On Saturday 18 March 2006 16:52, Chaskiel Grundman wrote:
> > send: 00 a4 00 0c 02 3f 00
> > recv: a4
>
> This means that the set_protocol patch is incorrect. the a4 is a proper
> T=0 ack byte. (and my assumptions about what usb T=0 devices do don't
> apply here)
>
> You didn't say what actually happens when eutron_send only gets/sends 5
> bytes. Does the card reply at all in that case?
send: 00 a4 00 0c 02
recv: a4
This results in an immediate error after reading the a4, and I see why.
eutron_recv has this code in the loop:
if(rbs == 0)
goto failed;
rbs probably means "remaining bytes" ?
Since in this case it is for a read of len=1, all the desired data is read,
and this is considered an error. I changed the "goto failed" into a "break"
and now we get farther:
send: 3f 00
After sending these next two bytes, openct tries to read len=1. The first
attempt returns no data. The second attempt returns -5 (ioctl error), and
that's the end.
-Justin
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