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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.io/license.html
*/
/**
* @file boards/addons/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.
*
* @note This file contains a mix of hardware specific and operating system specific
* code. You will need to change it for your CPU and/or operating system.
*/
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
#define ADC_MAX 1023
// Resolution and Accuracy Settings
#define GMOUSE_MCU_PEN_CALIBRATE_ERROR 8
#define GMOUSE_MCU_PEN_CLICK_ERROR 6
#define GMOUSE_MCU_PEN_MOVE_ERROR 4
#define GMOUSE_MCU_FINGER_CALIBRATE_ERROR 14
#define GMOUSE_MCU_FINGER_CLICK_ERROR 18
#define GMOUSE_MCU_FINGER_MOVE_ERROR 14
#define GMOUSE_MCU_Z_MIN 0 // The minimum Z reading
#define GMOUSE_MCU_Z_MAX ADC_MAX // The maximum Z reading
#define GMOUSE_MCU_Z_TOUCHON 60 // Values between this and Z_MAX are definitely pressed
#define GMOUSE_MCU_Z_TOUCHOFF 30 // Values between this and Z_MIN are definitely not pressed
// How much extra data to allocate at the end of the GMouse structure for the board's use
#define GMOUSE_MCU_BOARD_DATA_SIZE 0
static const ADCConfig ADCC = {
.vref = ADC_VREF_CFG_AVDD_AVSS,
.stime = 15,
.irq = EIC_IRQ_ADC,
.base = _ADC10_BASE_ADDRESS,
};
static struct ADCDriver ADCD;
#define YNEG 13 // U
#define XNEG 15 // R
#define XPOS 12 // L
#define YPOS 11 // D
static const ADCConversionGroup ADC_X_CG = {
.circular = 0,
.num_channels = 1,
.channels = 1 << XNEG,
};
static const ADCConversionGroup ADC_Y_CG = {
.circular = 0,
.num_channels = 1,
.channels = 1 << YPOS,
};
static gBool init_board(GMouse *m, unsigned driverinstance) {
(void) m;
if (driverinstance)
return gFalse;
adcObjectInit(&ADCD);
adcStart(&ADCD, &ADCC);
return gTrue;
}
static gBool read_xyz(GMouse *m, GMouseReading *prd) {
adcsample_t samples[2];
prd->buttons = 0;
// Read the z value first.
// Set X+ to ground and Y- to VCC
palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
palClearPad(IOPORTB, XPOS);
palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
palSetPad(IOPORTB, YNEG);
palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
adcConvert(&ADCD, &ADC_X_CG, &samples[0], 1);
adcConvert(&ADCD, &ADC_Y_CG, &samples[1], 1);
pdr->z = ADC_MAX - (samples[1] - samples[0]);
// Shortcut - no need to read X or Y if the touch is off.
if (pdr->z < GMOUSE_MCU_Z_TOUCHON)
return gTrue;
// Read X
palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
palSetPad(IOPORTB, XPOS);
palSetPadMode(IOPORTB, XNEG, PAL_MODE_OUTPUT);
palClearPad(IOPORTB, XNEG);
palSetPadMode(IOPORTB, YNEG, PAL_MODE_INPUT);
palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
adcConvert(&ADCD, &ADC_Y_CG, &samples[0], 1);
pdr->x = ADC_MAX - samples[0];
// Read Y
palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
palClearPad(IOPORTB, YNEG);
palSetPadMode(IOPORTB, YPOS, PAL_MODE_OUTPUT);
palSetPad(IOPORTB, YPOS);
palSetPadMode(IOPORTB, XPOS, PAL_MODE_INPUT);
palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
adcConvert(&ADCD, &ADC_X_CG, &samples[0], 1);
pdr->y = ADC_MAX - samples[0];
return gTrue;
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */
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