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97 lines
3.0 KiB
C++
97 lines
3.0 KiB
C++
//
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// Created by Stepan Usatiuk on 02.03.2025.
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//
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#include "buttons.hpp"
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#include <driver/gpio.h>
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#include <esp_err.h>
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#include <power_helper.hpp>
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#include <rom/ets_sys.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "config.hpp"
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#include "i2c_global.hpp"
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static i2c_master_dev_handle_t dev_handle;
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static inline i2c_device_config_t dev_cfg = {
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.dev_addr_length = I2C_ADDR_BIT_LEN_7,
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.device_address = 0x20,
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.scl_speed_hz = 100000,
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};
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Buttons& Buttons::get() {
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static Buttons buttons;
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return buttons;
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}
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static void start_pooler(void* arg) { static_cast<Buttons*>(arg)->pooler(); }
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static bool is_on_low;
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static void wakeup(void* arg) {
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if (is_on_low) {
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ESP_ERROR_CHECK(gpio_set_intr_type(EXP_INT, GPIO_INTR_HIGH_LEVEL));
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ESP_ERROR_CHECK(gpio_wakeup_enable(EXP_INT, GPIO_INTR_HIGH_LEVEL));
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is_on_low = false;
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BaseType_t xResult = pdFAIL;
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BaseType_t xHigherPriorityTaskWoken = pdFALSE;
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xTaskNotifyFromISR(Buttons::get()._pooler_task, 0, eNoAction, &xHigherPriorityTaskWoken);
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PowerHelper::get().reset_slow_isr(&xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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} else {
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ESP_ERROR_CHECK(gpio_set_intr_type(EXP_INT, GPIO_INTR_LOW_LEVEL));
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ESP_ERROR_CHECK(gpio_wakeup_enable(EXP_INT, GPIO_INTR_LOW_LEVEL));
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is_on_low = true;
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}
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}
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Buttons::Buttons() {
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ESP_ERROR_CHECK(i2c_master_bus_add_device(I2cGlobal::get().get_bus_handle(), &dev_cfg, &dev_handle));
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uint8_t buf2[2];
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// Config
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buf2[0] = 6;
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buf2[1] = 0xFF;
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ESP_ERROR_CHECK(i2c_master_transmit(dev_handle, buf2, sizeof(buf2), -1));
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buf2[0] = 7;
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buf2[1] = 0x80;
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ESP_ERROR_CHECK(i2c_master_transmit(dev_handle, buf2, sizeof(buf2), -1));
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xTaskCreate(&start_pooler, "ButtonsPooler", 2048, this, 1, &_pooler_task);
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ESP_ERROR_CHECK(gpio_reset_pin(EXP_INT));
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ESP_ERROR_CHECK(gpio_set_direction(EXP_INT, GPIO_MODE_INPUT));
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ESP_ERROR_CHECK(gpio_set_pull_mode(EXP_INT, GPIO_FLOATING));
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ESP_ERROR_CHECK(gpio_set_intr_type(EXP_INT, GPIO_INTR_LOW_LEVEL));
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ESP_ERROR_CHECK(gpio_wakeup_enable(EXP_INT, GPIO_INTR_LOW_LEVEL));
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is_on_low = true;
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}
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static void delay(unsigned long long loop) {
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for (unsigned long long i = 0; i < loop; i++) {
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asm volatile("nop");
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}
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}
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void Buttons::pooler() {
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while (true) {
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BaseType_t xResult = xTaskNotifyWait(pdFALSE, ULONG_MAX, nullptr, portMAX_DELAY);
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uint8_t reg = 0;
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uint8_t buffer;
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ESP_ERROR_CHECK(
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i2c_master_transmit_receive(dev_handle, ®, sizeof(reg), reinterpret_cast<uint8_t*>(&buffer), 1, -1));
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_current = buffer;
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// read second port too to clear the interrupt
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reg = 1;
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ESP_ERROR_CHECK(
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i2c_master_transmit_receive(dev_handle, ®, sizeof(reg), reinterpret_cast<uint8_t*>(&buffer), 1, -1));
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}
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}
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uint8_t Buttons::get_pressed() { return _current; }
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void Buttons::install_isr() { gpio_isr_handler_add(EXP_INT, wakeup, nullptr); }
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