78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
#include "trackpad.h"
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// bool isScrollingMode = false;
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bool isScrollMode = false;
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void pointing_device_init(void){
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SPI_Init(SPI_SPEED_FCPU_DIV_8 | SPI_MODE_MASTER);
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// Set as output
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TP_RESET_INIT;
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TP_SHUTDOWN_INIT;
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TP_CS_INIT;
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LVL_SHIFT_EN_INIT;
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// Reset level shifter
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LVL_SHIFT_EN_LO;
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wait_ms(100);
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LVL_SHIFT_EN_HI;
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// Force a BB-8520 reset
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TP_RESET_HI;
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wait_ms(100);
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TP_RESET_LO;
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// Turn on BB-8520 trackpad
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TP_SHUTDOWN_LO;
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TP_CS_HI;
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}
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uint8_t readRegister(uint8_t address) {
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uint8_t data;
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TP_CS_LO;
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// Read the data
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SPI_TransferByte(address);
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data = SPI_TransferByte(0x00);
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TP_CS_HI;
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return data;
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}
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bool pointing_device_task(void){
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uint8_t motion = readRegister(0x02);
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// Motion has occurred on the trackpad
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if (motion > 127) {
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int8_t dx, dy;
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if(TRACKPAD_CONNECTOR_VER == 1) {
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dx = readRegister(0x03);
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dy = -readRegister(0x04);
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}
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else {
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dy = -readRegister(0x03);
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dx = -readRegister(0x04);
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}
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report_mouse_t currentReport = pointing_device_get_report();
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if (isScrollMode)
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{
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currentReport.h = dx/SCROLL_SPEED_DIVIDER;
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currentReport.v = dy/SCROLL_SPEED_DIVIDER;
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}
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else
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{
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currentReport.x = dx * POINTER_SPEED_MULTIPLIER;
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currentReport.y = dy * POINTER_SPEED_MULTIPLIER;
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}
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pointing_device_set_report(currentReport);
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}
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return pointing_device_send();
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}
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