USB Superspeed Peripherals

[Anonymous]

Hi,

     I am using GPIF to transfer data to USB.

     Now if i config the dma channel as auto mode, the channel work well. But when i config the dma channel as manual mode, add the prob notification and callback. I cant see the callback has been called.

     The size of dma is 15KB and the count is 8 .

     Anyone can give me some ideas the reason?

Thanks a lot!

[abhinavg_21]

Hi,

Which firmware example you are referring? Please note that you have to register DmaCallback in DMA channel config. You can refer to C:\Users\abga\workspace\UartLpDmaMode firmware example.

Thanks & regards

Abhinav

[Anonymous]

Hi, abga

     I am referring USBBulkLoopManual, and I just modify the dmaCfg as:

dmaCfg.notification=CY_U3P_DMA_CB_PROD_EVENT;

dmaCfg.cb = mycallback;

and modify the CY_U3P_DMA_TYPE_AUTO into CY_U3P_DMA_TYPE_MANUAL.

then I  add my mycallback function that print debug message at first step.

Are there any other steps to registe the callback?

[Anonymous · Accepted solution]

I have solved this problem.
The reason is that I only load the GPIF configuration, but did not initialize the PIB configuration.

But I still don't know why I can work without initializing the PIB in Auto mode, that confuses my judgment.