fx3 DmaMultiChannel Manual_Many_to_one总是在dma回调中挂起

嗨，那里
我使用FX3 GPIF II连接到FPGA获取数据。我设计了GPIF状态机，并使用自动多对一模式进行测试，并且工作正常。然后我跟随AN75 79图像传感器样本，切换到手动多对一DMA通道，因为我们需要添加一些头信息或插入一些数据包。然而，我被困了几天，努力让它发挥作用。DMA回调被调用，但是如果我调用任何CYU3PDMALUtiON CHANNETGETBuffor或COMPUSTBASE/DCARSORACK，我的整个程序被卡住，我的主线程的输出也会停止。我觉得它好像崩溃了。如果我使用OpenOCD调试，我看不到什么是错误。
有人对什么可能导致问题或如何调试这种情况有什么建议？
谢谢
乔



     以下为原文
  Hi, There

I'm using fx3 gpif II connect to fpga to get data. I've designed gpif state machine and tested using auto many to one mode and it works. I then followed the AN75779 image sensor sample and switched to manual many to one dma channel because we need to add some header information or insert some packet. However I've been stuck for a couple of days struggling to make it work. The dma callback is called but if I make any calls like CyU3PDmaMultiChannelGetBuffer or CommitBuffer/DiscarBuffer my whole program stuck, the output from my main thread also stops. It seems to me it somehow crashed. If I debug using openOCD I cannot see what are the errors.
Does anybody has any suggestions on what might cause the problem or how to debug this situation?

thanks
Joe