ESP32 Forum

 

 

 

 

 

 

const char* ssid = "@PHICOMM_3E";

const char* password = "asdasd110";

 

const char* websockets_server_host = "192.168.2.40";

const uint16_t websockets_server_port = 10086;

 

TaskHandle_t i2sADCHandler = NULL;

 

using namespace websockets;

WebsocketsClient client;

 

const i2s_config_t i2s_config_rx = {

  .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),

  .sample_rate = I2S_SAMPLE_RATE,

  .bits_per_sample = i2s_bits_per_sample_t(I2S_SAMPLE_BITS),

  .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,

  .communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),

    .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,

    .dma_buf_count = 64,

    .dma_buf_len = 64

 

const i2s_pin_config_t pin_config_rx = {

  .bck_io_num = I2S_SCK_RX,

  .ws_io_num = I2S_WS_RX,

  .data_out_num = I2S_PIN_NO_CHANGE,

  .data_in_num = I2S_SD_RX

 

void setup() {

 

   WiFi.mode(WIFI_STA);

   WiFi.disconnect();

   Serial.begin(115200);

   Serial.setDebugOutput(true);

   start_to_connect();

 

void start_to_connect(){

  Serial.println("===================================================================");

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(2000);

    Serial.print(".");

  }

  Serial.println("");

 

  Serial.println("WiFi connected");

  Serial.println("IP address: ");

  Serial.println(WiFi.localIP());;

 

  client.onEvent(onEventsCallback);

  while(!client.connect(websockets_server_host, websockets_server_port, "/")){

    delay(100);

    Serial.print(".");

  }

 

  Serial.println("Socket Connected!");

 

void i2s_adc_data_scale(uint8_t * d_buff, uint8_t* s_buff, uint32_t len)

    uint32_t j = 0;

    uint32_t dac_value = 0;

    for (int i = 0; i < len; i += 2) {

        dac_value = ((((uint16_t) (s_buff[i + 1] & 0xf) << 8) | ((s_buff[i + 0]))));

        d_buff[j++] = 0;

        d_buff[j++] = dac_value * 256 / 2048 ;

    }

 

static void i2s_adc_task(void *arg)

    i2s_driver_install(I2S_NUM_1, &i2s_config_rx, 0, NULL);

    i2s_set_pin(I2S_NUM_1, &pin_config_rx);

 

    int i2s_read_len = I2S_READ_LEN;

    size_t bytes_read;

 

    char* i2s_read_buff = (char*) calloc(i2s_read_len, sizeof(char));

    uint8_t* flash_write_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));

    Serial.println(" *** Recording Start *** ");

    while (1) {

        i2s_read(I2S_PORT, (void*) i2s_read_buff, i2s_read_len, &bytes_read, portMAX_DELAY);

        i2s_adc_data_scale(flash_write_buff, (uint8_t*)i2s_read_buff, i2s_read_len);

        client.sendBinary((const char*)flash_write_buff, i2s_read_len);

        Serial.println("");

        Serial.print("SendBinary  len = ");

        Serial.print(i2s_read_len);

        ets_printf("Never Used Stack Size: %u\n", uxTaskGetStackHighWaterMark(NULL));

    }

 

    free(i2s_read_buff);

    i2s_read_buff = NULL;

    free(flash_write_buff);

    flash_write_buff = NULL;

 

void loop() {

 

 

void onEventsCallback(WebsocketsEvent event, String data) {

    if(event == WebsocketsEvent::ConnectionOpened) {

        Serial.println("Connnection Opened");

        xTaskCreate(i2s_adc_task, "i2s_adc_task", 4096, NULL, 1, &i2sADCHandler);

    } else if(event == WebsocketsEvent::ConnectionClosed) {

        Serial.println("Connnection Closed");

        ESP.restart();

    }