i2s get data from internal ADC

[wizz777]

----------------------------- Remove above -----------------------------

Hardware:

Board: ESP32 Dev Module
Core Installation/update date: 11/jul/2017
IDE name: Arduino IDE
Flash Frequency: 80Mhz
Upload Speed: 115200

Description:

Try to get data from internal ADC from i2c
but in RX data only zero
mic- MAX9812
Pin36 -> Mic OUT
GDN -> Mic GRND
3V -> Mic VCC

Sketch:

#include "driver/i2s.h"
#include "driver/adc.h"

int i2s_num = 0;
i2s_config_t i2s_config;

char* buf1= (char*) malloc(32768*2);

void example_disp_buf(uint8_t* buf, int length)
{

Serial.print("======\n");
for (int i = 0; i < length; i++) {
    Serial.printf("%02x ", buf[i]);
    if ((i + 1) % 8 == 0) {
        Serial.print("\n");
    }
}
Serial.print("======\n");

}

void setup() {
Serial.begin(115200);

//config i2s
i2s_config.mode = (i2s_mode_t) (I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_ADC_BUILT_IN);
i2s_config.sample_rate = 48000;
i2s_config.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT;
i2s_config.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT;
i2s_config.communication_format = (i2s_comm_format_t) (I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB);
i2s_config.dma_buf_count = 2;
i2s_config.dma_buf_len = 512;
i2s_config.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1;

//install and start i2s driver
if(i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL)==ESP_OK) Serial.println("1 driver OK");
if ( i2s_set_pin(I2S_NUM_0, NULL)==ESP_OK) Serial.println("2 pin OK");
if (i2s_set_adc_mode(ADC_UNIT_1, ADC1_CHANNEL_0)==ESP_OK) Serial.println("3 mode OK");
if (i2s_start(I2S_NUM_0)==ESP_OK) Serial.println("5 i2s OK");
}

void loop() {
int i= i2s_read_bytes(I2S_NUM_0, buf1, 32768*2, portMAX_DELAY);

Serial.println(i);

example_disp_buf((uint8_t*) buf1, 164);
delay(550);

### Debug Messages:
Out in Serial
1 driver OK
2 pin OK
3 mode OK
5 i2s OK
65536
======
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 ======
65536
======
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 
00 00 00 00 ======
65536

[hongthiet1994]

Did you slove this problem?

[wizz777]

No

[hongthiet1994]

No

Do you have skype account, can we discuss?

[Matheus-Garbelini]

Any progress?

[lbernstone]

The IDF example includes i2c_adc_enable(), which I'm guessing is the missing #4 in your list.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This stale issue has been automatically closed. Thank you for your contributions.