USB serial cable issue

[Milosch Meriac]

Dear Martin,

martin at garben.net wrote:
> I just bought the RS232 serial cable.
> The Reader works fine with reading and writing, but when I plug the serial cable to the reader, my system cannot detect the reader anymore.
> E.g.:
> OPCD_TEST throws the error in opcd_usb.c right here:
> if (ausb_claim_interface(oh->hdl, 0) < 0) {
> 		fprintf(stderr, "Unable to claim usb interface "
> 			"1 of device: %s\n", usb_strerror());
> 		exit(1);
> 
> Or mifare-tool shows that no reader is found.
> I guess that there is an issue with the USB support and my linux?!

Nope -I worek with Linux all the time. Could it be that you accidentally
   plugged the cable the wrong way? The black cable side is supposed to
be pin 1 (where the triangle is on the PCB).

You can easily test this by not plugging the USB serial debug cable into
OpenPCD at all - it's powered anyway over USB. It's supposed to be detected.

Also please verify if the red cable is removed from the connector - if
not just cut it away (3V3 output from the USB debug cable). Normally it
won't do harm , but we remove it usually from all connectors.

> Has anyone encountered such an issue before?

Not to my knowledge. Please keep me up to date with your progress.

Milosch
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