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https://github.com/ByteWelder/Tactility.git
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63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
#include "TdeckKeyboard.h"
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#include <Tactility/hal/i2c/I2c.h>
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#include <driver/i2c.h>
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constexpr auto* TAG = "TdeckKeyboard";
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constexpr auto TDECK_KEYBOARD_I2C_BUS_HANDLE = I2C_NUM_0;
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constexpr auto TDECK_KEYBOARD_SLAVE_ADDRESS = 0x55;
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static bool keyboard_i2c_read(uint8_t* output) {
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return tt::hal::i2c::masterRead(TDECK_KEYBOARD_I2C_BUS_HANDLE, TDECK_KEYBOARD_SLAVE_ADDRESS, output, 1, 100 / portTICK_PERIOD_MS);
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}
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/**
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* The callback simulates press and release events, because the T-Deck
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* keyboard only publishes press events on I2C.
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* LVGL currently works without those extra release events, but they
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* are implemented for correctness and future compatibility.
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*
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* @param indev_drv
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* @param data
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*/
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static void keyboard_read_callback(TT_UNUSED lv_indev_t* indev, lv_indev_data_t* data) {
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static uint8_t last_buffer = 0x00;
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uint8_t read_buffer = 0x00;
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// Defaults
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data->key = 0;
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data->state = LV_INDEV_STATE_RELEASED;
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if (keyboard_i2c_read(&read_buffer)) {
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if (read_buffer == 0 && read_buffer != last_buffer) {
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TT_LOG_D(TAG, "Released %d", last_buffer);
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data->key = last_buffer;
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data->state = LV_INDEV_STATE_RELEASED;
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} else if (read_buffer != 0) {
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TT_LOG_D(TAG, "Pressed %d", read_buffer);
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data->key = read_buffer;
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data->state = LV_INDEV_STATE_PRESSED;
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}
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}
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last_buffer = read_buffer;
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}
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bool TdeckKeyboard::startLvgl(lv_display_t* display) {
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deviceHandle = lv_indev_create();
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lv_indev_set_type(deviceHandle, LV_INDEV_TYPE_KEYPAD);
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lv_indev_set_read_cb(deviceHandle, &keyboard_read_callback);
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lv_indev_set_display(deviceHandle, display);
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lv_indev_set_user_data(deviceHandle, this);
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return true;
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}
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bool TdeckKeyboard::stopLvgl() {
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lv_indev_delete(deviceHandle);
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deviceHandle = nullptr;
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return true;
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}
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bool TdeckKeyboard::isAttached() const {
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return tt::hal::i2c::masterHasDeviceAtAddress(TDECK_KEYBOARD_I2C_BUS_HANDLE, TDECK_KEYBOARD_SLAVE_ADDRESS, 100);
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}
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