我的McASP配置分别如下：
管脚的复用设置是：
void McASPPinMuxSetup(void)
{
unsigned int savePinMux = 0;
savePinMux = HWREG(SOC_SYSCFG_0_REGS + SYSCFG0_PINMUX(0)) & \
~(SYSCFG_PINMUX0_PINMUX0_27_24 | \
SYSCFG_PINMUX0_PINMUX0_23_20 | \
SYSCFG_PINMUX0_PINMUX0_19_16 | \
SYSCFG_PINMUX0_PINMUX0_15_12 | \
SYSCFG_PINMUX0_PINMUX0_11_8 | \
SYSCFG_PINMUX0_PINMUX0_7_4 | \
SYSCFG_PINMUX0_PINMUX0_3_0);
HWREG(SOC_SYSCFG_0_REGS + SYSCFG0_PINMUX(0)) = \
(PINMUX0_MCASP0_AMUTE_ENABLE | PINMUX0_MCASP0_AHCLKX_ENABLE | \
PINMUX0_MCASP0_AHCLKR_ENABLE | PINMUX0_MCASP0_AFSX_ENABLE | \
PINMUX0_MCASP0_AFSR_ENABLE | PINMUX0_MCASP0_ACLKX_ENABLE | \
PINMUX0_MCASP0_ACLKR_ENABLE | savePinMux);
savePinMux = HWREG(SOC_SYSCFG_0_REGS + SYSCFG0_PINMUX(1)) & \
~(SYSCFG_PINMUX1_PINMUX1_19_16 | \
SYSCFG_PINMUX1_PINMUX1_15_12 | \
SYSCFG_PINMUX1_PINMUX1_11_8 | \
SYSCFG_PINMUX1_PINMUX1_7_4 | \
SYSCFG_PINMUX1_PINMUX1_23_20 | \
SYSCFG_PINMUX1_PINMUX1_27_24 | \
SYSCFG_PINMUX1_PINMUX1_31_28
);
HWREG(SOC_SYSCFG_0_REGS + SYSCFG0_PINMUX(1)) = \
(PINMUX1_MCASP0_AXR11_ENABLE | \
PINMUX1_MCASP0_AXR12_ENABLE | \
PINMUX1_MCASP0_AXR13_ENABLE | \
PINMUX1_MCASP0_AXR14_ENABLE | \
PINMUX1_MCASP0_AXR8_ENABLE | \
PINMUX1_MCASP0_AXR9_ENABLE | \
PINMUX1_MCASP0_AXR10_ENABLE | \
savePinMux);
}
1.McASPI2SConfigure(); McASP的配置程序如下：
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, 6, 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_NON_DMA);
McASPTxFmtI2SSet(SOC_MCASP_0_CTRL_REGS, WORD_SIZE, SLOT_SIZE,
MCASP_TX_MODE_NON_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_FALL_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_INTERNAL, 16u, 16u);
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 */
// HWREG(0x01D000A0) = (0x00001F00);
// McASPTxClkCfg(SOC_MCASP_0_CTRL_REGS, MCASP_TX_CLK_INTERNAL, 16u, 16u);
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);
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, 13u);
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, 14u);
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, 8u);
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, 10u);
McASPSerializerRxSet(SOC_MCASP_0_CTRL_REGS, 11u);
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)
| MCASP_PIN_AMUTE
);
McASPPinDirInputSet(SOC_MCASP_0_CTRL_REGS,
MCASP_PIN_AFSX
| MCASP_PIN_AFSR
| MCASP_PIN_AHCLKX
| MCASP_PIN_AHCLKR
| MCASP_PIN_ACLKX
| MCASP_PIN_ACLKR
| MCASP_PIN_AXR(MCASP_XSER_RX)
| MCASP_PIN_AXR(1u<<(13u))
| MCASP_PIN_AXR(1u<<(14u))
| MCASP_PIN_AXR(1u<<(8u))
| MCASP_PIN_AXR(1u<<(10u))
| MCASP_PIN_AXR(1u<<(11u))
);
/* Enable error interrupts for McASP */
McASPTxIntEnable(SOC_MCASP_0_CTRL_REGS,
MCASP_TX_DATAREADY
| MCASP_TX_CLKFAIL
| MCASP_TX_SYNCERROR
| MCASP_TX_UNDERRUN);
McASPRxIntEnable(SOC_MCASP_0_CTRL_REGS,
MCASP_RX_DATAREADY
| MCASP_RX_CLKFAIL
| MCASP_RX_SYNCERROR
| MCASP_RX_OVERRUN);
//MCASP_RX_DMAERROR MCASP_TX_DMAERROR
}
2.运行完上述配置后激活发送接受I2SDataTxRxActivate(); 遇到这个问题：程序无法跳出红色部分的语句
static void I2SDataTxRxActivate(void)
{
/* Start the clocks */
McASPRxClkStart(SOC_MCASP_0_CTRL_REGS, MCASP_RX_CLK_EXTERNAL);
McASPTxClkStart(SOC_MCASP_0_CTRL_REGS, MCASP_TX_CLK_EXTERNAL);
/* Enable EDMA for the transfer */
// EDMA3EnableTransfer(SOC_EDMA30CC_0_REGS, EDMA3_CHA_MCASP0_RX,
// EDMA3_TRIG_MODE_EVENT);
// EDMA3EnableTransfer(SOC_EDMA30CC_0_REGS,
// EDMA3_CHA_MCASP0_TX, EDMA3_TRIG_MODE_EVENT);
/* Activate the serializers */
McASPRxSerActivate(SOC_MCASP_0_CTRL_REGS); McASPTxSerActivate(SOC_MCASP_0_CTRL_REGS); /* make sure that the XDATA bit is cleared to zero */
while(McASPTxStatusGet(SOC_MCASP_0_CTRL_REGS) & MCASP_TX_STAT_DATAREADY);
/* Activate the state machines */
McASPRxEnable(SOC_MCASP_0_CTRL_REGS);
McASPTxEnable(SOC_MCASP_0_CTRL_REGS);
McASPTxBufWrite(SOC_MCASP_0_CTRL_REGS, MCASP_XSER_TX, 0);
}
