i started with classic programmer not responding problems, then i found loop back test -- and it's not passing, then i tried programming the arduino from couple of another computers and both of them went ok (Ubuntu and Mac OS X 10.6.x)
SO it's my particular Mac OS X 10.5.8 system - something is wrong with CDC driver - the arduino gets recognized, /dev/tty.usbmodemXX is being created, but when i write to it, it's not working - no TX RX leds flashing, no loopback, nothing.
SO i'm asking all the other mac users in this forum for a HELP - how do i debug CDC on my system? where do i start? to what forums do i write? what keywords do i put to google?
this might be of help to lots of frustrated mac users posting to this forum, cursing arduino
i'm a fulltime programmer and can handle complicated stuff.. please post all your insights
Thank you SO MUCH for this aproach!!! I finally made my Arduino UNO work on a Macbook with OSX 10.5.8 after being lost days in the forums and in google and having find nothing. I did exactly what you did and ... voila!
Hi, i don't know what i have done however, i was mucking around with a couple of different arduinos Uno, leonardo etc, i had two on the go swapping out bits as i got them sorted on one etc...
anyway, I made a mod to a bit of code, and this would not upload, it had the error
ioctl("TIOCMGET"): Inappropriate ioctl for device
as best as I can tell this is a serial port failure of some kind?
I tried a different arduino, same result.
I tried a "new" sketch and still no connect...
I tried the loopback test on both the leonardo and the uno. both failed with a warning
could not open device, device not figured etc.
finally before closing "screen", screen advises me that it could not find a PTY