85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
#include <math.h>
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#include <stdint.h>
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#include "driver/ledc.h"
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#include "esp_clk_tree.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h" // IWYU pragma: keep
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#include "freertos/task.h"
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#include "hal/ledc_types.h"
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#include "soc/clk_tree_defs.h"
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#include "buzzer.h"
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static const char* TAG = "BUZZER_C";
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const uint32_t init_buzzer_freq = 2731;
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void buzzer_init(const uint32_t frequency) {
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uint32_t clk_freq = 0;
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ESP_ERROR_CHECK(esp_clk_tree_src_get_freq_hz(
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SOC_MOD_CLK_RC_FAST, ESP_CLK_TREE_SRC_FREQ_PRECISION_EXACT, &clk_freq));
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uint32_t duty_resolution =
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ledc_find_suitable_duty_resolution(clk_freq, frequency);
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if (duty_resolution == 0) {
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ESP_LOGE(TAG, "Could not determine optimal duty resolution.\n");
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return;
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}
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ledc_timer_config_t ledc_config = {.speed_mode = LEDC_LOW_SPEED_MODE,
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.timer_num = LEDC_TIMER_0,
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.freq_hz = frequency,
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.duty_resolution = duty_resolution,
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.clk_cfg = LEDC_USE_RC_FAST_CLK};
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ESP_ERROR_CHECK(ledc_timer_config(&ledc_config));
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ledc_channel_config_t ledc_ch_config = {
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.gpio_num = 9,
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.speed_mode = LEDC_LOW_SPEED_MODE,
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.channel = LEDC_CHANNEL_0,
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.timer_sel = LEDC_TIMER_0,
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.duty = (uint32_t)(pow(2, duty_resolution) / 2),
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// .hpoint = ((uint32_t) pow(2, duty_resolution)) - 1,
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.hpoint = 0,
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.sleep_mode = LEDC_SLEEP_MODE_KEEP_ALIVE,
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.flags.output_invert = false};
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ESP_ERROR_CHECK(ledc_channel_config(&ledc_ch_config));
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}
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uint32_t modify_frequency(int amount) {
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uint32_t freq = ledc_get_freq(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0) + amount;
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if (freq < 10) {
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freq = 10;
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}
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buzzer_pause();
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ESP_ERROR_CHECK(ledc_set_freq(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0, freq));
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buzzer_resume();
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return freq;
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}
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uint32_t reset_frequency() {
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ESP_ERROR_CHECK(
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ledc_set_freq(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0, init_buzzer_freq));
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return init_buzzer_freq;
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}
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void set_frequency(const uint32_t freq) {
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ESP_ERROR_CHECK(ledc_set_freq(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0, freq));
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}
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void buzzer_pause() {
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ESP_ERROR_CHECK(ledc_timer_pause(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0));
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}
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void buzzer_reset() {
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ESP_ERROR_CHECK(ledc_timer_rst(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0));
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}
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void buzzer_resume() {
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ESP_ERROR_CHECK(ledc_timer_resume(LEDC_LOW_SPEED_MODE, LEDC_TIMER_0));
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}
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