/**
* @brief Pauses and resumes playing on the audio codec.
* @param Cmd: AUDIO_PAUSE (or 0) to pause, AUDIO_RESUME (or any value different
* from 0) to resume.
* @retval o if correct communication, else wrong communication
*/
uint32_t Codec_PauseResume(uint32_t Cmd)
{
uint32_t counter = 0;
/* Pause the audio file playing */
if (Cmd == AUDIO_PAUSE)
{
/* Mute the output first */
counter += Codec_Mute(AUDIO_MUTE_ON);
/* Put the Codec in Power save mode */
counter += Codec_WriteRegister(0x02, 0x01);
}
else /* AUDIO_RESUME */
{
/* Unmute the output first */
counter += Codec_Mute(AUDIO_MUTE_OFF);
counter += Codec_WriteRegister(0x04, OutputDev);
/* Exit the Power save mode */
counter += Codec_WriteRegister(0x02, 0x9E);
}
return counter;
}
/**
* @brief Stops audio Codec playing. It powers down the codec.
* @param CodecPdwnMode: selects the power down mode.
* @arg CODEC_PDWN_SW: only mutes the audio codec. When resuming from this
* mode the codec keeps the prvious initialization (no need to re-Initialize
* the codec registers).
* @arg CODEC_PDWN_HW: Physically power down the codec. When resuming from this
* mode, the codec is set to default configuration (user should re-Initialize
* the codec in order to play again the audio stream).
* @retval o if correct communication, else wrong communication
*/
uint32_t Codec_Stop(uint32_t CodecPdwnMode)
{
uint32_t counter = 0;
/* Mute the output first */
Codec_Mute(AUDIO_MUTE_ON);
if (CodecPdwnMode == CODEC_PDWN_SW)
{
/* Power down the DAC and the speaker (PMDAC and PMSPK bits)*/
counter += Codec_WriteRegister(0x02, 0x9F);
}
else /* CODEC_PDWN_HW */
{
/* Power down the DAC components */
counter += Codec_WriteRegister(0x02, 0x9F);
/* Wait at least 100ms */
Delay(0xFFF);
/* Reset The pin */
IOE_WriteIOPin(AUDIO_RESET_PIN, BitReset);
}
return counter;
}
/**
* @brief Stops audio Codec playing. It powers down the codec.
* @param CodecPdwnMode: selects the power down mode.
* - CODEC_PDWN_SW: only mutes the audio codec. When resuming from this
* mode the codec keeps the previous initialization
* (no need to re-Initialize the codec registers).
* - CODEC_PDWN_HW: Physically power down the codec. When resuming from this
* mode, the codec is set to default configuration
* (user should re-Initialize the codec in order to
* play again the audio stream).
* @retval 0 if correct communication, else wrong communication
*/
static uint32_t Codec_Stop(uint32_t CodecPdwnMode)
{
uint32_t counter = 0;
/* Mute the output first */
Codec_Mute(AUDIO_MUTE_ON);
if (CodecPdwnMode == CODEC_PDWN_SW) {
/* Power down the speaker (PMSPK bits) */
counter += Codec_WriteRegister(0x02, 0x9F);
} else { /* CODEC_PDWN_HW */
/* Power down the components */
counter += Codec_WriteRegister(0x02, 0x9F);
/* Wait at least 100us */
Delay(0xFFF);
/* Reset The pin */
GPIO_WriteBit(AUDIO_RESET_GPIO, AUDIO_RESET_PIN, Bit_RESET);
}
return counter;
}
/**
* @brief Enable or disable the MUTE mode by software
* @param Command: could be AUDIO_MUTE_ON to mute sound or AUDIO_MUTE_OFF to
* unmute the codec and restore previous volume level.
* @retval o if correct communication, else wrong communication
*/
uint32_t EVAL_AUDIO_Mute(uint32_t Cmd)
{
/* Call the Codec Mute function */
return (Codec_Mute(Cmd));
}
