how do I Read flash and replay the sound via DAC

HyperUniverse
Posts: 33
Joined: Fri Oct 29, 2021 11:20 pm

how do I Read flash and replay the sound via DAC

Postby HyperUniverse » Wed Dec 08, 2021 2:26 pm

Hi,

in the example: i2s_adc_dac
How do I split an example task into two different tasks that I can access any time I want?

Code: Select all

/**
 * @brief I2S ADC/DAC example
 *        1. Erase flash
 *        2. Record audio from ADC and save in flash
 *        3. Read flash and replay the sound via DAC
 *        4. Play an example audio file(file format: 8bit/8khz/single channel)
 *        5. Loop back to step 3
 */
void example_i2s_adc_dac(void*arg)
{
    const esp_partition_t *data_partition = NULL;
    data_partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA,
            ESP_PARTITION_SUBTYPE_DATA_FAT, PARTITION_NAME);
    if (data_partition != NULL) {
        printf("partiton addr: 0x%08x; size: %d; label: %s\n", data_partition->address, data_partition->size, data_partition->label);
    } else {
        ESP_LOGE(TAG, "Partition error: can't find partition name: %s\n", PARTITION_NAME);
        vTaskDelete(NULL);
    }
    //1. Erase flash
    example_erase_flash();
    int i2s_read_len = EXAMPLE_I2S_READ_LEN;
    int flash_wr_size = 0;
    size_t bytes_read, bytes_written;

    //2. Record audio from ADC and save in flash
#if RECORD_IN_FLASH_EN
    char* i2s_read_buff = (char*) calloc(i2s_read_len, sizeof(char));
    uint8_t* flash_write_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));
    i2s_adc_enable(EXAMPLE_I2S_NUM);
    while (flash_wr_size < FLASH_RECORD_SIZE) {
        //read data from I2S bus, in this case, from ADC.
        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);
        //save original data from I2S(ADC) into flash.
        esp_partition_write(data_partition, flash_wr_size, i2s_read_buff, i2s_read_len);
        flash_wr_size += i2s_read_len;
        esp_rom_printf("Sound recording %u%%\n", flash_wr_size * 100 / FLASH_RECORD_SIZE);
    }
    i2s_adc_disable(EXAMPLE_I2S_NUM);
    free(i2s_read_buff);
    i2s_read_buff = NULL;
    free(flash_write_buff);
    flash_write_buff = NULL;
#endif

    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) {

        //3. Read flash and replay the sound via DAC
#if REPLAY_FROM_FLASH_EN
        for (int rd_offset = 0; rd_offset < flash_wr_size; rd_offset += FLASH_SECTOR_SIZE) {
            //read I2S(ADC) original data from flash
            esp_partition_read(data_partition, rd_offset, flash_read_buff, FLASH_SECTOR_SIZE);
            //process data and scale to 8bit for I2S DAC.
            example_i2s_adc_data_scale(i2s_write_buff, flash_read_buff, FLASH_SECTOR_SIZE);
            //send data
            i2s_write(EXAMPLE_I2S_NUM, i2s_write_buff, FLASH_SECTOR_SIZE, &bytes_written, portMAX_DELAY);
            printf("playing: %d %%\n", rd_offset * 100 / flash_wr_size);
        }
#endif

        //4. Play an example audio file(file format: 8bit/16khz/single channel)
        printf("Playing file example: \n");
        int offset = 0;
        int tot_size = sizeof(audio_table);
        example_set_file_play_mode();
        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;
            example_disp_buf((uint8_t*) i2s_write_buff, 32);
        }
        vTaskDelay(100 / portTICK_PERIOD_MS);
        example_reset_play_mode();
    }
    free(flash_read_buff);
    free(i2s_write_buff);
    vTaskDelete(NULL);
}
I'd like to have a single task for recording; and this seems to be working:

Code: Select all

/**
 * @brief I2S ADC/DAC example
 *        1. Erase flash
 *        2. Record audio from ADC and save in flash
 */
void Record_i2s_adc(void*arg)
{
    const esp_partition_t *data_partition = NULL;
    data_partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA,
            ESP_PARTITION_SUBTYPE_DATA_FAT, PARTITION_NAME);
    if (data_partition != NULL) {
        printf("partiton addr: 0x%08x; size: %d; label: %s\n", data_partition->address, data_partition->size, data_partition->label);
    } else {
        ESP_LOGE(TAG, "Partition error: can't find partition name: %s\n", PARTITION_NAME);
        vTaskDelete(NULL);
    }
    //1. Erase flash
    example_erase_flash();
    int i2s_read_len = EXAMPLE_I2S_READ_LEN;
    int flash_wr_size = 0;
    size_t bytes_read, bytes_written;

    //2. Record audio from ADC and save in flash
#if RECORD_IN_FLASH_EN
    char* i2s_read_buff = (char*) calloc(i2s_read_len, sizeof(char));
    uint8_t* flash_write_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));
    i2s_adc_enable(EXAMPLE_I2S_NUM);
    while (flash_wr_size < FLASH_RECORD_SIZE) {
        //read data from I2S bus, in this case, from ADC.
        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);
        //save original data from I2S(ADC) into flash.
        esp_partition_write(data_partition, flash_wr_size, i2s_read_buff, i2s_read_len);
        flash_wr_size += i2s_read_len;
        esp_rom_printf("Sound recording %u%%\n", flash_wr_size * 100 / FLASH_RECORD_SIZE);
    }
    i2s_adc_disable(EXAMPLE_I2S_NUM);
    free(i2s_read_buff);
    i2s_read_buff = NULL;
    free(flash_write_buff);
    flash_write_buff = NULL;
#endif

        vTaskDelay(100 / portTICK_PERIOD_MS);
        example_reset_play_mode();
    }
    free(flash_read_buff);
    free(i2s_write_buff);
    vTaskDelete(NULL);
}
But my second task crashes the ESP32:

Code: Select all

void Playback_i2s_dac(void*arg) {
    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) {

        //3. Read flash and replay the sound via DAC
#if REPLAY_FROM_FLASH_EN
        for (int rd_offset = 0; rd_offset < flash_wr_size; rd_offset += FLASH_SECTOR_SIZE) {
            //read I2S(ADC) original data from flash
            esp_partition_read(data_partition, rd_offset, flash_read_buff, FLASH_SECTOR_SIZE);
            //process data and scale to 8bit for I2S DAC.
            example_i2s_adc_data_scale(i2s_write_buff, flash_read_buff, FLASH_SECTOR_SIZE);
            //send data
            i2s_write(EXAMPLE_I2S_NUM, i2s_write_buff, FLASH_SECTOR_SIZE, &bytes_written, portMAX_DELAY);
            printf("playing: %d %%\n", rd_offset * 100 / flash_wr_size);
        }
#endif
          vTaskDelay(100 / portTICK_PERIOD_MS);
        example_reset_play_mode();
    }
    free(flash_read_buff);
    free(i2s_write_buff);
    vTaskDelete(NULL);
}

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