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/*
ChibiOS/GFX - Copyright (C) 2012
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS/GFX.
ChibiOS/GFX 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/GFX 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 drivers/touchscreen/MCU/touchscreen_lld.c
* @brief Touchscreen Driver subsystem low level driver source.
*
* @addtogroup TOUCHSCREEN
* @{
*/
#include "ch.h"
#include "hal.h"
#include "touchscreen.h"
#if GFX_USE_TOUCHSCREEN /*|| defined(__DOXYGEN__)*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
#if !defined(__DOXYGEN__)
/* Local copy of the current touchpad driver */
static const TouchscreenDriver *tsDriver;
#endif
/**
* @brief Low level Touchscreen driver initialization.
*
* @param[in] ts The touchscreen driver struct
*
* @notapi
*/
void ts_lld_init(const TouchscreenDriver *ts) {
tsDriver = ts;
/* set pins to analog input */
palSetPadMode(ts->ts_yd_port, ts->ts_yd_pin, PAL_MODE_INPUT_ANALOG);
palSetPadMode(ts->ts_yu_port, ts->ts_yu_pin, PAL_MODE_INPUT_ANALOG);
palSetPadMode(ts->ts_xl_port, ts->ts_xl_pin, PAL_MODE_INPUT_ANALOG);
palSetPadMode(ts->ts_xr_port, ts->ts_xr_pin, PAL_MODE_INPUT_ANALOG);
}
/**
* @brief Reads a conversion from the touchscreen
*
* @param[in] cmd The command bits to send to the touchscreen
*
* @return The read value 12-bit right-justified
*
* @note This function only reads data, it is assumed that the pins are
* configured properly and the bus has been acquired beforehand
*
* @notapi
*/
uint16_t ts_lld_read_value(uint8_t cmd) {
return 0;
}
/**
* @brief 7-point median filtering code for touchscreen samples
*
* @note This is an internally used routine only.
*
* @notapi
*/
static void ts_lld_filter(void) {
return 0;
}
/**
* @brief Reads out the X direction.
*
* @note The samples are median filtered for greater noise reduction
*
* @notapi
*/
uint16_t ts_lld_read_x(void) {
return 0;
}
/**
* @brief Reads out the Y direction.
*
* @notapi
*/
uint16_t ts_lld_read_y(void) {
return 0;
}
/*
* @brief Checks if touchscreen is pressed or not.
*
* @return 1 if pressed, 0 otherwise
*
* @notapi
*/
uint8_t ts_lld_pressed(void) {
return 0;
}
#endif /* GFX_USE_TOUCHSCREEN */
/** @} */
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