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TMS320C5535 eZdsp USB Kit cannot run in USB 2.0

Long Ngoc
Intellectual 295 points
Other Parts Discussed in Thread: TMS320C5535

Hi TI engineers & friends,

I have the board TMS320C5535 eZdsp USB kit come with default Connected Audio Framework installed in the memory stick, when I plug the board into my computer, it throws out a message "This device can perform faster if it was connected to a high speed USB 2.0". However I am sure that all the ports in my computer are USB 2.0, I also tried on another computers as well but no luck at all. This made it a big problem for me since I have another application that need to operate in Hi-speed mode but I cannot manage to do it.

Does anyone have any idea on this?

Thank you very much!

  • 0
    Intellectual 295 points

    After commenting out the line USB_setFullSpeedMode() it works properly in Highspeed mode. BTW, I found this article http://e2e.ti.com/support/dsp/tms320c5000_power-efficient_dsps/f/110/t/163511.aspx and wonder if it is a remaining bug and need to fix as suggested by Bruno:

    "both flags should be set at once, as in:
    usbRegisters->PERI_CSR0_INDX |= (CSL_USB_PERI_CSR0_INDX_SERV_RXPKTRDY_MASK | CSL_USB_PERI_CSR0_INDX_DATAEND_MASK); "

    In the article, Steve also suggested to replace USB_setFullSpeedMode to USB_setHighSpeedMode but it seems this function does not exist, so I guess just remove USB_setFullSpeedMode and the device will try to negotiate High-speed mode by default for USB 2.0.