95 lines
2.5 KiB
C
95 lines
2.5 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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#ifndef _LLD_GMOUSE_MCU_BOARD_H
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#define _LLD_GMOUSE_MCU_BOARD_H
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// Resolution and Accuracy Settings
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#define GMOUSE_MCU_PEN_CALIBRATE_ERROR 8
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#define GMOUSE_MCU_PEN_CLICK_ERROR 6
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#define GMOUSE_MCU_PEN_MOVE_ERROR 4
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#define GMOUSE_MCU_FINGER_CALIBRATE_ERROR 14
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#define GMOUSE_MCU_FINGER_CLICK_ERROR 18
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#define GMOUSE_MCU_FINGER_MOVE_ERROR 14
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#define GMOUSE_MCU_Z_MIN 0
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#define GMOUSE_MCU_Z_MAX 4095
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#define GMOUSE_MCU_Z_TOUCHON 3090
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#define GMOUSE_MCU_Z_TOUCHOFF 400
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// How much extra data to allocate at the end of the GMouse structure for the board's use
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#define GMOUSE_MCU_BOARD_DATA_SIZE 0
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#define ADC_NUM_CHANNELS 2
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#define ADC_BUF_DEPTH 1
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static const ADCConversionGroup adcgrpcfg = {
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FALSE,
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ADC_NUM_CHANNELS,
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0,
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0,
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/* HW dependent part.*/
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0,
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ADC_CR2_SWSTART,
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0,
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0,
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ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
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0,
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ADC_SQR3_SQ2_N(ADC_CHANNEL_IN8) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN9)
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};
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static bool_t init_board(GMouse *m, unsigned driverinstance) {
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(void) m;
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// Only one touch interface on this board
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if (driverinstance)
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return FALSE;
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adcStart(&ADCD1, 0);
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// Set up for reading Z
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palClearPad(GPIOB, GPIOB_DRIVEA);
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palClearPad(GPIOB, GPIOB_DRIVEB);
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chThdSleepMilliseconds(1); // Settling time
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return TRUE;
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}
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static void read_xyz(GMouse *m, GMouseReading *prd) {
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adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
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(void) m;
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// No buttons
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prd->buttons = 0;
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// Get the z reading (assumes we are ready to read z)
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adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
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prd->z = samples[0];
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// Take a shortcut and don't read x, y if we know we are definitely not touched.
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if (prd->z >= GMOUSE_MCU_Z_TOUCHOFF) {
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// Get the x reading
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palSetPad(GPIOB, GPIOB_DRIVEA);
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palClearPad(GPIOB, GPIOB_DRIVEB);
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chThdSleepMilliseconds(2);
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adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
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prd->x = samples[1];
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// Get the y reading
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palClearPad(GPIOB, GPIOB_DRIVEA);
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palSetPad(GPIOB, GPIOB_DRIVEB);
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chThdSleepMilliseconds(2);
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adcConvert(&ADCD1, &adcgrpcfg, samples, ADC_BUF_DEPTH);
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prd->y = samples[0];
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// Set up for reading z again. We know it will be 20ms before we get called again so don't worry about settling time
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palClearPad(GPIOB, GPIOB_DRIVEA);
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palClearPad(GPIOB, GPIOB_DRIVEB);
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}
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}
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#endif /* _LLD_GMOUSE_MCU_BOARD_H */
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