Comments | dave_t_lurker: Poking and prodding USB

dave_t_lurker

Poking and prodding USB

Jun 29, 2008 18:43

I bought a cheapish GPS waypoint logger thing yesterday. £25 from Maplins. It is tiny, sports one button and two LEDs. The internal battery is supposed to be good for 40 hours logging ( Read more... )

Comments 6

geekette8 June 29 2008, 19:32:58 UTC

Portmon will tell you what your PC is sending to the serial port, won't it? Or is its own driver not treating it as a serial port despite Windows having enumerated it as such?

dave_t_lurker June 29 2008, 20:34:38 UTC

Cheers. I was having a total brainfart and forgetting portmon, the device is behaving as a comport by the time I get to use it (still working on linux/mac libUSB init code for it) so portmon does the trick nicely.

I think I've found the waypoint command and the correct response code.

geekette8 June 30 2008, 09:00:20 UTC

Great! I've been fighting with USB drivers in assorted guises over the last week and Portmon has been indispensible, which is why it sprang to mind!

(The comment has been removed)

dave_t_lurker June 30 2008, 07:50:06 UTC

No problem, a second brain looking over the problem is always useful. Anything I work out is probaby going to end up here : http://webshed.org/wiki/I-gotU-GT100
and I'll probably mention it on LJ too.

gerald_duck June 30 2008, 01:44:03 UTC

If you get completely stuck, stick the thing in an envelope and we can try it out with our hardware USB monitor up here. Though it sounds like you now have at least some traction on the problem?

We can't fare any worse with your waypoint logger than with our own product.

dave_t_lurker June 30 2008, 07:47:35 UTC

I might take you up on that if I have no joy with the libusb / usbserial stuff.