Objective Development Forums 2012-05-10T17:46:06+02:00 https://forums.obdev.at/app.php/feed/topic/6637 2012-05-10T17:46:06+02:00 2012-05-10T17:46:06+02:00 https://forums.obdev.at/viewtopic.php?t=6637&p=21569#p21569 <![CDATA[CDC and transfer-sizes]]>
I'm having a question concerning vusb, CDC and the size of bulk-transfers.

Is it possible to have bigger Bulk-sizes instead of only 7 or 8 bytes? It seems like
usbFunctionWriteOut( uchar *data, uchar len ) is called with a max length of 7.

I also tried to increase HW_CDC_BULK_OUT_SIZE to for example 64 but it seems like that doesn't change anything.

I'm currently trying to build a RF-USB device where I'd like to send packets with different lengths via the CDC interface. The maximal length will be about 32bytes so it'd be great to have bigger sizes.


Thanks for any help.

Regards,
Alex

Statistics: Posted by Guest — Thu May 10, 2012 5:46 pm

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