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Diffstat (limited to 'nuttx/configs/stm3240g-eval/src/up_stmpe811.c')
| -rw-r--r-- | nuttx/configs/stm3240g-eval/src/up_stmpe811.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/nuttx/configs/stm3240g-eval/src/up_stmpe811.c b/nuttx/configs/stm3240g-eval/src/up_stmpe811.c new file mode 100644 index 000000000..a64d62825 --- /dev/null +++ b/nuttx/configs/stm3240g-eval/src/up_stmpe811.c @@ -0,0 +1,353 @@ +/************************************************************************************ + * configs/stm3240g-eval/src/up_touchscreen.c + * arch/arm/src/board/up_touchscreen.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdbool.h> +#include <stdio.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/i2c.h> +#include <nuttx/input/touchscreen.h> +#include <nuttx/input/stmpe811.h> + +#include <arch/irq.h> + +#include "stm32_internal.h" +#include "stm3240g-internal.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ + +#ifdef CONFIG_INPUT_STMPE811 +#ifndef CONFIG_INPUT +# error "STMPE811 support requires CONFIG_INPUT" +#endif + +#ifndef CONFIG_STM32_I2C1 +# error "STMPE811 support requires CONFIG_STM32_I2C1" +#endif + +#ifndef CONFIG_STMPE811_I2C +# error "Only the STMPE811 I2C interface is supported" +#endif + +#ifdef CONFIG_STMPE811_SPI +# error "Only the STMPE811 SPI interface is supported" +#endif + +#ifndef CONFIG_STMPE811_FREQUENCY +# define CONFIG_STMPE811_FREQUENCY 100000 +#endif + +#ifndef CONFIG_STMPE811_I2CDEV +# define CONFIG_STMPE811_I2CDEV 1 +#endif + +#if CONFIG_STMPE811_I2CDEV != 1 +# error "CONFIG_STMPE811_I2CDEV must be one" +#endif + +#ifndef CONFIG_STMPE811_DEVMINOR +# define CONFIG_STMPE811_DEVMINOR 0 +#endif + +/* Board definitions ********************************************************/ +/* The STM3240G-EVAL has two STMPE811QTR I/O expanders on board both connected + * to the STM32 via I2C1. They share a common interrupt line: PI2. + * + * STMPE811 U24, I2C address 0x41 (7-bit) + * ------ ---- ---------------- -------------------------------------------- + * STPE11 PIN BOARD SIGNAL BOARD CONNECTION + * ------ ---- ---------------- -------------------------------------------- + * Y- TouchScreen_Y- LCD Connector XL + * X- TouchScreen_X- LCD Connector XR + * Y+ TouchScreen_Y+ LCD Connector XD + * X+ TouchScreen_X+ LCD Connector XU + * IN3 EXP_IO9 + * IN2 EXP_IO10 + * IN1 EXP_IO11 + * IN0 EXP_IO12 + * + * STMPE811 U29, I2C address 0x44 (7-bit) + * ------ ---- ---------------- -------------------------------------------- + * STPE11 PIN BOARD SIGNAL BOARD CONNECTION + * ------ ---- ---------------- -------------------------------------------- + * Y- EXP_IO1 + * X- EXP_IO2 + * Y+ EXP_IO3 + * X+ EXP_IO4 + * IN3 EXP_IO5 + * IN2 EXP_IO6 + * IN1 EXP_IO7 + * IN0 EXP_IO8 + */ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct stm32_stmpe811config_s +{ + /* Configuration structure as seen by the STMPE811 driver */ + + struct stmpe811_config_s config; + + /* Additional private definitions only known to this driver */ + + STMPE811_HANDLE handle; /* The STMPE811 driver handle */ + xcpt_t handler; /* The STMPE811 interrupt handler */ +}; + +/**************************************************************************** + * Static Function Prototypes + ****************************************************************************/ + +/* IRQ/GPIO access callbacks. These operations all hidden behind callbacks + * to isolate the STMPE811 driver from differences in GPIO + * interrupt handling by varying boards and MCUs.* so that contact and loss-of-contact events can be detected. + * + * attach - Attach the STMPE811 interrupt handler to the GPIO interrupt + * enable - Enable or disable the GPIO interrupt + * clear - Acknowledge/clear any pending GPIO interrupt + */ + +static int stmpe811_attach(FAR struct stmpe811_config_s *state, xcpt_t isr); +static void stmpe811_enable(FAR struct stmpe811_config_s *state, bool enable); +static void stmpe811_clear(FAR struct stmpe811_config_s *state); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/* A reference to a structure of this type must be passed to the STMPE811 + * driver. This structure provides information about the configuration + * of the STMPE811 and provides some board-specific hooks. + * + * Memory for this structure is provided by the caller. It is not copied + * by the driver and is presumed to persist while the driver is active. The + * memory must be writable because, under certain circumstances, the driver + * may modify frequency or X plate resistance values. + */ + +#ifndef CONFIG_STMPE811_TSC_DISABLE +static struct stm32_stmpe811config_s g_stmpe811config = +{ + .config = + { +#ifdef CONFIG_STMPE811_I2C + .address = STMPE811_ADDR1, +#endif + .frequency = CONFIG_STMPE811_FREQUENCY, + +#ifdef CONFIG_STMPE811_MULTIPLE + .irq = STM32_IRQ_EXTI2, +#endif + .ctrl1 = (ADC_CTRL1_SAMPLE_TIME_80 | ADC_CTRL1_MOD_12B), + .ctrl2 = ADC_CTRL2_ADC_FREQ_3p25, + + .attach = stmpe811_attach, + .enable = stmpe811_enable, + .clear = stmpe811_clear, + }, + .handler = NULL, +}; +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/* IRQ/GPIO access callbacks. These operations all hidden behind + * callbacks to isolate the STMPE811 driver from differences in GPIO + * interrupt handling by varying boards and MCUs. + * + * attach - Attach the STMPE811 interrupt handler to the GPIO interrupt + * enable - Enable or disable the GPIO interrupt + * clear - Acknowledge/clear any pending GPIO interrupt + */ + +static int stmpe811_attach(FAR struct stmpe811_config_s *state, xcpt_t isr) +{ + FAR struct stm32_stmpe811config_s *priv = (FAR struct stm32_stmpe811config_s *)state; + + ivdbg("Saving handler %p\n", isr); + DEBUGASSERT(priv); + + /* Just save the handler. We will use it when EXTI interruptsare enabled */ + + priv->handler = isr; + return OK; +} + +static void stmpe811_enable(FAR struct stmpe811_config_s *state, bool enable) +{ + FAR struct stm32_stmpe811config_s *priv = (FAR struct stm32_stmpe811config_s *)state; + irqstate_t flags; + + /* Attach and enable, or detach and disable. Enabling and disabling GPIO + * interrupts is a multi-step process so the safest thing is to keep + * interrupts disabled during the reconfiguratino. + */ + + flags = irqsave(); + if (enable) + { + /* Configure the EXTI interrupt using the SAVED handler */ + + (void)stm32_gpiosetevent(GPIO_IO_EXPANDER, true, true, true, priv->handler); + } + else + { + /* Configure the EXTI interrupt with a NULL handler to disable it */ + + (void)stm32_gpiosetevent(GPIO_IO_EXPANDER, false, false, false, NULL); + } + irqrestore(flags); +} + +static void stmpe811_clear(FAR struct stmpe811_config_s *state) +{ + /* Does nothing */ +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: arch_tcinitialize + * + * Description: + * Each board that supports a touchscreen device must provide this function. + * This function is called by application-specific, setup logic to + * configure the touchscreen device. This function will register the driver + * as /dev/inputN where N is the minor device number. + * + * Input Parameters: + * minor - The input device minor number + * + * Returned Value: + * Zero is returned on success. Otherwise, a negated errno value is + * returned to indicate the nature of the failure. + * + ****************************************************************************/ + +int arch_tcinitialize(int minor) +{ +#ifndef CONFIG_STMPE811_TSC_DISABLE + FAR struct i2c_dev_s *dev; + int ret; + + idbg("minor %d\n", minor); + DEBUGASSERT(minor == 0); + + /* Check if we are already initialized */ + + if (!g_stmpe811config.handle) + { + ivdbg("Initializing\n"); + + /* Configure the STMPE811 interrupt pin as an input */ + + (void)stm32_configgpio(GPIO_IO_EXPANDER); + + /* Get an instance of the I2C interface */ + + dev = up_i2cinitialize(CONFIG_STMPE811_I2CDEV); + if (!dev) + { + idbg("Failed to initialize I2C bus %d\n", CONFIG_STMPE811_I2CDEV); + return -ENODEV; + } + + /* Instantiate the STMPE811 driver */ + + g_stmpe811config.handle = + stmpe811_instantiate(dev, (FAR struct stmpe811_config_s *)&g_stmpe811config); + if (!g_stmpe811config.handle) + { + idbg("Failed to instantiate the STMPE811 driver\n"); + return -ENODEV; + } + + /* Initialize and register the I2C touchscreen device */ + + ret = stmpe811_register(g_stmpe811config.handle, CONFIG_STMPE811_DEVMINOR); + if (ret < 0) + { + idbg("Failed to register STMPE driver: %d\n", ret); + /* up_i2cuninitialize(dev); */ + return -ENODEV; + } + } + + return OK; +#else + return -ENOSYS; +#endif +} + +/**************************************************************************** + * Name: arch_tcuninitialize + * + * Description: + * Each board that supports a touchscreen device must provide this function. + * This function is called by application-specific, setup logic to + * uninitialize the touchscreen device. + * + * Input Parameters: + * None + * + * Returned Value: + * None. + * + ****************************************************************************/ + +void arch_tcuninitialize(void) +{ + /* No support for un-initializing the touchscreen STMPE811 device yet */ +} + +#endif /* CONFIG_INPUT_STMPE811 */ + |