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Re: [Fwd: Re: [Paparazzi-devel] USB converter problem...]

From: Alexis Lussier Desbiens
Subject: Re: [Fwd: Re: [Paparazzi-devel] USB converter problem...]
Date: Sun, 2 Sep 2007 15:25:11 -0700

Ok guys, I found the problem thanks to the help of a few peoples on the forum. It wasn't a permission problem as Ubuntu Feisty already has the right permission set!

The problem was that brltty (a braille reader installed in ubuntu Feisty) was interfering with the FDTI USB-RS232-3V3 converter... By looking at dmesg I was getting a few lines like:

usb 1-2: usbfs: process 3719 (brltty) did not claim interface 0 before use

So just type :

"sudo apt-get remove brltty" and reboot... now I got the download of the bootloader working!! SWEET!!!

As long as you don't rely on a USB-Braille machine it should work! :-)


On 9/2/07, Matthew Currie < address@hidden> wrote:

-------- Original Message --------
Subject: Re: [Paparazzi-devel] USB converter problem...
Date: Sun, 02 Sep 2007 23:34:22 +0200
From: Pascal Brisset <address@hidden>
Reply-To: address@hidden
To: address@hidden
References: <address@hidden>


on which port do you plug your cable ?
- If it is a standard serial port, it's probably /dev/ttyS0 (or S1)
- If you use a USB converter, it's probably /dev/ttyUSB0 (you can see
it in /var/log/syslog while you plug the converter)

The port is written in the load command in the Makefile, line 124.
Change it if needed.

You also need some permissions: You have to be part of the 'dialout' group.
The "groups" command will give you the list of groups you are member:

address@hidden % groups
pascal adm dialout cdrom floppy audio dip video plugdev scanner netdev
lpadmin powerdev admin

If you are not member of dialout, add it using the graphical interface
(Administration -> Users)
or simply with the command

sudo adduser <your login> dialout

It will be effective only on your next login or after the command

newgrp dialout

Hope it helps


Alexis Lussier Desbiens wrote:
> Hi,
> I am just done soldering all the part on a Classix paparazzi board. I
> powered it with 5V, connected P0.14 to ground and RX from the AP chip
> to TX of the computer and Tx from the AP chip to Rx from the computer
> (with the TTL-232R-3V3 cable). I reset the board and then I download
> the USB bootloader with "make upload_bl PROC=GENERIC" and I get this
> error:
> Can't open COM-Port /dev/ttyUSB0
> The only way I can get around is by plugging the USB cable just after
> I type the make command and then I get a few :
> ioctl get ok, status = 6
> ioctl get ok, status = 6
> ioctl get ok, status = 6
> ioctl get ok, status = 4
> ioctl get ok, status = 4
> ioctl get ok, status = 0
> ioctl get ok, status = 0
> Synchronizing.ioctl get ok, status = 0
> but it always end up with:
> ioctl get failed
> Any idea of what I am doing wrong? Should I program the FBW chip
> first? It seems that the problem is in the USB converter...
> Thanks for your help, I am anxious to try flying something with this board! :-)
> Alexis
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden

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