Ron Gage wrote:
> Alan Stern wrote:
>
>> Umm. I'm not familiar with USB programming under Windows, so I can't
>> say what (if anything) the "Function: 0019" means. It's probably
>> something specific to the Windows USB API and not meaningful in other
>> operating systems.
>>
>>
>>
> 4 in down n/a 2.925 VENDOR_ENDPOINT -
> URB Header (length: 80)
> SequenceNumber: 4
> Function: 0019 (VENDOR_ENDPOINT)
> Entirely possible. I'll look into this further.
>
>
The function number (0019 - Vendor Endpoint) appears to be relevant: I
am trying to send a control message to the device and am getting back
error -32 (EPIPE). I'm using libusb for the comms right now. Here is
the snip from my code:
handle = usb_open(dev);
if (!handle)
{
printf ("Could not open device.\n");
}
else
{
char buff[128];
printf ("Set Configuration returned
%d\n",usb_set_configuration(handle, 1));
printf ("Claim Interface returned %d\n",usb_claim_interface
(handle, 0));
while (1)
{
int r1,r2,x;
char b1[4096],b2[4096];
r1 = usb_control_msg(handle, 0,0x81,0x80,0, b1, 128,10000);
r2 = usb_control_msg(handle, 0,0x81,0x80,0, b2, 128,10000);
Set Configuration and Claim Interface are both returning 0 here, r1 and
r2 are both being set to -32.
>>> PipeHandle: 00000000
>>>
>>> SetupPacket:
>>> 0000: 00 81 80 00 00 00 00 00
>>>
>>>
Ron Gage
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