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353 lines
11 KiB
353 lines
11 KiB
/************************************************************************************ |
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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/stmpe811.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_STMPE811 |
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#ifndef CONFIG_INPUT |
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# error "STMPE811 support requires CONFIG_INPUT" |
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#endif |
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#ifndef CONFIG_STM32_I2C1 |
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# error "STMPE811 support requires CONFIG_STM32_I2C1" |
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#endif |
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#ifndef CONFIG_STMPE811_I2C |
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# error "Only the STMPE811 I2C interface is supported" |
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#endif |
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#ifdef CONFIG_STMPE811_SPI |
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# error "Only the STMPE811 SPI interface is supported" |
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#endif |
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#ifndef CONFIG_STMPE811_FREQUENCY |
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# define CONFIG_STMPE811_FREQUENCY 100000 |
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#endif |
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#ifndef CONFIG_STMPE811_I2CDEV |
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# define CONFIG_STMPE811_I2CDEV 1 |
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#endif |
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#if CONFIG_STMPE811_I2CDEV != 1 |
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# error "CONFIG_STMPE811_I2CDEV must be one" |
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#endif |
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#ifndef CONFIG_STMPE811_DEVMINOR |
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# define CONFIG_STMPE811_DEVMINOR 0 |
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#endif |
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/* Board definitions ********************************************************/ |
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/* The STM3220G-EVAL has two STMPE811QTR 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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* STMPE811 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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* STMPE811 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_stmpe811config_s |
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{ |
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/* Configuration structure as seen by the STMPE811 driver */ |
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struct stmpe811_config_s config; |
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/* Additional private definitions only known to this driver */ |
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STMPE811_HANDLE handle; /* The STMPE811 driver handle */ |
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xcpt_t handler; /* The STMPE811 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 STMPE811 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 STMPE811 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 stmpe811_attach(FAR struct stmpe811_config_s *state, xcpt_t isr); |
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static void stmpe811_enable(FAR struct stmpe811_config_s *state, bool enable); |
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static void stmpe811_clear(FAR struct stmpe811_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 STMPE811 |
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* driver. This structure provides information about the configuration |
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* of the STMPE811 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_STMPE811_TSC_DISABLE |
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static struct stm32_stmpe811config_s g_stmpe811config = |
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{ |
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.config = |
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{ |
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#ifdef CONFIG_STMPE811_I2C |
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.address = STMPE811_ADDR1, |
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#endif |
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.frequency = CONFIG_STMPE811_FREQUENCY, |
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#ifdef CONFIG_STMPE811_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 = stmpe811_attach, |
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.enable = stmpe811_enable, |
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.clear = stmpe811_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 STMPE811 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 STMPE811 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 stmpe811_attach(FAR struct stmpe811_config_s *state, xcpt_t isr) |
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{ |
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FAR struct stm32_stmpe811config_s *priv = (FAR struct stm32_stmpe811config_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 stmpe811_enable(FAR struct stmpe811_config_s *state, bool enable) |
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{ |
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FAR struct stm32_stmpe811config_s *priv = (FAR struct stm32_stmpe811config_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 stmpe811_clear(FAR struct stmpe811_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_STMPE811_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_stmpe811config.handle) |
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{ |
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ivdbg("Initializing\n"); |
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/* Configure the STMPE811 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_STMPE811_I2CDEV); |
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if (!dev) |
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{ |
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idbg("Failed to initialize I2C bus %d\n", CONFIG_STMPE811_I2CDEV); |
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return -ENODEV; |
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} |
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/* Instantiate the STMPE811 driver */ |
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g_stmpe811config.handle = |
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stmpe811_instantiate(dev, (FAR struct stmpe811_config_s *)&g_stmpe811config); |
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if (!g_stmpe811config.handle) |
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{ |
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idbg("Failed to instantiate the STMPE811 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 = stmpe811_register(g_stmpe811config.handle, CONFIG_STMPE811_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 STMPE811 device yet */ |
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} |
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#endif /* CONFIG_INPUT_STMPE811 */ |
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