IWR6843ISK: EDMA各类型是否会从触发pingpong传输的问题

你好，

从下面的代码里，我看到在68xx_Sense_and_Direct_HVAC_Control这个的demo获取adc buffer的edma是调用函数来触发的。关于其他几个edma的API，我建议你通过代码来了解他们是如何使用的。另，建议下次提问题的时候说明一下你看的代码的出处。

68xx_Sense_and_Direct_HVAC_Control\src\dss\dss_data_path.c

...

void MmwDemo_processChirp(MmwDemo_DSS_DataPathObj *obj)
{
uint32_t antIndx, baseIdx;
volatile uint32_t startTime;

if(obj->chirpCount > 1) //verify if ping(or pong) buffer is free for odd(or even) chirps
{
MmwDemo_dataPathWait1DOutputData (obj, pingPongId(obj->chirpCount));
}

/* Kick off DMA to fetch data from ADC buffer for first channel */
EDMA_startDmaTransfer(obj->edmaHandle[EDMA_INSTANCE_A],
MMW_EDMA_CH_1D_IN_PING);

obj->rxAntennaCount = 0;
baseIdx = obj->txAntennaCount * obj->numPhyRxAntennas * obj->numChirpsPerFrame;

/* 1d fft for first antenna, followed by kicking off the DMA of fft output */
for (antIndx = 0; antIndx < obj->numPhyRxAntennas; antIndx++)
{
/* kick off DMA to fetch data for next antenna */
if (antIndx < (obj->numPhyRxAntennas - 1))
{
if (isPong(antIndx))
{
EDMA_startDmaTransfer(obj->edmaHandle[EDMA_INSTANCE_A],
MMW_EDMA_CH_1D_IN_PING);
}
else
{
EDMA_startDmaTransfer(obj->edmaHandle[EDMA_INSTANCE_A],
MMW_EDMA_CH_1D_IN_PONG);
}
}

...