上一期我们用MATLAB对加窗后的距离维数据进行了FFT处理看到了目标和目标距离，这一期我们看看C代码是如何做FFT的，回顾一下1D处理的函数代码：

void MmwDemo_interChirpProcessing(MmwDemo_DSS_DataPathObj *obj, uint8_t chirpPingPongId)
{
    uint32_t antIndx, waitingTime;
    volatile uint32_t startTime;
    volatile uint32_t startTime1;
    MmwDemo_DSS_dataPathContext_t *context = obj->context;
 
    waitingTime = 0;
    startTime = Cycleprofiler_getTimeStamp();
 
    
    EDMA_startDmaTransfer(context->edmaHandle[MMW_DATA_PATH_EDMA_INSTANCE],
                       MMW_EDMA_CH_1D_IN_PING);
 
    
    for (antIndx = 0; antIndx < obj->numRxAntennas; antIndx++)
    {
        /* ki