119 lines
3.4 KiB
C
119 lines
3.4 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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/**
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* @file boards/addons/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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* @note This file contains a mix of hardware specific and operating system specific
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* code. You will need to change it for your CPU and/or operating system.
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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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#define ADC_MAX 1023
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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 // The minimum Z reading
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#define GMOUSE_MCU_Z_MAX ADC_MAX // The maximum Z reading
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#define GMOUSE_MCU_Z_TOUCHON 60 // Values between this and Z_MAX are definitely pressed
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#define GMOUSE_MCU_Z_TOUCHOFF 30 // Values between this and Z_MIN are definitely not pressed
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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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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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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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static gBool init_board(GMouse *m, unsigned driverinstance) {
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(void) m;
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if (driverinstance)
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return gFalse;
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adcObjectInit(&ADCD);
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adcStart(&ADCD, &ADCC);
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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[2];
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prd->buttons = 0;
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// Read the z value first.
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// Set X+ to ground and Y- to VCC
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palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
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palClearPad(IOPORTB, XPOS);
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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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pdr->z = ADC_MAX - (samples[1] - samples[0]);
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// Shortcut - no need to read X or Y if the touch is off.
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if (pdr->z < GMOUSE_MCU_Z_TOUCHON)
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return gTrue;
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// Read X
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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, &samples[0], 1);
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pdr->x = ADC_MAX - samples[0];
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// Read Y
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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, &samples[0], 1);
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pdr->y = ADC_MAX - samples[0];
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return gTrue;
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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/** @} */
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