/*
** Configures the McASP Transmit Section for 2 channels in I2S mode.
*/
static void McASPI2STwoChanConfig(void)
{
McASPTxReset(MCASP_INST_BASE);
/* Enable the FIFOs for DMA transfer */
McASPWriteFifoEnable(MCASP_FIFO_REGS, 1, 1);
/* Set I2S format in the transmitter/receiver format units */
McASPTxFmtI2SSet(MCASP_INST_BASE, TONE_WORD_SIZE, TONE_SLOT_SIZE,
MCASP_TX_MODE_DMA);
McASPTxFrameSyncCfg(MCASP_INST_BASE, 2, MCASP_TX_FS_WIDTH_WORD,
MCASP_TX_FS_EXT_BEGIN_ON_RIS_EDGE);
/* configure the clock for transmitter */
McASPTxClkCfg(MCASP_INST_BASE, MCASP_TX_CLK_EXTERNAL, 0, 0);
McASPTxClkPolaritySet(MCASP_INST_BASE, MCASP_TX_CLK_POL_FALL_EDGE);
McASPTxClkCheckConfig(MCASP_INST_BASE, MCASP_TX_CLKCHCK_DIV32,
0x00, 0xFF);
/* Enable the transmitter/receiver slots. I2S uses 2 slots */
McASPTxTimeSlotSet(MCASP_INST_BASE, I2S_SLOTS_L_R);
/* Set the serializer as transmitter */
McASPSerializerTxSet(MCASP_INST_BASE, MCASP_XSER_TX);
/*
** Configure the McASP pins
** Input - Frame Sync, Clock and Serializer 12
** Output - Serializer 11 is connected to the input of the codec
*/
McASPPinMcASPSet(MCASP_INST_BASE, 0xFFFFFFFF);
McASPPinDirOutputSet(MCASP_INST_BASE, MCASP_PIN_AXR(MCASP_XSER_TX));
McASPPinDirInputSet(MCASP_INST_BASE, MCASP_PIN_AFSX
| MCASP_PIN_ACLKX);
}
/*
** Configures the McASP Transmit Section in I2S mode.
*/
static void McASPI2SConfigure(void)
{
McASPRxReset(SOC_MCASP_0_CTRL_REGS);
McASPTxReset(SOC_MCASP_0_CTRL_REGS);
/* Enable the FIFOs for DMA transfer */
McASPReadFifoEnable(SOC_MCASP_0_FIFO_REGS, 1, 1);
McASPWriteFifoEnable(SOC_MCASP_0_FIFO_REGS, 1, 1);
/* Set I2S format in the transmitter/receiver format units */
McASPRxFmtI2SSet(SOC_MCASP_0_CTRL_REGS, WORD_SIZE, SLOT_SIZE,
MCASP_RX_MODE_DMA);
McASPTxFmtI2SSet(SOC_MCASP_0_CTRL_REGS, WORD_SIZE, SLOT_SIZE,
MCASP_TX_MODE_DMA);
/* Configure the frame sync. I2S shall work in TDM format with 2 slots */
McASPRxFrameSyncCfg(SOC_MCASP_0_CTRL_REGS, 2, MCASP_RX_FS_WIDTH_WORD,
MCASP_RX_FS_EXT_BEGIN_ON_RIS_EDGE);
McASPTxFrameSyncCfg(SOC_MCASP_0_CTRL_REGS, 2, MCASP_TX_FS_WIDTH_WORD,
MCASP_TX_FS_EXT_BEGIN_ON_RIS_EDGE);
/* configure the clock for receiver */
McASPRxClkCfg(SOC_MCASP_0_CTRL_REGS, MCASP_RX_CLK_EXTERNAL, 0, 0);
McASPRxClkPolaritySet(SOC_MCASP_0_CTRL_REGS, MCASP_RX_CLK_POL_RIS_EDGE);
McASPRxClkCheckConfig(SOC_MCASP_0_CTRL_REGS, MCASP_RX_CLKCHCK_DIV32,
0x00, 0xFF);
/* configure the clock for transmitter */
McASPTxClkCfg(SOC_MCASP_0_CTRL_REGS, MCASP_TX_CLK_EXTERNAL, 0, 0);
McASPTxClkPolaritySet(SOC_MCASP_0_CTRL_REGS, MCASP_TX_CLK_POL_FALL_EDGE);
McASPTxClkCheckConfig(SOC_MCASP_0_CTRL_REGS, MCASP_TX_CLKCHCK_DIV32,
0x00, 0xFF);
/* Enable synchronization of RX and TX sections */
McASPTxRxClkSyncEnable(SOC_MCASP_0_CTRL_REGS);
/* Enable the transmitter/receiver slots. I2S uses 2 slots */
McASPRxTimeSlotSet(SOC_MCASP_0_CTRL_REGS, I2S_SLOTS);
McASPTxTimeSlotSet(SOC_MCASP_0_CTRL_REGS, I2S_SLOTS);
/*
** Set the serializers, Currently only one serializer is set as
** transmitter and one serializer as receiver.
*/
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, MCASP_XSER_RX);
McASPSerializerTxSet(SOC_MCASP_0_CTRL_REGS, MCASP_XSER_TX);
/*
** Configure the McASP pins
** Input - Frame Sync, Clock and Serializer Rx
** Output - Serializer Tx is connected to the input of the codec
*/
McASPPinMcASPSet(SOC_MCASP_0_CTRL_REGS, 0xFFFFFFFF);
McASPPinDirOutputSet(SOC_MCASP_0_CTRL_REGS, MCASP_PIN_AXR(MCASP_XSER_TX));
McASPPinDirInputSet(SOC_MCASP_0_CTRL_REGS, MCASP_PIN_AFSX
| MCASP_PIN_ACLKX
| MCASP_PIN_AFSR
| MCASP_PIN_ACLKR
| MCASP_PIN_AXR(MCASP_XSER_RX));
/* Enable error interrupts for McASP */
McASPTxIntEnable(SOC_MCASP_0_CTRL_REGS, MCASP_TX_DMAERROR
| MCASP_TX_CLKFAIL
| MCASP_TX_SYNCERROR
| MCASP_TX_UNDERRUN);
McASPRxIntEnable(SOC_MCASP_0_CTRL_REGS, MCASP_RX_DMAERROR
| MCASP_RX_CLKFAIL
| MCASP_RX_SYNCERROR
| MCASP_RX_OVERRUN);
}