56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
#include <stdio.h>
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#include <math.h>
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#include "driver/ledc.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 "esp_clk_tree.h"
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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const char* TAG = "MAIN_CPP";
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void app_main() {
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ESP_LOGI(TAG, "BOOT\n");
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const uint32_t timer_freq = 2731;
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uint32_t clk_freq = 0;
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ESP_ERROR_CHECK(esp_clk_tree_src_get_freq_hz(SOC_MOD_CLK_RC_FAST, ESP_CLK_TREE_SRC_FREQ_PRECISION_EXACT, &clk_freq));
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uint32_t duty_resolution = ledc_find_suitable_duty_resolution(clk_freq, timer_freq);
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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 = {
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.speed_mode = LEDC_LOW_SPEED_MODE,
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.timer_num = LEDC_TIMER_0,
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.freq_hz = timer_freq,
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.duty_resolution = duty_resolution,
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.clk_cfg = LEDC_USE_RC_FAST_CLK
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};
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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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};
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ESP_ERROR_CHECK(ledc_channel_config(&ledc_ch_config));
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while (true) {
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vTaskDelay(10000);
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}
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}
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