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USB Receive Problem

Question asked by Georg Schmidt on Dec 2, 2013
Latest reply on Dec 13, 2013 by Kan_Li

Hi,

 

I'm using the USBOTG-Module of the Kinetis MK60FN1M0VLQ12 in Device Mode.

By now I only got single-byte-packets from the host and everything worked fine, even if I transfered packets with several bytes to the host.

Now I tried to transfer several bytes in one packet from the host to the device and it failed.

After some debugging I found out, that the transmitted data is stored completely in the appropriate Buffer, but the Cnt-field (BC) in the BDT-Stat-Register will not be updated - I allways get a '1' when I read it.

So I only get the first byte of the transfered data.

 

Can you give me some hints what could be the reason that the USB-FS does not update the byte count?

 

Regards,

Georg

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