connecting inmp441 with esp32

holaaaa123
Posts: 1
Joined: Sat Nov 25, 2023 12:01 pm

connecting inmp441 with esp32

Postby holaaaa123 » Sat Nov 25, 2023 12:08 pm

i have been trying so hard to connect the inmp411 with esp32 but it doesn't seem that it is receiving any data. I got another module to check if maybe the first one was defected but i'm still getting the same result, i'm only getting 0's in the serial monitor.
this is my code:

Code: Select all

#include <driver/i2s.h>

#define SAMPLE_BUFFER_SIZE 512
#define SAMPLE_RATE 8000
#define I2S_MIC_CHANNEL I2S_CHANNEL_FMT_ONLY_LEFT
#define I2S_MIC_SERIAL_CLOCK 22
#define I2S_MIC_LEFT_RIGHT_CLOCK 26
#define I2S_MIC_SERIAL_DATA 21


i2s_config_t i2s_config = {
    .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),
    .sample_rate = SAMPLE_RATE,
    .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT,
    .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
    .communication_format = I2S_COMM_FORMAT_I2S,
    .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
    .dma_buf_count = 4,
    .dma_buf_len = 1024,
    .use_apll = false,
    .tx_desc_auto_clear = false,
    .fixed_mclk = 0};


i2s_pin_config_t i2s_mic_pins = {
    .bck_io_num = I2S_MIC_SERIAL_CLOCK,
    .ws_io_num = I2S_MIC_LEFT_RIGHT_CLOCK,
    .data_out_num = I2S_PIN_NO_CHANGE,
    .data_in_num = I2S_MIC_SERIAL_DATA};

void setup()
{
  Serial.begin(115200);
  // start up the I2S peripheral
  i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
  i2s_set_pin(I2S_NUM_0, &i2s_mic_pins);
}

int32_t raw_samples[SAMPLE_BUFFER_SIZE];
void loop()
{
  // read from the I2S device
  size_t bytes_read = 0;
  i2s_read(I2S_NUM_0, raw_samples, sizeof(int32_t) * SAMPLE_BUFFER_SIZE, &bytes_read, portMAX_DELAY);
  int samples_read = bytes_read / sizeof(int32_t);
  // dump the samples out to the serial channel.
  for (int i = 0; i < samples_read; i++)
  {
    Serial.printf("%ld\n", raw_samples[i]);
  }
}

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