USB superspeed peripherals Forum Discussions

Dear Sir，

I know FX3/CX3 code can be download into internal RAM by control center tools and then re-enumerate again.

So, I also want to use this method in my  application code. My application code find USB bootloader and then download CX3 firmware image into its internal RAM,just like what USB control center do. My app code will do two functionalities, one is USB CONTROL CENTER downloader, the other is a real application ,e.g. UVC host application.

Can you give me some advice for this case?

Best,

David

Dear Sir,

I see the schematics of CX3 RDK, all DNU pins are connected with test pads， it is necessary to do that? or they can be float without any test pads connected?

Best,

David

Hi all,

I'd like to know how to proceed to manage multiple configurations to have self/bus powered profiles.

I already modified the USB descriptors in order to have 2 configuration but is seems that CyU3PUsbSetDesc function only register the last one (as its description cryptically suggest...).

If the hw need to change configuration (eg. the external power is missing), do I have to use CyU3PConnectState to disable USB connection, register the new configuration with CyU3PUsbSetDesc, and enable USB connection again? (Re-enumeration)

In this case, should the USB descriptors explicitly declare 2 different configuration descriptor (Number of configurations = 2 into Standard Device Descriptor) ?

Thanks

The FX3 cannot re-enumerate after download UVC firmware program from AN75779.zip.And I use 1.3.3 version of FX3 SDK .The SDK provide UVC example program also cannot re-enumerate after download UVC firmware program ,but other eaxmple program such as slavefifo can re-enumerate successfully.I do not know whether it's related to inf files.The control center can enumerate The FX3 bootloader device mode. 

Hello everyone

 I am using slavefifo 2bit firmware. The PC program I use streamer.Now I want transfer data from FPGA through FX3 to PC. But I meet a problem .

When I write data to FX3 ceaselessly. Streamer will get no failures. But if I write data to FX3 everytime delay 40us for other device control, I will get a lot of failures at Streamer.

When I usb FX2, the same FPGA program will not get this kind of problem. What's wrong with my design. Is the waitforxfer() function using for speed synchronizing between the PC and the FPGA?