Also tried wrapping
i2s_read() in
i2s_adc_enable and
i2s_adc_disable but that did not work.
Here is the entire striped down example file I am using. You can see where I launch the wifi station at the bottom of
app_main
Code: Select all
#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_spi_flash.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_partition.h"
#include "driver/i2s.h"
#include "driver/adc.h"
#include "audio_example_file.h"
#include "esp_adc_cal.h"
static const char* TAG = "ad/da";
#include "station/station_example_main.c"
#define V_REF 1100
#define ADC1_TEST_CHANNEL (ADC1_CHANNEL_7)
#define EXAMPLE_I2S_NUM (0)
#define EXAMPLE_I2S_SAMPLE_RATE (16000)
#define EXAMPLE_I2S_SAMPLE_BITS (16)
#define EXAMPLE_I2S_BUF_DEBUG (1)
#define EXAMPLE_I2S_READ_LEN (16 * 1024)
#define EXAMPLE_I2S_FORMAT (I2S_CHANNEL_FMT_RIGHT_LEFT)
#define EXAMPLE_I2S_CHANNEL_NUM ((EXAMPLE_I2S_FORMAT < I2S_CHANNEL_FMT_ONLY_RIGHT) ? (2) : (1))
#define I2S_ADC_UNIT ADC_UNIT_1
#define I2S_ADC_CHANNEL ADC1_CHANNEL_7
void example_i2s_init(void)
{
int i2s_num = EXAMPLE_I2S_NUM;
i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN | I2S_MODE_ADC_BUILT_IN,
.sample_rate = EXAMPLE_I2S_SAMPLE_RATE,
.bits_per_sample = EXAMPLE_I2S_SAMPLE_BITS,
.communication_format = I2S_COMM_FORMAT_PCM,
.channel_format = EXAMPLE_I2S_FORMAT,
.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);
i2s_set_dac_mode(I2S_DAC_CHANNEL_BOTH_EN);
i2s_set_adc_mode(I2S_ADC_UNIT, I2S_ADC_CHANNEL);
}
void example_disp_buf(uint8_t* buf, int length)
{
#if EXAMPLE_I2S_BUF_DEBUG
printf("======\n");
for (int i = 0; i < length; i++) {
printf("%02x ", buf[i]);
if ((i + 1) % 8 == 0) {
printf("\n");
}
}
printf("======\n");
#endif
}
int example_i2s_dac_data_scale(uint8_t* d_buff, uint8_t* s_buff, uint32_t len)
{
uint32_t j = 0;
#if (EXAMPLE_I2S_SAMPLE_BITS == 16)
for (int i = 0; i < len; i++) {
d_buff[j++] = 0;
d_buff[j++] = s_buff[i];
}
return (len * 2);
#else
for (int i = 0; i < len; i++) {
d_buff[j++] = 0;
d_buff[j++] = 0;
d_buff[j++] = 0;
d_buff[j++] = s_buff[i];
}
return (len * 4);
#endif
}
void example_i2s_adc_dac(void*arg)
{
int i2s_read_len = EXAMPLE_I2S_READ_LEN;
int flash_wr_size = 0;
size_t bytes_read, bytes_written;
uint8_t* flash_read_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));
uint8_t* i2s_write_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));
while (1) {
printf("Playing file example: \n");
int offset = 0;
int tot_size = sizeof(audio_table);
while (offset < tot_size) {
int play_len = ((tot_size - offset) > (4 * 1024)) ? (4 * 1024) : (tot_size - offset);
int i2s_wr_len = example_i2s_dac_data_scale(i2s_write_buff, (uint8_t*)(audio_table + offset), play_len);
i2s_write(EXAMPLE_I2S_NUM, i2s_write_buff, i2s_wr_len, &bytes_written, portMAX_DELAY);
offset += play_len;
}
}
}
void adc_read_task(void* arg)
{
size_t bytes_read;
int i2s_read_len = EXAMPLE_I2S_READ_LEN;
char* i2s_read_buff = (char*) calloc(i2s_read_len, sizeof(char));
while(1) {
// i2s_adc_enable(EXAMPLE_I2S_NUM);
i2s_read(EXAMPLE_I2S_NUM, (void*) i2s_read_buff, i2s_read_len, &bytes_read, portMAX_DELAY);
example_disp_buf((uint8_t*) i2s_read_buff, 64);
// i2s_adc_disable(EXAMPLE_I2S_NUM);
}
}
esp_err_t app_main(void)
{
example_i2s_init();
esp_log_level_set("I2S", ESP_LOG_INFO);
xTaskCreate(example_i2s_adc_dac, "example_i2s_adc_dac", 1024 * 2, NULL, 5, NULL);
xTaskCreate(adc_read_task, "ADC read task", 2048, NULL, 5, NULL);
station_main();
return ESP_OK;
}