Add hooks for the ADS7843E touchscreen controller
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4013 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
parent
7433e0a50d
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@ -50,6 +50,9 @@ endif
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ifeq ($(CONFIG_USBSTRG),y)
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CSRCS += up_usbstrg.c
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endif
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ifeq ($(CONFIG_INPUT_ADS7843E),y)
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CSRCS += up_touchscreen.c
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endif
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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197
configs/sam3u-ek/src/up_touchscreen.c
Executable file
197
configs/sam3u-ek/src/up_touchscreen.c
Executable file
@ -0,0 +1,197 @@
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/************************************************************************************
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* configs/sam3u-ek/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) 2011 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/sdio.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/ads7843e.h>
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#include "sam3u_internal.h"
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#include "sam3uek_internal.h.h"
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/****************************************************************************
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* Pre-Processor Definitions
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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
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* callbacks to isolate the ADS7843E 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 ADS7843E 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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* pendown - Return the state of the pen down GPIO input
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*/
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static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr);
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static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable);
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static void tsc_clear(FAR struct ads7843e_config_s *state);
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static bool tsc_pendown(FAR struct ads7843e_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 ADS7843E
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* driver. This structure provides information about the configuration
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* of the ADS7843E 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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static struct ads7843e_config_s g_tscinfo =
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{
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.calib = CONFIG_INPUT_TSCCALIB,
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.frequency = CONFIG_INPUT_TSCFREQUENCY,
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.attach = tsc_attach,
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.enable = tsc_enable,
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.clear = tsc_clear,
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.pendown = tsc_pendown,
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};
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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 ADS7843E 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 ADS7843E 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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* pendown - Return the state of the pen down GPIO input
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*/
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static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
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{
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#warning "Missing logic"
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return OK;
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}
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static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
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{
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/* Attach and enable, or detach and disable */
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if (enable && g_tschandler)
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{
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/* Configure and enable the ADS7843E interrupt */
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#warning "Missing logic"
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}
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else
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{
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#warning "Missing logic"
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}
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}
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static void tsc_clear(FAR struct ads7843e_config_s *state)
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{
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/* Does nothing */
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}
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static bool tsc_pendown(FAR struct ads7843e_config_s *state)
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{
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/* REVISIT: This might need to be inverted */
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return sam3u_gpioread(GPIO_ADS7843E);
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}
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#endif /* HAVE_TOUCHSCREEN */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_tcinitialize
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*
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* Description:
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* Initialize the touchscreen device
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*
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****************************************************************************/
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int up_tcinitialize(void)
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{
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FAR struct spi_dev_s *dev;
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int ret;
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/* Configure and enable the ADS7843E interrupt pin as an input */
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(void)sam3u_configgpio(GPIO_ADS7843E_BUY);
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(void)sam3u_configgpio(GPIO_ADS7843E_IRQ);
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/* Get an instance of the SPI interface */
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dev = up_spiinitialize(CONFIG_INPUT_TSCSPIDEV);
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if (!dev)
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{
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dbg("Failed to initialize SPI bus %d\n", CONFIG_INPUT_TSCSPIDEV);
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return -ENODEV;
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}
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/* Initialize and register the SPI touschscreen device */
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ret = ads7843e_register(dev, &g_tscinfo, CONFIG_INPUT_TSCMINOR);
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if (ret < 0)
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{
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dbg("Failed to initialize SPI bus %d\n", CONFIG_INPUT_TSCSPIDEV);
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/* up_spiuninitialize(dev); */
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return -ENODEV;
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}
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return OK;
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}
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