 18-bit RGB resolution and white backlight
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* - Projected Capacitive Multi-Touch Controller based on the Atmel
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* MXT768E maXTouch™ IC
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* - 4 Capacitive “Navigation” Keys available via an Atmel AT42QT1070
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* QTouch™ Button Sensor IC
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* - 200 bytes of non-volatile serial EEPROM
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*
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* Both the MXT768E and the AT42QT1070 are I2C devices with interrupting
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* PIO pins:
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*
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* ------------------------ -----------------
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* SAMA5D4-EK TM7000
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* ------------------------ -----------------
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* J9 pin 5 LCD_PE24 J4 pin 5 ~CHG_mxt
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* J9 pin 6 LCD_PE25 J4 pin 6 ~CHG_QT
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* J9 pin 7 LCD_TWCK0_PA31 J4 pin 7 SCL_0
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* J9 pin 8 LCD_TWD0_PA30 J4 pin 8 SDA_0
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* ------------------------ -----------------
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*
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* The schematic indicates the the MXT468E address is 0x4c/0x4d.
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*/
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#define PIO_CHG_MXT (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
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PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN24)
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#define IRQ_CHG_MXT SAM_IRQ_PE24
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#define PIO_CHG_QT (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
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PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN25)
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#define IRQ_CHG_QT SAM_IRQ_PE25
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/* HSMCI Card Slots *****************************************************************/
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/* The SAMA4D4-EK provides a two SD memory card slots: (1) a full size SD
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* card slot (J10), and (2) a microSD memory card slot (J11).
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