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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.org/license.html
*/
#ifndef _LLD_GMOUSE_MCU_BOARD_H
#define _LLD_GMOUSE_MCU_BOARD_H
// 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
#define GMOUSE_MCU_Z_MAX 4095
#define GMOUSE_MCU_Z_TOUCHON 3090
#define GMOUSE_MCU_Z_TOUCHOFF 400
// 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
#define ADC_NUM_CHANNELS 2
#define ADC_BUF_DEPTH 1
static const ADCConversionGroup adcgrpcfg = {
FALSE,
ADC_NUM_CHANNELS,
0,
0,
/* HW dependent part.*/
0,
ADC_CR2_SWSTART,
0,
0,
ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
0,
ADC_SQR3_SQ2_N(ADC_CHANNEL_IN8) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN9)
};
static gBool init_board(GMouse *m, unsigned driverinstance) {
(void) m;
// Only one touch interface on this board
if (driverinstance)
return gFalse;
adcStart(&ADCD1, 0);
// Set up for reading Z
palClearPad(GPIOB, GPIOB_DRIVEA);
palClearPad(GPIOB, GPIOB_DRIVEB);
chThdSleepMilliseconds(1); // Settling time
return gTrue;
}
static gBool read_xyz(GMouse *m, GMouseReading *prd) {
adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
(void) m;
// No buttons
prd->buttons = 0;
// Get the z reading (assumes we are ready to read z)
adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
prd->z = samples[0];
// Take a shortcut and don't read x, y if we know we are definitely not touched.
if (prd->z >= GMOUSE_MCU_Z_TOUCHOFF) {
// Get the x reading
palSetPad(GPIOB, GPIOB_DRIVEA);
palClearPad(GPIOB, GPIOB_DRIVEB);
chThdSleepMilliseconds(2);
adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
prd->x = samples[1];
// Get the y reading
palClearPad(GPIOB, GPIOB_DRIVEA);
palSetPad(GPIOB, GPIOB_DRIVEB);
chThdSleepMilliseconds(2);
adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
prd->y = samples[0];
// Set up for reading z again. We know it will be 20ms before we get called again so don't worry about settling time
palClearPad(GPIOB, GPIOB_DRIVEA);
palClearPad(GPIOB, GPIOB_DRIVEB);
}
return gTrue;
}
#endif /* _LLD_GMOUSE_MCU_BOARD_H */
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