你现在是跑下面这段main出问题吗？我看你代码里两个main：
int main(void)
{
sai_transfer_t xfer, send_xfer;
edma_config_t dmaConfig = {0};
sai_transceiver_t saiConfig;
BOARD_ConfigMPU();
BOARD_InitBootPins();
BOARD_InitBootClocks();
CLOCK_InitAudioPll(&audioPllConfig);
BOARD_InitDebugConsole();
/*Clock setting for LPI2C*/
CLOCK_SetMux(kCLOCK_Lpi2cMux, DEMO_LPI2C_CLOCK_SOURCE_SELECT);
CLOCK_SetDiv(kCLOCK_Lpi2cDiv, DEMO_LPI2C_CLOCK_SOURCE_DIVIDER);
/*Clock setting for SAI1*/
CLOCK_SetMux(kCLOCK_Sai1Mux, DEMO_SAI1_CLOCK_SOURCE_SELECT);
CLOCK_SetDiv(kCLOCK_Sai1PreDiv, DEMO_SAI1_CLOCK_SOURCE_PRE_DIVIDER);
CLOCK_SetDiv(kCLOCK_Sai1Div, DEMO_SAI1_CLOCK_SOURCE_DIVIDER);
/*Enable MCLK clock*/
BOARD_EnableSaiMclkOutput(true);
/* Init DMAMUX */
DMAMUX_Init(DEMO_DMAMUX);
DMAMUX_SetSource(DEMO_DMAMUX, DEMO_TX_EDMA_CHANNEL, (uint8_t)DEMO_SAI_TX_SOURCE);
DMAMUX_EnableChannel(DEMO_DMAMUX, DEMO_TX_EDMA_CHANNEL);
DMAMUX_SetSource(DEMO_DMAMUX, DEMO_RX_EDMA_CHANNEL, (uint8_t)DEMO_SAI_RX_SOURCE);
DMAMUX_EnableChannel(DEMO_DMAMUX, DEMO_RX_EDMA_CHANNEL);
PRINTF("SAI example started!\n\r");
/* Init DMA and create handle for DMA */
EDMA_GetDefaultConfig(&dmaConfig);
EDMA_Init(DEMO_DMA, &dmaConfig);
EDMA_CreateHandle(&dmaTxHandle, DEMO_DMA, DEMO_TX_EDMA_CHANNEL);
EDMA_CreateHandle(&dmaRxHandle, DEMO_DMA, DEMO_RX_EDMA_CHANNEL);
#if defined(FSL_FEATURE_EDMA_HAS_CHANNEL_MUX) && FSL_FEATURE_EDMA_HAS_CHANNEL_MUX
EDMA_SetChannelMux(DEMO_DMA, DEMO_TX_EDMA_CHANNEL, DEMO_SAI_TX_EDMA_CHANNEL);
EDMA_SetChannelMux(DEMO_DMA, DEMO_RX_EDMA_CHANNEL, DEMO_SAI_RX_EDMA_CHANNEL);
#endif
/* SAI init */
SAI_Init(DEMO_SAI);
SAI_TransferTxCreateHandleEDMA(DEMO_SAI, &txHandle, tx_callback, NULL, &dmaTxHandle);
SAI_TransferRxCreateHandleEDMA(DEMO_SAI, &rxHandle, rx_callback, NULL, &dmaRxHandle);
/* I2S mode configurations */
//SAI_GetClassicI2SConfig(&saiConfig, DEMO_AUDIO_BIT_WIDTH, kSAI_Stereo, 1U << DEMO_SAI_CHANNEL);
SAI_GetTDMConfig(&saiConfig, kSAI_FrameSyncLenOneBitClk, DEMO_AUDIO_BIT_WIDTH, DEMO_AUDIO_DATA_CHANNEL, 1U << DEMO_SAI_CHANNEL);
saiConfig.frameSync.frameSyncEarly = true;
saiConfig.syncMode = DEMO_SAI_TX_SYNC_MODE;
//saiConfig.bitClock.bclkPolarity = DEMO_SAI_TX_BIT_CLOCK_POLARITY;
//saiConfig.masterSlave = DEMO_SAI_MASTER_SLAVE;
SAI_TransferTxSetConfigEDMA(DEMO_SAI, &txHandle, &saiConfig);
saiConfig.syncMode = DEMO_SAI_RX_SYNC_MODE;
SAI_TransferRxSetConfigEDMA(DEMO_SAI, &rxHandle, &saiConfig);
/* set bit clock divider */
SAI_TxSetBitClockRate(DEMO_SAI, DEMO_AUDIO_MASTER_CLOCK, DEMO_AUDIO_SAMPLE_RATE, DEMO_AUDIO_BIT_WIDTH,
DEMO_AUDIO_DATA_CHANNEL);
SAI_RxSetBitClockRate(DEMO_SAI, DEMO_AUDIO_MASTER_CLOCK, DEMO_AUDIO_SAMPLE_RATE, DEMO_AUDIO_BIT_WIDTH,
DEMO_AUDIO_DATA_CHANNEL);
/* master clock configurations */
BOARD_MASTER_CLOCK_CONFIG();
/* Use default setting to init codec */
if (CODEC_Init(&codecHandle, &boardCodecConfig) != kStatus_Success)
{
assert(false);
}
if (CODEC_SetVolume(&codecHandle, kCODEC_PlayChannelHeadphoneLeft | kCODEC_PlayChannelHeadphoneRight,
DEMO_CODEC_VOLUME) != kStatus_Success)
{
assert(false);
}
int pTemp[BUFFER_SIZE/sizeof(int)] = {0};
int pMic[BUFFER_SIZE/sizeof(int)] = {0};
int pSendXfer[BUFFER_SIZE/sizeof(int)] = {0};
send_xfer.data = pSendXfer;
send_xfer.dataSize = BUFFER_SIZE;
while (1)
{
if (rx_callback_finished)
{
rx_callback_finished = false;
//PRINTF("emptyBlock1=%d\r\n",emptyBlock);
xfer.data = Buffer + rx_index * BUFFER_SIZE;
xfer.dataSize = BUFFER_SIZE;
if (kStatus_Success == SAI_TransferReceiveEDMA(DEMO_SAI, &rxHandle, &xfer))
{
rx_index++;
}
if (rx_index == BUFFER_NUMBER)
{
rx_index = 0U;
}
}
if (tx_callback_finished)
{
tx_callback_finished = false;
xfer.data = Buffer + tx_index * BUFFER_SIZE;
xfer.dataSize = BUFFER_SIZE;
#if 1
memcpy(pTemp, xfer.data, BUFFER_SIZE);
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
pMic[j*SIGLE_SAMPLE + i] = pTemp[DEMO_AUDIO_DATA_CHANNEL*i+j];
}
}
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
//pMic[j*SIGLE_SAMPLE + i] = pMic[j*SIGLE_SAMPLE + i]<<1;//(1) Shift one bit to the right
//pMic[j*64 + i] = pMic[j*64 + i]<<1;//(2) Shift one bit to the left
//pMic[j*64 + i] = pMic[j*64 + i];
}
}
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
pTemp[DEMO_AUDIO_DATA_CHANNEL*i+j] = pMic[j*SIGLE_SAMPLE + i];
}
}
memcpy(send_xfer.data, (void *)pTemp, BUFFER_SIZE);
#endif
if (kStatus_Success == SAI_TransferSendEDMA(DEMO_SAI, &txHandle, &send_xfer))
{
tx_index++;
}
if (tx_index == BUFFER_NUMBER)
{
tx_index = 0U;
}
}
}
}
最关键是这个代码加了出问题吗？
#if 1
memcpy(pTemp, xfer.data, BUFFER_SIZE);
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
pMic[j*SIGLE_SAMPLE + i] = pTemp[DEMO_AUDIO_DATA_CHANNEL*i+j];
}
}
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
//pMic[j*SIGLE_SAMPLE + i] = pMic[j*SIGLE_SAMPLE + i]<<1;//(1) Shift one bit to the right
//pMic[j*64 + i] = pMic[j*64 + i]<<1;//(2) Shift one bit to the left
//pMic[j*64 + i] = pMic[j*64 + i];
}
}
for(int i=0; i<SIGLE_SAMPLE; i++)
{
for(int j=0; j<DEMO_AUDIO_DATA_CHANNEL; j++)
{
pTemp[DEMO_AUDIO_DATA_CHANNEL*i+j] = pMic[j*SIGLE_SAMPLE + i];
}
}
memcpy(send_xfer.data, (void *)pTemp, BUFFER_SIZE);
#endif
如果不处理，就可以正常，对吗？
我这边的MIMXRT1020-EVK 板子的codec出了问题，这也是为什么跑你代码进入assert，我要再找个板子测下。
看你的问题情况，应该还是和软件代码的处理有关，因为我们这边有处理8通道的SAI数据都能正常。
你现在的数据处理是想实现什么功能？音频数据变换之后，看上去已经改变了，如何保证播放的数据和采集数据的一致？
Best Regards,
Kerry
