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added ADS7843 touchpad driver

ugfx_release_2.6
Tectu 2012-08-09 09:31:07 +02:00
parent b8e412e066
commit 883b9345b4
4 changed files with 211 additions and 0 deletions
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9
halext/drivers/touchpad/touchpadADS7843/readme.txt 100644
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To use this driver:
1. Add in your halconf.h:
a) #define HAL_USE_TOUCHPAD TRUE
2. To your makefile add the following lines:
include $(LCDLIB)/lcd.mk
include $(LCDLIB)/halext/drivers/touchpad/touchpadADS7843/touchpad_lld.mk

152
halext/drivers/touchpad/touchpadADS7843/touchpad_lld.c 100644
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/*
ChibiOS-LCD-Driver - Copyright (C) 2012
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS-LCD-Driver.
ChibiOS-LCD-Driver is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS-LCD-Driver is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file touchpadADS7843/touchpad_lld.c
* @brief Touchpad Driver subsystem low level driver source.
*
* @addtogroup TOUCHPAD
* @{
*/
#include "ch.h"
#include "hal.h"
#include "touchpad.h"
#if HAL_USE_TOUCHPAD || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#define TP_CS_HIGH palSetPad(TP_CS_PORT, TP_CS)
#define TP_CS_LOW palClearPad(TP_CS_PORT, TP_CS)
#ifdef UNUSED
#elif defined(__GNUC__)
# define UNUSED(x) UNUSED_ ## x __attribute__((unused))
#elif defined(__LCLINT__)
# define UNUSED(x) /*@unused@*/ x
#else
# define UNUSED(x) x
#endif
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
#if !defined(__DOXYGEN__)
TOUCHPADDriver Touchpad;
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
static const SPIConfig spicfg = {
NULL,
TP_CS_PORT,
TP_CS,
SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0,
};
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/* ---- Required Routines ---- */
/**
* @brief Low level Touchpad driver initialization.
*
* @notapi
*/
void tp_lld_init(TOUCHPADDriver *tp) {
spiStart(tp->spid, &spicfg);
}
/**
* @brief Reads out the X direction.
*
* @notapi
*/
uint16_t tp_lld_read_x(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t y;
txbuf[0] = 0xd0;
TP_CS_LOW;
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
TP_CS_HIGH;
y = rxbuf[0] << 4;
y |= rxbuf[1] >> 4;
return y;
}
/*
* @brief Reads out the X direction.
*
* @notapi
*/
uint16_t tp_lld_read_y(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t y;
txbuf[0] = 0x90;
TP_CS_LOW;
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
TP_CS_HIGH;
y = rxbuf[0] << 4;
y |= rxbuf[1] >> 4;
return y;
}
/* ---- Optional Routines ---- */
#if TOUCHPAD_HAS_IRQ || defined(__DOXYGEN__)
/*
* @brief for checking if touchpad is pressed or not.
*
* @return 1 if pressed / 0 if not pressed
*
* @noapi
*/
uint8_t tp_lld_irq(void) {
return (!palReadPad(TP_IRQ_PORT, TP_IRQ));
}
#endif
#endif /* HAL_USE_TOUCHPAD */
/** @} */

6
halext/drivers/touchpad/touchpadADS7843/touchpad_lld.mk 100644
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# List the required driver.
HALSRC += $(LCDLIB)/halext/drivers/touchpad/touchpadADS7843/touchpad_lld.c
# Required include directories
HALINC += $(LCDLIB)/halext/drivers/touchpad/touchpadADS7843

44
halext/drivers/touchpad/touchpadADS7843/touchpad_lld_config.h 100644
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/*
ChibiOS-LCD-Driver - Copyright (C) 2012
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS-LCD-Driver.
ChibiOS-LCD-Driver is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS-LCD-Driver is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file touchpadADS7843/touchpad_lld_config.h
* @brief Touchpad Driver subsystem low level driver.
*
* @addtogroup TOUCHPAD
* @{
*/
#ifndef _TOUCHPAD_LLD_CONFIG_H
#define _TOUCHPAD_LLD_CONFIG_H
#if HAL_USE_TOUCHPAD || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver hardware support. */
/*===========================================================================*/
#define TOUCHPAD_HAS_IRQ TRUE
#define TOUCHPAD_HAS_PRESSURE FALSE
#endif /* HAL_USE_TOUCHPAD */
#endif /* _TOUCHPAD_LLD_CONFIG_H */
/** @} */