/*
** Enable all the peripherals in use
*/
static void PeripheralsSetup(void)
{
/* pin mux for I2C */
I2CPinMuxSetup(0);
/* PSC for McASP and EDMA, pinmux for McASP*/
PSCModuleControl(SOC_PSC_1_REGS, HW_PSC_MCASP0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_CC0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_TC0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
McASPPinMuxSetup();
}
/*
** The main function. Application starts here.
*/
int main(void)
{
unsigned short parToSend;
unsigned short parToLink;
/* Set up pin mux for I2C module 0 */
I2CPinMuxSetup(0);
McASPPinMuxSetup();
/* Power up the McASP module */
PSCModuleControl(SOC_PSC_1_REGS, HW_PSC_MCASP0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
/* Power up EDMA3CC_0 and EDMA3TC_0 */
PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_CC0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_TC0, PSC_POWERDOMAIN_ALWAYS_ON,
PSC_MDCTL_NEXT_ENABLE);
#ifdef _TMS320C6X
// Initialize the DSP interrupt controller
IntDSPINTCInit();
#else
/* Initialize the ARM Interrupt Controller.*/
IntAINTCInit();
#endif
/* Initialize the I2C 0 interface for the codec AIC31 */
I2CCodecIfInit(SOC_I2C_0_REGS, INT_CHANNEL_I2C, I2C_SLAVE_CODEC_AIC31);
EDMA3Init(SOC_EDMA30CC_0_REGS, 0);
EDMA3IntSetup();
McASPErrorIntSetup();
#ifdef _TMS320C6X
IntGlobalEnable();
#else
/* Enable the interrupts generation at global level */
IntMasterIRQEnable();
IntGlobalEnable();
IntIRQEnable();
#endif
/*
** Request EDMA channels. Channel 0 is used for reception and
** Channel 1 is used for transmission
*/
EDMA3RequestChannel(SOC_EDMA30CC_0_REGS, EDMA3_CHANNEL_TYPE_DMA,
EDMA3_CHA_MCASP0_TX, EDMA3_CHA_MCASP0_TX, 0);
EDMA3RequestChannel(SOC_EDMA30CC_0_REGS, EDMA3_CHANNEL_TYPE_DMA,
EDMA3_CHA_MCASP0_RX, EDMA3_CHA_MCASP0_RX, 0);
/* Initialize the DMA parameters */
I2SDMAParamInit();
/* Configure the Codec for I2S mode */
AIC31I2SConfigure();
/* Configure the McASP for I2S */
McASPI2SConfigure();
/* Activate the audio transmission and reception */
I2SDataTxRxActivate();
/*
** Looop forever. if a new buffer is received, the lastFullRxBuf will be
** updated in the rx completion ISR. if it is not the lastSentTxBuf,
** buffer is to be sent. This has to be mapped to proper paRAM set.
*/
while(1)
{
if(lastFullRxBuf != lastSentTxBuf)
{
/*
** Start the transmission from the link paramset. The param set
** 1 will be linked to param set at PAR_TX_START. So do not
** update paRAM set1.
*/
parToSend = PAR_TX_START + (parOffTxToSend % NUM_PAR);
parOffTxToSend = (parOffTxToSend + 1) % NUM_PAR;
parToLink = PAR_TX_START + parOffTxToSend;
lastSentTxBuf = (lastSentTxBuf + 1) % NUM_BUF;
ByteBuftoFloatBuf(rxBufPtr[lastFullRxBuf]);
/* Copy the buffer */
memcpy((void *)txBufPtr[lastSentTxBuf],
(void *)rxBufPtr[lastFullRxBuf],
AUDIO_BUF_SIZE);
/*
** Send the buffer by setting the DMA params accordingly.
** Here the buffer to send and number of samples are passed as
** parameters. This is important, if only transmit section
** is to be used.
*/
BufferTxDMAActivate(lastSentTxBuf, NUM_SAMPLES_PER_AUDIO_BUF,
(unsigned short)parToSend,
(unsigned short)parToLink);
}
}
}
