/**
* @brief Initializes the Audio Codec audio interface (I2S)
* @param AudioFreq: Audio frequency to be configured for the I2S peripheral.
*/
static void I2SOUT_Init(uint32_t AudioFreq)
{
/* Initialize the hAudioOutI2s Instance parameter */
hAudioOutI2s.Instance = I2SOUT;
/* Disable I2S block */
__HAL_I2S_DISABLE(&hAudioOutI2s);
/* Perform MSP initialization at first function call */
if(HAL_I2S_GetState(&hAudioOutI2s) == HAL_I2S_STATE_RESET)
{
I2SOUT_MspInit();
}
/* I2SOUT peripheral configuration */
hAudioOutI2s.Init.AudioFreq = AudioFreq;
hAudioOutI2s.Init.CPOL = I2S_CPOL_LOW;
hAudioOutI2s.Init.DataFormat = I2S_DATAFORMAT_16B;
hAudioOutI2s.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE;
hAudioOutI2s.Init.Mode = I2S_MODE_MASTER_TX;
hAudioOutI2s.Init.Standard = I2S_STANDARD;
/* Initialize the I2S peripheral with the structure above */
HAL_I2S_Init(&hAudioOutI2s);
}
/**
* @brief Initializes the Audio Codec audio interface (I2S)
* @note This function assumes that the I2S input clock (through PLL_R in
* Devices RevA/Z and through dedicated PLLI2S_R in Devices RevB/Y)
* is already configured and ready to be used.
* @param AudioFreq: Audio frequency to be configured for the I2S peripheral.
* @retval None
*/
static void I2S2_Init(uint32_t AudioFreq)
{
/* Initialize the hAudioInI2s Instance parameter */
hAudioInI2s.Instance = I2S2;
/* Disable I2S block */
__HAL_I2S_DISABLE(&hAudioInI2s);
/* I2S2 peripheral configuration */
hAudioInI2s.Init.AudioFreq = 2 * AudioFreq;
hAudioInI2s.Init.ClockSource = I2S_CLOCK_PLL;
hAudioInI2s.Init.CPOL = I2S_CPOL_HIGH;
hAudioInI2s.Init.DataFormat = I2S_DATAFORMAT_16B;
hAudioInI2s.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
hAudioInI2s.Init.Mode = I2S_MODE_MASTER_RX;
hAudioInI2s.Init.Standard = I2S_STANDARD_LSB;
/* Initialize the I2S peripheral with the structure above */
if(HAL_I2S_GetState(&hAudioInI2s) == HAL_I2S_STATE_RESET)
{
I2S2_MspInit();
}
HAL_I2S_Init(&hAudioInI2s);
}
/**
* @brief Initializes the Audio Codec audio interface (I2S)
* @param AudioFreq: Audio frequency to be configured for the I2S peripheral.
* @retval AUDIO_StatusTypeDef AUDIO Status
*/
static AUDIO_StatusTypeDef I2Sx_Init(uint32_t AudioFreq)
{
/* I2S peripheral configuration */
hAudioOutI2s.Init.AudioFreq = AudioFreq;
hAudioOutI2s.Init.ClockSource = I2S_CLOCK_SYSCLK;
hAudioOutI2s.Init.CPOL = I2S_CPOL_LOW;
hAudioOutI2s.Init.DataFormat = I2S_DATAFORMAT_16B;
hAudioOutI2s.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE;
hAudioOutI2s.Init.Mode = I2S_MODE_MASTER_TX;
hAudioOutI2s.Init.Standard = I2S_STANDARD;
hAudioOutI2s.Instance = I2Sx;
/* Disable I2S block */
__HAL_I2S_DISABLE(&hAudioOutI2s);
/* Initialize the I2S peripheral with the structure above */
if(HAL_I2S_GetState(&hAudioOutI2s) == HAL_I2S_STATE_RESET)
{
I2Sx_MspInit();
}
if (HAL_I2S_Init(&hAudioOutI2s) != HAL_OK)
{
return AUDIO_ERROR;
}
return AUDIO_OK;
}
/**
* @brief Initializes the Audio Codec audio interface (I2S).
* @param AudioFreq: Audio frequency to be configured for the I2S peripheral.
* @retval None
*/
static void I2Sx_Init(uint32_t AudioFreq)
{
/* Initialize the haudio_i2s Instance parameter */
haudio_i2s.Instance = AUDIO_I2Sx;
/* Disable I2S block */
__HAL_I2S_DISABLE(&haudio_i2s);
haudio_i2s.Init.Mode = I2S_MODE_MASTER_TX;
haudio_i2s.Init.Standard = I2S_STANDARD;
haudio_i2s.Init.DataFormat = I2S_DATAFORMAT_16B;
haudio_i2s.Init.AudioFreq = AudioFreq;
haudio_i2s.Init.CPOL = I2S_CPOL_LOW;
haudio_i2s.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE;
if(HAL_I2S_GetState(&haudio_i2s) == HAL_I2S_STATE_RESET)
{
I2Sx_MspInit();
}
/* Init the I2S */
HAL_I2S_Init(&haudio_i2s);
}
