#include "driver/gpio.h" #include "driver/ledc.h" #include "esp_err.h" #include "esp_log.h" #include "esp_system.h" #include "xclk.h" #include "esp_camera.h" #if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG) #include "esp32-hal-log.h" #else #include "esp_log.h" static const char* TAG = "camera_xclk"; #endif #define NO_CAMERA_LEDC_CHANNEL 0xFF static ledc_channel_t g_ledc_channel = NO_CAMERA_LEDC_CHANNEL; esp_err_t xclk_timer_conf(int ledc_timer, int xclk_freq_hz) { ledc_timer_config_t timer_conf; timer_conf.duty_resolution = LEDC_TIMER_1_BIT; timer_conf.freq_hz = xclk_freq_hz; timer_conf.speed_mode = LEDC_LOW_SPEED_MODE; #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0) timer_conf.deconfigure = false; #endif #if ESP_IDF_VERSION_MAJOR >= 4 timer_conf.clk_cfg = LEDC_AUTO_CLK; #endif timer_conf.timer_num = (ledc_timer_t)ledc_timer; esp_err_t err = ledc_timer_config(&timer_conf); if (err != ESP_OK) { ESP_LOGE(TAG, "ledc_timer_config failed for freq %d, rc=%x", xclk_freq_hz, err); } return err; } esp_err_t camera_enable_out_clock(const camera_config_t* config) { esp_err_t err = xclk_timer_conf(config->ledc_timer, config->xclk_freq_hz); if (err != ESP_OK) { ESP_LOGE(TAG, "ledc_timer_config failed, rc=%x", err); return err; } g_ledc_channel = config->ledc_channel; ledc_channel_config_t ch_conf = {0}; ch_conf.gpio_num = config->pin_xclk; ch_conf.speed_mode = LEDC_LOW_SPEED_MODE; ch_conf.channel = config->ledc_channel; ch_conf.intr_type = LEDC_INTR_DISABLE; ch_conf.timer_sel = config->ledc_timer; ch_conf.duty = 1; ch_conf.hpoint = 0; err = ledc_channel_config(&ch_conf); if (err != ESP_OK) { ESP_LOGE(TAG, "ledc_channel_config failed, rc=%x", err); return err; } return ESP_OK; } void camera_disable_out_clock() { if (g_ledc_channel != NO_CAMERA_LEDC_CHANNEL) { ledc_stop(LEDC_LOW_SPEED_MODE, g_ledc_channel, 0); g_ledc_channel = NO_CAMERA_LEDC_CHANNEL; } }