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ginput/touch/MCU Olimex STM32 LCD board file

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Joel Bodenmann 2012-11-29 01:21:36 +01:00
parent 62dee0d351
commit 5bfa0f2622
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drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h Normal file
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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/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h
* @brief GINPUT Touch low level driver source for the MCU on the example board.
*
* @addtogroup GINPUT_MOUSE
* @{
*/
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
#define ADC_NUM_CHANNELS 2
#define ADC_BUF_DEPTH 1
static const ADCConversionGroup adc_y_config = {
FALSE,
ADC_NUM_CHANNELS,
NULL,
NULL,
0, 0,
0, 0,
ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
0,
ADC_SQR3_SQ2_N(ADC_CHANNEL_IN12) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN13)
};
static const ADCConversionGroup adc_x_config = {
FALSE,
ADC_NUM_CHANNELS,
NULL,
NULL,
0, 0,
0, 0,
ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
0,
ADC_SQR3_SQ2_N(ADC_CHANNEL_IN10) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN11)
};
/**
* @brief Initialise the board for the touch.
*
* @notapi
*/
static __inline void init_board(void) {
adcStart(&ADCD1, NULL);
}
/**
* @brief Check whether the surface is currently touched
* @return TRUE if the surface is currently touched
*
* @notapi
*/
static __inline bool_t getpin_pressed(void) {
palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOC, 1, PAL_MODE_INPUT);
palSetPadMode(GPIOC, 2, PAL_MODE_INPUT);
palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL);
palSetPad(GPIOC, 3);
return palReadPad(GPIOC, 0);
}
/**
* @brief Aquire the bus ready for readings
*
* @notapi
*/
static __inline void aquire_bus(void) {
}
/**
* @brief Release the bus after readings
*
* @notapi
*/
static __inline void release_bus(void) {
}
/**
* @brief Read an x value from touch controller
* @return The value read from the controller
*
* @notapi
*/
static __inline uint16_t read_x_value(void) {
uint16_t val1, val2;
adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_ANALOG);
palSetPadMode(GPIOC, 1, PAL_MODE_INPUT_ANALOG);
palSetPadMode(GPIOC, 2, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL);
palSetPad(GPIOC, 2);
palClearPad(GPIOC, 3);
chThdSleepMilliseconds(1);
adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
val1 = ((samples[0] + samples[1])/2);
palClearPad(GPIOC, 2);
palSetPad(GPIOC, 3);
chThdSleepMilliseconds(1);
adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
val2 = ((samples[0] + samples[1])/2);
return ((val1+((1<<12)-val2))/4);
}
/**
* @brief Read an y value from touch controller
* @return The value read from the controller
*
* @notapi
*/
static __inline uint16_t read_y_value(void) {
uint16_t val1, val2;
adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
palSetPadMode(GPIOC, 2, PAL_MODE_INPUT_ANALOG);
palSetPadMode(GPIOC, 3, PAL_MODE_INPUT_ANALOG);
palSetPadMode(GPIOC, 0, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOC, 1, PAL_MODE_OUTPUT_PUSHPULL);
palSetPad(GPIOC, 1);
palClearPad(GPIOC, 0);
chThdSleepMilliseconds(1);
adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
val1 = ((samples[0] + samples[1])/2);
palClearPad(GPIOC, 0);
palSetPad(GPIOC, 1);
chThdSleepMilliseconds(1);
adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
val2 = ((samples[0] + samples[1])/2);
return ((val1+((1<<12)-val2))/4);
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */