ESP32 Forum

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xTaskCreate(SPEAKER_Run, "example_i2s_adc_dac", 1024 * 2, c, 5, &c->pSpeakerHandle);

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static void SPEAKER_I2S_Init(void)
{
	int i2s_num               = I2S_NUM;
	 i2s_config_t i2s_config  = {
		.mode                      = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN,
		.sample_rate            = 16000,
		.bits_per_sample      = 16,
		.communication_format = I2S_COMM_FORMAT_I2S_MSB,
		.channel_format            = I2S_CHANNEL_FMT_ONLY_RIGHT,
		.intr_alloc_flags             = 0,
		.dma_buf_count             = 2,
		.dma_buf_len                 = 1024,
		.use_apll                        = 1,
	 };

	 //install and start i2s driver
	 i2s_driver_install(i2s_num, &i2s_config, 0, NULL);

	 //init DAC pad
	 i2s_set_dac_mode(I2S_DAC_CHANNEL_RIGHT_EN); // maps to GPIO25 DAC Channel 1
}

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.dma_buf_count             = 2,
.dma_buf_len                 = 1024,

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esp_err_t i2s_driver_install(i2s_port_t i2s_num, const i2s_config_t *i2s_config, int queue_size, void* i2s_queue)
{
    esp_err_t err;
    I2S_CHECK((i2s_num < I2S_NUM_MAX), "i2s_num error", ESP_ERR_INVALID_ARG);
    I2S_CHECK((i2s_config != NULL), "I2S configuration must not NULL", ESP_ERR_INVALID_ARG);
    I2S_CHECK((i2s_config->dma_buf_count >= 2 && i2s_config->dma_buf_count <= 128), "I2S buffer count less than 128 and more than 2", ESP_ERR_INVALID_ARG);
    I2S_CHECK((i2s_config->dma_buf_len >= 8 && i2s_config->dma_buf_len <= 1024), "I2S buffer length at most 1024 and more than 8", ESP_ERR_INVALID_ARG);

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static const ledc_channel_config_t ledc_channel[LEDC_CHANNEL_COUNT] =
{
	{
		.channel    = LEDC_HS_CH0_CHANNEL,
		.duty       = 0,
		.gpio_num   = BLUE1_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH1_CHANNEL,
		.duty       = 0,
		.gpio_num   = GREEN1_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH2_CHANNEL,
		.duty       = 0,
		.gpio_num   = RED1_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH3_CHANNEL,
		.duty       = 0,
		.gpio_num   = BLUE2_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH4_CHANNEL,
		.duty       = 0,
		.gpio_num   = GREEN2_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH5_CHANNEL,
		.duty       = 0,
		.gpio_num   = RED2_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH6_CHANNEL,
		.duty       = 0,
		.gpio_num   = BLUE3_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_HS_CH7_CHANNEL,
		.duty       = 0,
		.gpio_num   = GREEN3_N,
		.speed_mode = LEDC_HS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_HS_TIMER0
	},
	{
		.channel    = LEDC_LS_CH0_CHANNEL,
		.duty       = 0,
		.gpio_num   = RED3_N,
		.speed_mode = LEDC_LS_MODE,
		.hpoint     = 0,
		.timer_sel  = LEDC_LS_TIMER0
	},
}; // end ledc_channel_config_t
{
	// Prepare and set configuration of timers that will be used by LED Controller
	ledc_timer_config_t ledc_timer0 =
	{
		.duty_resolution = LEDC_TIMER_13_BIT, // resolution of PWM duty
		.freq_hz = 5000,                      // frequency of PWM signal
		.speed_mode = LEDC_HS_MODE,           // timer mode
		.timer_num = LEDC_HS_TIMER0           // timer index
	};


	// Set configuration of timer0 ~ timer3 for high speed channels
	ledc_timer_config(&ledc_timer0);

	// Prepare and set configuration of timer0 for low speed channels
	ledc_timer_config_t ledc_timer0_LS =
	{
		.duty_resolution = LEDC_TIMER_13_BIT, // resolution of PWM duty
		.freq_hz = 5000,                      // frequency of PWM signal
		.speed_mode = LEDC_LS_MODE,           // timer mode
		.timer_num = LEDC_LS_TIMER0           // timer index
	};


	ledc_timer_config(&ledc_timer0_LS);

	// Set LED Controller with previously prepared configuration
	int ch;
	for (ch = 0; ch < LEDC_CHANNEL_COUNT; ch++)
	{
		ledc_channel_config2(&ledc_channel[ch]);
	}

    // Initialize fade service.
	ledc_fade_func_install(0);
} // end init_PWM()

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uint32_t wPriority = uxTaskPriorityGetFromISR(NULL);
	ESP_LOGI(TAG, "LED priority:%d", wPriority);

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    int i2s_num               = I2S_NUM;
	 i2s_config_t i2s_config  = {
		.mode                      = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN,
		.sample_rate            = 16000,
		.bits_per_sample      = 16,
		.communication_format = I2S_COMM_FORMAT_I2S_MSB,
		.channel_format            = I2S_CHANNEL_FMT_ONLY_RIGHT,
		.intr_alloc_flags             = 0,
		.dma_buf_count             = 4,
		.dma_buf_len                 = 1024,
		.use_apll                        = 1,
	 };

xTaskCreate(SPEAKER_Run, "example_i2s_adc_dac", 1024 * 2, c, 8, &c->pSpeakerHandle);