/**
* @brief Stops audio recording.
* @param Option: could be one of the following parameters
* - CODEC_PDWN_SW: for software power off (by writing registers).
* Then no need to reconfigure the Codec after power on.
* - CODEC_PDWN_HW: completely shut down the codec (physically).
* Then need to reconfigure the Codec after power on.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_Stop(uint32_t Option)
{
/* Call the Media layer stop function */
HAL_SAI_DMAStop(&haudio_in_sai);
/* Call Audio Codec Stop function */
if(audio_drv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}
else
{
if(Option == CODEC_PDWN_HW)
{
/* Wait at least 100us */
HAL_Delay(1);
}
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Stops audio playing and Power down the Audio Codec.
* @param Option: could be one of the following parameters
* - CODEC_PDWN_SW: for software power off (by writing registers).
* Then no need to reconfigure the Codec after power on.
* - CODEC_PDWN_HW: completely shut down the codec (physically).
* Then need to reconfigure the Codec after power on.
* @retval BSP AUDIO status
*/
uint8_t BSP_AUDIO_OUT_Stop(uint32_t Option)
{
/* Call Audio Codec Stop function */
if (hAudioOut.AudioDrv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}
if(Option == CODEC_PDWN_HW)
{
/* Wait at least 100us */
HAL_Delay(1);
}
/* Stop DMA transfer of PCM samples towards the serial audio interface */
if (HAL_SAI_DMAStop(&BSP_AUDIO_hSai)!= HAL_OK)
{
return AUDIO_ERROR;
}
return AUDIO_OK;
}
int playback_from_flash(void)
{
int ret = 0;
int i;
int pos_buff = 0;
uint32_t pos_flash = 0;
uint32_t part_len = DATA_BUFF_LEN / 2;
uint32_t part_bytes = part_len * SAI_DATA_BYTES;
uint32_t total_size = get_audio_part_len();
if (!aos_mutex_is_valid(&sai_mutex)) {
KIDS_A10_PRT("aos_mutex_is_valid return false.\n");
return -1;
}
ret = aos_mutex_lock(&sai_mutex, SAI_WAIT_TIMEOUT);
if (ret != 0) {
KIDS_A10_PRT("SAI is very busy now.\n");
return -1;
}
if (!aos_sem_is_valid(&audio_sem)) {
KIDS_A10_PRT("aos_sem_is_valid return false.\n");
ret = -1;
goto PB_EXIT;
}
ret = reinit_sai_and_dma(SAI_dir_tx_m2p);
if (ret != 0) {
ret = -1;
goto PB_EXIT;
}
printf("Playback time is %f seconds!\n", get_run_time());
#ifdef FLASH_MONO_DATA
ret = hal_flash_read(PART_FOR_AUDIO, &pos_flash, &data_buff[pos_buff], part_bytes);
if (ret != 0) {
ret = -1;
goto PB_EXIT;
}
ready_to_send(data_buff, part_len);
ret = HAL_SAI_Transmit_DMA(&hsai_BlockA1, (uint8_t *)data_buff, DATA_BUFF_LEN);
if (ret != 0) {
KIDS_A10_PRT("HAL_SAI_Transmit_DMA return failed.\n");
ret = -1;
goto PB_EXIT;
}
while (1) {
/* Wait a callback event */
while (UpdatePointer == -1) {
aos_sem_wait(&audio_sem, DMA_WAIT_TIMEOUT);
if (ret != 0)
KIDS_A10_PRT("DMA timeout.\n");
}
pos_buff = UpdatePointer;
UpdatePointer = -1;
/* Upate the first or the second part of the buffer */
ret = hal_flash_read(PART_FOR_AUDIO, &pos_flash, &data_buff[pos_buff], part_bytes / 2);
if (ret != 0) {
ret = -1;
break;
}
ready_to_send(&data_buff[pos_buff], part_len / 2);
/* check the end of the file */
if ((pos_flash + part_bytes / 2) > total_size) {
ret = HAL_SAI_DMAStop(&hsai_BlockA1);
if (ret != 0) {
KIDS_A10_PRT("HAL_SAI_DMAStop return failed.\n");
ret = -1;
}
break;
}
if (UpdatePointer != -1) {
/* Buffer update time is too long compare to the data transfer time */
KIDS_A10_PRT("UpdatePointer error.\n");
ret = -1;
break;
}
}
#else
ret = hal_flash_read(PART_FOR_AUDIO, &pos_flash, &data_buff[pos_buff], DATA_BUFF_LEN * SAI_DATA_BYTES);
if (ret != 0) {
ret = -1;
goto PB_EXIT;
}
ret = HAL_SAI_Transmit_DMA(&hsai_BlockA1, (uint8_t *)data_buff, DATA_BUFF_LEN);
if (ret != 0) {
KIDS_A10_PRT("HAL_SAI_Transmit_DMA return failed.\n");
ret = -1;
goto PB_EXIT;
}
while (1) {
/* Wait a callback event */
while (UpdatePointer == -1) {
aos_sem_wait(&audio_sem, DMA_WAIT_TIMEOUT);
if (ret != 0)
KIDS_A10_PRT("DMA timeout.\n");
}
pos_buff = UpdatePointer;
UpdatePointer = -1;
/* Upate the first or the second part of the buffer */
ret = hal_flash_read(PART_FOR_AUDIO, &pos_flash, &data_buff[pos_buff], part_bytes);
if (ret != 0) {
ret = -1;
break;
}
/* check the end of the file */
if ((pos_flash + part_bytes) > total_size) {
ret = HAL_SAI_DMAStop(&hsai_BlockA1);
if (ret != 0) {
KIDS_A10_PRT("HAL_SAI_DMAStop return failed.\n");
ret = -1;
}
break;
}
if (UpdatePointer != -1) {
/* Buffer update time is too long compare to the data transfer time */
KIDS_A10_PRT("UpdatePointer error.\n");
ret = -1;
break;
}
}
#endif
PB_EXIT:
ret = aos_mutex_unlock(&sai_mutex);
if (ret != 0) {
KIDS_A10_PRT("SAI release failed.\n");
}
return ret;
}
