Replies to This Discussion

Permalink Reply by Thomas J Coyle III on July 5, 2009 at 3:59pm

Hi all,

I think that I might have discovered why I, like many others, could not perform the I/O upload with the GPS connected.

Since I had exhausted all of the usual electrical design issues without any success, I decided to tackle this issue from a S/W point of view. I had been using FTDI drivers that I had downloaded from the Parallax website over two years ago. Well alot can change in a few years especially with S/W. So I went back to the Parallax website and downloaded the latest FTDI drivers (2.04.16). After installation, I was able to I/O upload Ardupilot 2.2.3 with the GPS connected using the Adafruit FTDI cable.

Therefore, I suggest that for everyone having the I/O upload problem with the GPS connected, try updating the FTDI drivers on your PC as it might resolve this issue for you.

Regards,
TCIII

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Permalink Reply by Matt on July 5, 2009 at 4:38pm

Thanks TCIII, I will try this tonight and report back. Are you using Arduino 15 or 16?

@Jordi, can you confirm what drivers you are using?

Regards,
Matt

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Permalink Reply by Thomas J Coyle III on July 5, 2009 at 4:44pm

Hi Matt,

I am using Arduino IDE 16.

Good luck, hope it works for you.

Also, I noticed one instance where the I/O upload did not appear to start as the red power light did not go off, however I did not get a failed to upload message after a minute, so I hit the Arudpilot reset switch and the I/O upload proceeded to complete with the red power light going off then on once I got the IDE upload complete message.

Regards,
TCIII

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Permalink Reply by Chris Anderson on July 5, 2009 at 4:53pm

Tom, that's a good suggestion. We're always using the latest drivers, and had assumed everyone else was, too. But may that wasn't the case. I've updated the FTDI debugging tips to include this.

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