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solosky
57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
#include "buzz.h"
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#include "driver/ledc.h"
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#include "esp_err.h"
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#include "esp_rom_sys.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/timers.h"
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#include <stdio.h>
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#define LEDC_TIMER LEDC_TIMER_0
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#define LEDC_MODE LEDC_LOW_SPEED_MODE
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#define LEDC_OUTPUT_IO (5) // Define the output GPIO
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#define LEDC_CHANNEL LEDC_CHANNEL_0
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#define LEDC_DUTY_RES LEDC_TIMER_10_BIT // Set duty resolution to 13 bits
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#define LEDC_DUTY (511) // Set duty to 50%. ((2 ** 13) - 1) * 50% = 4095
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#define LEDC_FREQUENCY (5000) // Frequency in Hertz. Set frequency at 5 kHz
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static volatile TimerHandle_t buzz_timer = NULL;
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static volatile bool buzz_on = false;
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static void buzz_timer_callback(TimerHandle_t timer) {
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ledc_stop(LEDC_MODE, LEDC_CHANNEL, 0);
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buzz_on = false;
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}
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void buzz_init(void) {
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// Prepare and then apply the LEDC PWM timer configuration
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ledc_timer_config_t ledc_timer = {
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.speed_mode = LEDC_MODE,
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.timer_num = LEDC_TIMER,
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.duty_resolution = LEDC_DUTY_RES,
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.freq_hz = LEDC_FREQUENCY, // Set output frequency at 5 kHz
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.clk_cfg = LEDC_AUTO_CLK};
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ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));
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// Prepare and then apply the LEDC PWM channel configuration
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ledc_channel_config_t ledc_channel = {.speed_mode = LEDC_MODE,
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.channel = LEDC_CHANNEL,
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.timer_sel = LEDC_TIMER,
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.intr_type = LEDC_INTR_DISABLE,
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.gpio_num = LEDC_OUTPUT_IO,
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.duty = 0, // Set duty to 0%
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.hpoint = 0};
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ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
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buzz_timer = xTimerCreate("buzz_timer", pdMS_TO_TICKS(50), pdTRUE, (void *)0,
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buzz_timer_callback);
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}
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void buzz_beep(uint32_t duration_ms) {
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xTimerChangePeriodFromISR(buzz_timer, pdMS_TO_TICKS(duration_ms), 0);
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if (!buzz_on) {
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buzz_on = true;
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ESP_ERROR_CHECK(ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, LEDC_DUTY));
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ESP_ERROR_CHECK(ledc_update_duty(LEDC_MODE, LEDC_CHANNEL));
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xTimerStartFromISR(buzz_timer, 0);
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}
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} |