152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h
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* @brief GINPUT Touch low level driver source for the MCU on the example board.
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*
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* @defgroup Mouse Mouse
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* @ingroup GINPUT
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*
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* @{
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*/
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#ifndef _GINPUT_LLD_MOUSE_BOARD_H
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#define _GINPUT_LLD_MOUSE_BOARD_H
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static const ADCConfig ADCC = {
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.vref = ADC_VREF_CFG_AVDD_AVSS,
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.stime = 15,
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.irq = EIC_IRQ_ADC,
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.base = _ADC10_BASE_ADDRESS,
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};
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static struct ADCDriver ADCD;
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#define YNEG 13 // U
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#define XNEG 15 // R
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#define XPOS 12 // L
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#define YPOS 11 // D
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#define ADC_MAX 1023
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#define TOUCH_THRESHOULD 50
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static const ADCConversionGroup ADC_X_CG = {
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.circular = FALSE,
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.num_channels = 1,
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.channels = 1 << XNEG,
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};
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static const ADCConversionGroup ADC_Y_CG = {
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.circular = FALSE,
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.num_channels = 1,
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.channels = 1 << YPOS,
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};
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/**
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* @brief Initialise the board for the touch.
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*
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* @notapi
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*/
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static inline void init_board(void) {
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adcObjectInit(&ADCD);
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adcStart(&ADCD, &ADCC);
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}
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/**
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* @brief Check whether the surface is currently touched
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* @return TRUE if the surface is currently touched
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*
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* @notapi
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*/
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static inline bool_t getpin_pressed(void) {
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adcsample_t samples[2] = {0, };
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// Set X+ to ground
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palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
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palClearPad(IOPORTB, XPOS);
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// Set Y- to VCC
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palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
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palSetPad(IOPORTB, YNEG);
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palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
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adcConvert(&ADCD, &ADC_X_CG, &samples[0], 1);
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adcConvert(&ADCD, &ADC_Y_CG, &samples[1], 1);
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return (ADC_MAX - (samples[1] - samples[0])) > TOUCH_THRESHOULD;
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}
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/**
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* @brief Aquire the bus ready for readings
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*
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* @notapi
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*/
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static inline void aquire_bus(void) {
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}
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/**
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* @brief Release the bus after readings
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*
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* @notapi
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*/
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static inline void release_bus(void) {
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}
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/**
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* @brief Read an x value from touch controller
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* @return The value read from the controller
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*
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* @notapi
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*/
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static inline uint16_t read_x_value(void) {
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adcsample_t sample;
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palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
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palSetPad(IOPORTB, XPOS);
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palSetPadMode(IOPORTB, XNEG, PAL_MODE_OUTPUT);
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palClearPad(IOPORTB, XNEG);
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palSetPadMode(IOPORTB, YNEG, PAL_MODE_INPUT);
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palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
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adcConvert(&ADCD, &ADC_Y_CG, &sample, 1);
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return ADC_MAX - sample;
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}
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/**
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* @brief Read an y value from touch controller
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* @return The value read from the controller
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*
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* @notapi
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*/
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static inline uint16_t read_y_value(void) {
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adcsample_t sample;
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palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
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palClearPad(IOPORTB, YNEG);
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palSetPadMode(IOPORTB, YPOS, PAL_MODE_OUTPUT);
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palSetPad(IOPORTB, YPOS);
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palSetPadMode(IOPORTB, XPOS, PAL_MODE_INPUT);
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palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
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adcConvert(&ADCD, &ADC_X_CG, &sample, 1);
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return ADC_MAX - sample;
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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/** @} */
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