/************************************************************************************
* configs/hymini-stm32v/src/up_ts.c
* arch/arm/src/board/up_ts.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
* Laurent Latil <laurent@latil.nom.fr>
*
* 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.
*
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/spi.h>
#include <nuttx/arch.h>
#include <errno.h>
#include <debug.h>
#include "stm32.h"
#include "hymini_stm32v-internal.h"
#include <nuttx/input/touchscreen.h>
#include <nuttx/input/ads7843e.h>
#if !defined(CONFIG_STM32_SPI1)
# error CONFIG_STM32_SPI1 must be defined to use the ADS7843 on this board
#endif
static int hymini_ts_irq_attach(FAR struct ads7843e_config_s *state, xcpt_t isr);
static void hymini_ts_irq_enable(FAR struct ads7843e_config_s *state,
bool enable);
static void hymini_ts_irq_clear(FAR struct ads7843e_config_s *state);
static bool hymini_ts_busy(FAR struct ads7843e_config_s *state);
static bool hymini_ts_pendown(FAR struct ads7843e_config_s *state);
/************************************************************************************
* Private Data
************************************************************************************/
static FAR struct ads7843e_config_s ts_cfg =
{
.frequency = CONFIG_ADS7843E_FREQUENCY,
.attach = hymini_ts_irq_attach,
.enable=hymini_ts_irq_enable,
.clear=hymini_ts_irq_clear,
.busy = hymini_ts_busy,
.pendown=hymini_ts_pendown
};
static xcpt_t tc_isr;
/************************************************************************************
* Private Functions
************************************************************************************/
/* Attach the ADS7843E interrupt handler to the GPIO interrupt */
static int hymini_ts_irq_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
{
ivdbg("hymini_ts_irq_attach\n");
tc_isr = isr;
stm32_gpiosetevent(GPIO_TS_IRQ, true, true, true, isr);
return OK;
}
/* Enable or disable the GPIO interrupt */
static void hymini_ts_irq_enable(FAR struct ads7843e_config_s *state,
bool enable)
{
illvdbg("%d\n", enable);
stm32_gpiosetevent(GPIO_TS_IRQ, true, true, true, enable? tc_isr:NULL);
}
/* Acknowledge/clear any pending GPIO interrupt */
static void hymini_ts_irq_clear(FAR struct ads7843e_config_s *state)
{
// FIXME Nothing to do ?
}
/* As the busy line is not connected, we just wait a little bit here */
static bool hymini_ts_busy(FAR struct ads7843e_config_s *state)
{
up_mdelay(50);
return false;
}
/* Return the state of the pen down GPIO input */
static bool hymini_ts_pendown(FAR struct ads7843e_config_s *state)
{
bool pin_value = stm32_gpioread(GPIO_TS_IRQ);
return !pin_value;
}
/****************************************************************************
* 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)
{
FAR struct spi_dev_s *dev;
idbg("minor %d\n", minor);
dev = up_spiinitialize(1);
if (!dev)
{
idbg("Failed to initialize SPI bus\n");
return -ENODEV;
}
/* Configure the PIO interrupt */
stm32_configgpio(GPIO_TS_IRQ);
return ads7843e_register(dev, &ts_cfg, minor);
}
/****************************************************************************
* 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)
{
/* FIXME What can/should we do here ? */
}
