ESP32 Forum

Code: Untitled.c Select all

#include <stdio.h>

#include <driver\i2s_std.h>

#include "driver\gpio.h"

#include "freeRTOS\freeRTOS.h"

#include "freeRTOS\task.h"

void app_main(void)

{

    printf("Hello world!\n");

    gpio_reset_pin(GPIO_NUM_5);

    gpio_set_direction(GPIO_NUM_5, GPIO_MODE_OUTPUT);

    gpio_set_level(GPIO_NUM_5, 1);

    gpio_reset_pin(GPIO_NUM_6);

    gpio_set_direction(GPIO_NUM_6, GPIO_MODE_OUTPUT);

    gpio_set_level(GPIO_NUM_6, 0);

    i2s_chan_handle_t rx_handle;

    i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_MASTER);

    i2s_new_channel(&chan_cfg, NULL, &rx_handle);



    i2s_std_config_t std_cfg = {

        .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(8000),

        .slot_cfg = I2S_STD_MSB_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_24BIT, I2S_SLOT_MODE_STEREO),

        .gpio_cfg = {

            .mclk = GPIO_NUM_19,

            .bclk = GPIO_NUM_18,

            .ws = GPIO_NUM_20,

            .dout = GPIO_NUM_NC,

            .din = GPIO_NUM_21,

            .invert_flags = {

                .mclk_inv = false,

                .bclk_inv = false,

                .ws_inv = false,

            },

        },

    };

    std_cfg.clk_cfg.mclk_multiple = I2S_MCLK_MULTIPLE_384;

    i2s_channel_init_std_mode(rx_handle, &std_cfg);



    i2s_channel_enable(rx_handle);

    int32_t raw_samples[300];

    while (1) {

        size_t bytes_read = 0;

        i2s_channel_read(rx_handle, raw_samples, 3 * 100, &bytes_read, 20);

        int samples_read = bytes_read / 3;

        // dump the samples out to the serial channel.

        for (int i = 0; i < samples_read; i++)

        {

            printf("%ld\n", raw_samples[i]);

        }

    }

}