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/*
ChibiOS/GFX - Copyright (C) 2012, 2013
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/ginput/touch/ADS7843/ginput_lld_mouse_board_olimex_stm32_e407.h
* @brief GINPUT Touch low level driver source for the ADS7843 on an Olimex STM32E407.
*
* @defgroup Mouse Mouse
* @ingroup GINPUT
* @{
*/
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
static const SPIConfig spicfg = {
NULL,
GPIOG,
10,
/* SPI_CR1_BR_2 |*/ SPI_CR1_BR_1 | SPI_CR1_BR_0,
};
/**
* @brief Initialise the board for the touch.
*
* @notapi
*/
static inline void init_board(void) {
spiStart(&SPID2, &spicfg);
}
/**
* @brief Check whether the surface is currently touched
* @return TRUE if the surface is currently touched
*
* @notapi
*/
static inline bool_t getpin_pressed(void) {
return (!palReadPad(GPIOG, 0));
}
/**
* @brief Aquire the bus ready for readings
*
* @notapi
*/
static inline void aquire_bus(void) {
spiAcquireBus(&SPID2);
//TOUCHSCREEN_SPI_PROLOGUE();
palClearPad(GPIOG, 10);
}
/**
* @brief Release the bus after readings
*
* @notapi
*/
static inline void release_bus(void) {
palSetPad(GPIOG, 10);
spiReleaseBus(&SPID2);
//TOUCHSCREEN_SPI_EPILOGUE();
}
/**
* @brief Read a value from touch controller
* @return The value read from the controller
*
* params[in] port The controller port to read.
*
* @notapi
*/
static inline uint16_t read_value(uint16_t port) {
static uint8_t txbuf[3] = {0};
static uint8_t rxbuf[3] = {0};
uint16_t ret;
txbuf[0] = port;
spiExchange(&SPID2, 3, txbuf, rxbuf);
ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
return ret;
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */
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