354 lines
11 KiB
C
354 lines
11 KiB
C
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/************************************************************************************
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* configs/stm3220g-eval/src/up_touchscreen.c
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* arch/arm/src/board/up_touchscreen.c
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*
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* Copyright (C) 2012 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 <errno.h>
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#include <nuttx/i2c.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/stmpe11.h>
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#include <arch/irq.h>
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#include "stm32_internal.h"
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#include "stm3220g-internal.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifdef CONFIG_INPUT_STMPE11
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#ifndef CONFIG_INPUT
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# error "STMPE11 support requires CONFIG_INPUT"
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#endif
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#ifndef CONFIG_STM32_I2C1
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# error "STMPE11 support requires CONFIG_STM32_I2C1"
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#endif
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#ifndef CONFIG_STMPE11_I2C
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# error "Only the STMPE11 I2C interface is supported"
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#endif
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#ifdef CONFIG_STMPE11_SPI
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# error "Only the STMPE11 SPI interface is supported"
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#endif
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#ifndef CONFIG_STMPE11_FREQUENCY
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# define CONFIG_STMPE11_FREQUENCY 100000
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#endif
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#ifndef CONFIG_STMPE11_I2CDEV
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# define CONFIG_STMPE11_I2CDEV 1
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#endif
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#if CONFIG_STMPE11_I2CDEV != 1
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# error "CONFIG_STMPE11_I2CDEV must be one"
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#endif
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#ifndef CONFIG_STMPE11_DEVMINOR
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# define CONFIG_STMPE11_DEVMINOR 0
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#endif
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/* Board definitions ********************************************************/
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/* The STM3220G-EVAL has two STMPE11QTR I/O expanders on board both connected
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* to the STM32 via I2C1. They share a common interrupt line: PI2.
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*
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* STMPE11 U24, I2C address 0x41 (7-bit)
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* ------ ---- ---------------- --------------------------------------------
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* STPE11 PIN BOARD SIGNAL BOARD CONNECTION
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* ------ ---- ---------------- --------------------------------------------
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* Y- TouchScreen_Y- LCD Connector XL
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* X- TouchScreen_X- LCD Connector XR
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* Y+ TouchScreen_Y+ LCD Connector XD
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* X+ TouchScreen_X+ LCD Connector XU
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* IN3 EXP_IO9
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* IN2 EXP_IO10
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* IN1 EXP_IO11
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* IN0 EXP_IO12
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*
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* STMPE11 U29, I2C address 0x44 (7-bit)
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* ------ ---- ---------------- --------------------------------------------
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* STPE11 PIN BOARD SIGNAL BOARD CONNECTION
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* ------ ---- ---------------- --------------------------------------------
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* Y- EXP_IO1
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* X- EXP_IO2
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* Y+ EXP_IO3
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* X+ EXP_IO4
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* IN3 EXP_IO5
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* IN2 EXP_IO6
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* IN1 EXP_IO7
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* IN0 EXP_IO8
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*/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct stm32_stmpe11config_s
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{
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/* Configuration structure as seen by the STMPE11 driver */
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struct stmpe11_config_s config;
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/* Additional private definitions only known to this driver */
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STMPE11_HANDLE handle; /* The STMPE11 driver handle */
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xcpt_t handler; /* The STMPE11 interrupt handler */
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};
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/****************************************************************************
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* Static Function Prototypes
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****************************************************************************/
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/* IRQ/GPIO access callbacks. These operations all hidden behind callbacks
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* to isolate the STMPE11 driver from differences in GPIO
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* interrupt handling by varying boards and MCUs.* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the STMPE11 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 stmpe11_attach(FAR struct stmpe11_config_s *state, xcpt_t isr);
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static void stmpe11_enable(FAR struct stmpe11_config_s *state, bool enable);
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static void stmpe11_clear(FAR struct stmpe11_config_s *state);
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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 STMPE11
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* driver. This structure provides information about the configuration
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* of the STMPE11 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 frequency or X plate resistance values.
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*/
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#ifndef CONFIG_STMPE11_TSC_DISABLE
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static struct stm32_stmpe11config_s g_stmpe11config =
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{
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.config =
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{
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#ifdef CONFIG_STMPE11_I2C
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.address = STMPE11_ADDR1,
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#endif
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.frequency = CONFIG_STMPE11_FREQUENCY,
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#ifdef CONFIG_STMPE11_MULTIPLE
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.irq = STM32_IRQ_EXTI2,
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#endif
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.ctrl1 = (ADC_CTRL1_SAMPLE_TIME_80 | ADC_CTRL1_MOD_12B),
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.ctrl2 = ADC_CTRL2_ADC_FREQ_3p25,
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.attach = stmpe11_attach,
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.enable = stmpe11_enable,
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.clear = stmpe11_clear,
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},
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.handler = NULL,
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};
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#endif
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/****************************************************************************
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* Private Functions
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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 STMPE11 driver from differences in GPIO
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* interrupt handling by varying boards and MCUs.
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*
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* attach - Attach the STMPE11 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 stmpe11_attach(FAR struct stmpe11_config_s *state, xcpt_t isr)
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{
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FAR struct stm32_stmpe11config_s *priv = (FAR struct stm32_stmpe11config_s *)state;
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ivdbg("Saving handler %p\n", isr);
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DEBUGASSERT(priv);
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/* Just save the handler. We will use it when EXTI interruptsare enabled */
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priv->handler = isr;
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return OK;
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}
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static void stmpe11_enable(FAR struct stmpe11_config_s *state, bool enable)
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{
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FAR struct stm32_stmpe11config_s *priv = (FAR struct stm32_stmpe11config_s *)state;
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irqstate_t flags;
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/* Attach and enable, or detach and disable. Enabling and disabling GPIO
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* interrupts is a multi-step process so the safest thing is to keep
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* interrupts disabled during the reconfiguratino.
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*/
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flags = irqsave();
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if (enable)
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{
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/* Configure the EXTI interrupt using the SAVED handler */
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(void)stm32_gpiosetevent(GPIO_IO_EXPANDER, true, true, true, priv->handler);
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}
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else
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{
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/* Configure the EXTI interrupt with a NULL handler to disable it */
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(void)stm32_gpiosetevent(GPIO_IO_EXPANDER, false, false, false, NULL);
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}
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irqrestore(flags);
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}
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static void stmpe11_clear(FAR struct stmpe11_config_s *state)
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{
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/* Does nothing */
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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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#ifndef CONFIG_STMPE11_TSC_DISABLE
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FAR struct i2c_dev_s *dev;
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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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/* Check if we are already initialized */
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if (!g_stmpe11config.handle)
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{
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ivdbg("Initializing\n");
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/* Configure the STMPE11 interrupt pin as an input */
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(void)stm32_configgpio(GPIO_IO_EXPANDER);
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/* Get an instance of the I2C interface */
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dev = up_i2cinitialize(CONFIG_STMPE11_I2CDEV);
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if (!dev)
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{
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idbg("Failed to initialize I2C bus %d\n", CONFIG_STMPE11_I2CDEV);
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return -ENODEV;
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}
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/* Instantiate the STMPE11 driver */
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g_stmpe11config.handle =
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stmpe11_instantiate(dev, (FAR struct stmpe11_config_s *)&g_stmpe11config);
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if (!g_stmpe11config.handle)
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{
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idbg("Failed to instantiate the STMPE11 driver\n");
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return -ENODEV;
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}
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/* Initialize and register the I2C touchscreen device */
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ret = stmpe11_register(g_stmpe11config.handle, CONFIG_STMPE11_DEVMINOR);
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if (ret < 0)
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{
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idbg("Failed to register STMPE driver: %d\n", ret);
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/* up_i2cuninitialize(dev); */
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return -ENODEV;
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}
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}
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return OK;
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#else
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return -ENOSYS;
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#endif
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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 STMPE11 device yet */
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}
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#endif /* CONFIG_INPUT_STMPE11 */
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