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USB Superspeed Peripherals

JaVa_2104626
New Contributor

Hi,

     I continued to discuss the issue about USB1.1,last time  maybe I gave inadequary message about this issue.

     Firstly,I introduce my using scene, I choose the fx3 firmware,which is wanted to use the usb peripheral mode,the usb worked in full speed mode.

According to the USB2.0 or USB1.1 protocol,In full speed mode ,the packesize can be set 8,16,32,64bytes,we can set wMaxPacketSize in the device descriptor.

     Now I met the issue ,I set wMaxPacketSize is 8bytes,the usb can't be found,only set wMaxPacketSize is 64bytes,the usb can run.

I want to know if the wMaxPacketSize can be set 8bytes in full speed,and the relationship betweenthe bcdUSB and wMaxPacketSize in the device descriptor

     Please give me some support or example,guys.

Thanks

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3 Replies
Anonymous
Not applicable

Hi,

In addition to changing the packet size in the device descriptor and the host application, did you also change the size in the endpoint configuration API?

If not, can you please try it?

Regards,

-Madhu Sudhan            

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Peng
New Contributor

how to control cyusb3014 into usb1.1 mode?

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Peng
New Contributor

how to control control cyusb3014 in usb1.1 mode?

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