USB superspeed peripherals Forum Discussions

CyU3PDmaChannelSetupSendBuffer这个函数在使用debug的时候出现了67的错误，请问这是什么原因导致的呢？并且，我想询问一下，在任何USB设备下，假如某一个端点设置成INT模式，主机是否会轮询这个端点，从而每当此端点有数据的时候，在主机的轮询下就会发送给主机？？我需要完成这个功能，但是我的代码配不出这种效果，请大家帮助我。谢谢

Dear Support Members

I defined mutichannel dma for stream as below (DMA Size is 16KB...as i think...)

======

#define STREAM_DMA_BUFFERS         6
#define STREAM_DATA_BUF_SIZE      0x3FF0
#define STREAM_PACKET_HEADER_SIZE    16
#define STREAM_PACKET_FOOTER_SIZE    0

Unit has been in production for 6 years. Device will be listed in the Device Manager with Intel(R) 3.0 eXtensible Host controller. But has sporadic link training with Intel(R) 3.1 eXtensible Host controller or 3.2.

After trying to debug some of the available C++ examples like BulkLpAutoCpp, i've found out that any C++ based project will not properly debug under openocd and will halt instead. C projects debug just fine and i've already established that my debugger config is exactly the same as in the docs.

So i would like to ask how could i debug my C++ projects using openOCD on boards like the FX3 SuperSpeed explorer? Going back to pure C projects isn't really an option and debugging only through uart is insufficient (especially to check register values after an issue).

Having the FPGA connected the FX3. And the data transaction happened between the FPGA and Host-app  using the bulk endpoints through Auto- DMA channels .

For this  I am using the

  1 )
xferdata(buffer , length )  for register read/write
2)
for bulk transfer 
xferdata( )  having 4 arguments like  XferData(PUCHAR buf, LONG &bufLen, CCyIsoPktInfo* pktInfos, bool pktMode);

1 )   how to debug this issue ??
And also find the api  XferData () with 2, 3 and 4 arguments

having  2 arguments and also with 4 arguments 

USBDevice->BulkOutEndPt->XferData(buf, length);   

bool XferData(PUCHAR buf, LONG &len, CCyIsoPktInfo* pktInfos = NULL);
bool XferData(PUCHAR buf, LONG &bufLen, CCyIsoPktInfo* pktInfos, bool pktMode);
2 ) So whats the difference between them ?? 

I read the multiple threads but  not able to understand the USB interface working and how to debug 
https://community.infineon.com/t5/Knowledge-Base-Articles/FX3-FX2LP-XferData-API-Usage-KBA226200/ta-p/258921
Solved: How to handle CY_U3P_USB_SC_SET_FEATURE and CY_U3P... - Infineon Developer Community

Please help me in understanding the USB interface and in how to Debug .