ESP32(三) LEDC

初始化

#define LEDC_OUTPUT_IOA          (7)
#define LEDC_MODE               LEDC_LOW_SPEED_MODE
#define LEDC_CHANNEL_A            LEDC_CHANNEL_0
void ledc_init(){
    ledc_timer_config_t ledc_timer_a = {
            .speed_mode       = LEDC_MODE,
            .timer_num        = LEDC_TIMER_0,
            .duty_resolution  = LEDC_TIMER_13_BIT,
            .freq_hz          = 5000,  // Set output frequency at 5 kHz
            .clk_cfg          = LEDC_AUTO_CLK
    };
    ledc_timer_config(&ledc_timer_a);
    ledc_channel_config_t ledc_channel_a = {
            .speed_mode     = LEDC_MODE,
            .channel        = LEDC_CHANNEL_A,
            .timer_sel      = LEDC_TIMER_0,
            .intr_type      = LEDC_INTR_DISABLE,
            .gpio_num       = LEDC_OUTPUT_IOA,
            .duty           = 0,
            .hpoint         = 0
    };
    ledc_channel_config(&ledc_channel_a);
}

使用

ledc_set_duty(LEDC_MODE, LEDC_CHANNEL_A, 4096);
ledc_update_duty(LEDC_MODE, LEDC_CHANNEL_A);