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Removed unused define and added mck pin definition to i2s_pin_config

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Changes on the pin configuration

Fixed the pin setup and minor improvements
This commit is contained in:
pedro.minatel 2021-08-19 13:37:12 +01:00
parent d4b47c42eb
commit e736c20cc9
1 changed files with 25 additions and 24 deletions
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49
examples/peripherals/i2s/i2s_audio_recorder_sdcard/main/i2s_recorder_main.c
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@ -8,18 +8,17 @@
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/unistd.h>
#include <sys/stat.h>
#include "esp_log.h"
#include "esp_err.h"
#include "esp_system.h"
#include "esp_vfs_fat.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2s.h"
#include "driver/gpio.h"
#include "esp_system.h"
#include <math.h>
#include "esp_log.h"
#include <sys/unistd.h>
#include <sys/stat.h>
#include "esp_err.h"
#include "esp_vfs_fat.h"
#include "driver/sdspi_host.h"
#include "driver/spi_common.h"
#include "sdmmc_cmd.h"
#include "sdkconfig.h"
@ -27,9 +26,8 @@
static const char* TAG = "pdm_rec_example";
#define AUDIO_SAMPLE_SIZE (CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE * 1024)
#define SAMPLES_NUM ((CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE/100) * 2)
#define BYTE_RATE (1 * CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE * ((CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE / 8))
#define FLASH_RECORD_SIZE (BYTE_RATE * CONFIG_EXAMPLE_REC_TIME))
#define BYTE_RATE 1 * CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE * (CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE / 8)
#define FLASH_RECORD_SIZE BYTE_RATE * CONFIG_EXAMPLE_REC_TIME
#define SD_MOUNT_POINT "/sdcard"
#define SPI_DMA_CHAN (1)
@ -104,7 +102,7 @@ void wavHeader(char* wav_header, uint32_t wav_size, uint32_t sample_rate){
// See this for reference: http://soundfile.sapp.org/doc/WaveFormat/
uint32_t file_size = wav_size + WAVE_HEADER_SIZE - 8;
uint32_t byte_rate = 1 * CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE * (CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE / 8);
uint32_t byte_rate = BYTE_RATE;
const char set_wav_header[] = {
'R','I','F','F', // ChunkID
@ -154,7 +152,7 @@ void record_wav(void)
// Start recording
while (flash_wr_size < FLASH_RECORD_SIZE) {
// Read the RAW samples from the microphone
i2s_read(CONFIG_EXAMPLE_I2S_CH, (char *)i2s_readraw_buff, AUDIO_SAMPLE_SIZE, &bytes_read, portMAX_DELAY);
i2s_read(CONFIG_EXAMPLE_I2S_CH, (char *)i2s_readraw_buff, AUDIO_SAMPLE_SIZE, &bytes_read, 100);
// Write the samples to the WAV file
fwrite(i2s_readraw_buff, 1, bytes_read, f);
flash_wr_size += bytes_read;
@ -179,21 +177,24 @@ void init_microphone(void)
.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
.communication_format = I2S_COMM_FORMAT_STAND_I2S,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
.dma_buf_count = 64,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL2,
.dma_buf_count = 8,
.dma_buf_len = 1024,
.use_apll = 1
.use_apll = 1,
};
i2s_pin_config_t pin_config;
pin_config.bck_io_num = I2S_PIN_NO_CHANGE;
pin_config.ws_io_num = CONFIG_EXAMPLE_I2S_CLK_GPIO;
pin_config.data_out_num = I2S_PIN_NO_CHANGE;
pin_config.data_in_num = CONFIG_EXAMPLE_I2S_DATA_GPIO;
i2s_pin_config_t pin_config = {
.mck_io_num = I2S_PIN_NO_CHANGE,
.bck_io_num = I2S_PIN_NO_CHANGE,
.ws_io_num = CONFIG_EXAMPLE_I2S_CLK_GPIO,
.data_out_num = I2S_PIN_NO_CHANGE,
.data_in_num = CONFIG_EXAMPLE_I2S_DATA_GPIO,
};
i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL);
i2s_set_pin(CONFIG_EXAMPLE_I2S_CH, &pin_config);
i2s_set_clk(CONFIG_EXAMPLE_I2S_CH, CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE, I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO);
ESP_ERROR_CHECK( i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL) );
ESP_ERROR_CHECK( i2s_set_pin(CONFIG_EXAMPLE_I2S_CH, &pin_config) );
// Set the I2S clock using the sample rate divided by 2 if channel is mono
ESP_ERROR_CHECK( i2s_set_clk(CONFIG_EXAMPLE_I2S_CH, (CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE / 2), I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO) );
}
void app_main(void)