137 lines
3.8 KiB
C
137 lines
3.8 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.io/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 1
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#define GMOUSE_MCU_Z_TOUCHON 1
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#define GMOUSE_MCU_Z_TOUCHOFF 0
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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 adc_y_config = {
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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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0, 0,
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0, 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_IN12) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN13)
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};
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static const ADCConversionGroup adc_x_config = {
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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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0, 0,
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0, 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_IN10) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN11)
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};
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static GFXINLINE void setup_z(void) {
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palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOC, 1, PAL_MODE_INPUT);
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palSetPadMode(GPIOC, 2, PAL_MODE_INPUT);
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palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(GPIOC, 3);
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}
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static gBool 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 gFalse;
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adcStart(&ADCD1, 0);
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// Set up for reading Z
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setup_z();
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chThdSleepMilliseconds(1); // Settling time
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return gTrue;
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}
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static gBool read_xyz(GMouse *m, GMouseReading *prd) {
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adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
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uint16_t val1, val2;
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(void) m;
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// No buttons and assume touch off
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prd->buttons = 0;
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prd->z = 0;
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// Get the z reading (assumes we are ready to read z)
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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 (palReadPad(GPIOC, 0)) {
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prd->z = 1;
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// Get the x reading - Weird but it works. Optimize later.
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palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(GPIOC, 1, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(GPIOC, 2, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(GPIOC, 2);
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palClearPad(GPIOC, 3);
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gfxSleepMilliseconds(1);
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adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
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val1 = ((samples[0] + samples[1])/2);
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palClearPad(GPIOC, 2);
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palSetPad(GPIOC, 3);
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gfxSleepMilliseconds(1);
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adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
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val2 = ((samples[0] + samples[1])/2);
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prd->x = ((val1+((1<<12)-val2))/4);
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// Get the y reading - Weird but it works. Optimize later.
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palSetPadMode(GPIOC, 2, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(GPIOC, 3, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(GPIOC, 0, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOC, 1, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(GPIOC, 1);
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palClearPad(GPIOC, 0);
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gfxSleepMilliseconds(1);
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adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
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val1 = ((samples[0] + samples[1])/2);
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palClearPad(GPIOC, 1);
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palSetPad(GPIOC, 0);
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gfxSleepMilliseconds(1);
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adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
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val2 = ((samples[0] + samples[1])/2);
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prd->y = ((val1+((1<<12)-val2))/4);
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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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setup_z();
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}
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return gTrue;
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}
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#endif /* _LLD_GMOUSE_MCU_BOARD_H */
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