/*******************************************************************************
* Function Name: I2S_Wakeup
********************************************************************************
*
* Summary:
* Prepares I2S to wake up.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Global Variables:
* I2S_backup - used when non-retention registers are restored.
*
* Reentrant:
* Yes.
*
*******************************************************************************/
void I2S_Wakeup(void)
{
/* Restore registers values */
I2S_RestoreConfig();
if(0u != I2S_backup.enableState)
{
/* Enable component's operation */
I2S_Enable();
/* Enable Tx/Rx direction if they were enabled before sleep */
#if(I2S_TX_DIRECTION_ENABLE)
if(0u != (I2S_backup.CtrlReg & I2S_TX_EN))
{
I2S_EnableTx();
}
#endif /* (I2S_TX_DIRECTION_ENABLE) */
#if(I2S_RX_DIRECTION_ENABLE)
if(0u != (I2S_backup.CtrlReg & I2S_RX_EN))
{
I2S_EnableRx();
}
#endif /* (I2S_RX_DIRECTION_ENABLE) */
}
}
/*******************************************************************************
* Function Name: I2S_Start
********************************************************************************
*
* Summary:
* Starts the I2S interface.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Global Variables:
* I2S_initVar - used to check initial configuration, modified on
* first function call.
*
* Reentrant:
* No.
*
*******************************************************************************/
void I2S_Start(void)
{
/* Writes Tx and/or Rx interrupt source values provided for customizer */
if(0u == I2S_initVar)
{
I2S_Init();
I2S_initVar = 1u;
}
I2S_Enable();
}
void I2S_RxEnable(I2S_Type *base, bool enable)
{
if (enable)
{
I2S_EnableInterrupts(base, kI2S_RxErrorFlag | kI2S_RxLevelFlag);
I2S_Enable(base);
}
else
{
I2S_DisableInterrupts(base, kI2S_RxErrorFlag | kI2S_RxLevelFlag);
I2S_Disable(base);
base->FIFOCFG |= I2S_FIFOCFG_EMPTYRX_MASK;
}
}
void CodecController::start(){
// setPin(GPIOA, GPIO_Pin_7); // DEBUG
setActive(true);
if(isMaster()){
/* The I2S peripheral must be enabled when the external master sets the WS line at: */
if(getProtocol() == I2S_PROTOCOL_PHILIPS){
while(getPin(CODEC_I2S_GPIO, CODEC_I2S_WS_PIN)); // wait for low
/* High level when the I2S protocol is selected. */
while(!getPin(CODEC_I2S_GPIO, CODEC_I2S_WS_PIN)); // wait for high
}else{
while(!getPin(CODEC_I2S_GPIO, CODEC_I2S_WS_PIN)); // wait for high
/* Low level when the LSB or MSB-justified mode is selected. */
while(getPin(CODEC_I2S_GPIO, CODEC_I2S_WS_PIN)); // wait for low
}
}
I2S_Enable();
I2S_Run();
}
