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);
}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);
}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);
}