paparazzi-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] Umarim Lite v2: no contact, no flashing


From: S. Spies
Subject: Re: [Paparazzi-devel] Umarim Lite v2: no contact, no flashing
Date: Sat, 09 Feb 2013 12:21:19 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2

Hi again,

finally I can report, that my Umarim Lite is fully working again.
I had to replace the LPC2148, the ADXL345 and the GPS13 module.

Because it stopped working from one moment to the other I can only think of an ESD situation.
The repair costs me a lot of time, trying and testing - really no fun.

My advice: keep yourself grounded ;-)

Thanx to everyone who helped!
Cheers,
    Steffen

Am 18.01.2013 17:15, schrieb Steffen Spies:
Hi everyone,

my board is working again.
I've had checked almost everything, all parts around the USB, removed T1 for a new one, etc.
At the end I put a new LPC2148 on the Umarim and the system is back alive.
For some reason the processor seemed to be partly dead.

Thanx for you help,
     Steffen


Am 11.01.2013 20:21, schrieb Eduardo lavratti:
some weeks ago i had the ame problem.
i found a 1.5k resistor broken.

so ... check the resistor and DTA transistor around USB circuit.


Date: Fri, 11 Jan 2013 17:39:58 +0100
From: address@hidden
To: address@hidden
Subject: Re: [Paparazzi-devel] Umarim Lite v2: no contact, no flashing

I also checked VBUS: 3,3V between R8 & R13.


Am 11.01.2013 16:18, schrieb Steffen Spies:
Hi,

my Umarim Lite v2 board suddenly stopped working and I have no idea why.

What happened:
The board was running fine with a very basic software for a couple of days.
I decided to build a new software with some smaller changes, connected it via USB to the laptop, did a powercycle and ... nothing.

a) First idea, flashing failed, so I tried again and again and again, but flashing didn't work.
I checked /var/log/syslog (or dmesg), but the laptop (Ubuntu 12.10) doesn't detect the board at the USB port.

b) Next idea, maybe a broken bootloader:
Connected PPZUAV TFDI Utility board to UART0(disconnected GPS), P0.14 to GND, power on and a
$ make upload_bl PROC=GENERIC

The display showed the same result as described here: http://paparazzi.enac.fr/w/images/thumb/Shell_bootloader_upload_success.jpg/180px-Shell_bootloader_upload_success.jpg
so I think that worked.

c) So the processor seems to be working, I checked 5V and 3.3V and the crystal produces a very clear 12 MHz signal.

d) I reconnected the board to the PC, checked dmesg, but nothing. No signs of life!
The Umarim has another USB connector via Molex, tried this too with same negative result.

e) Than I found this: Serial flashing
http://paparazzi.enac.fr/wiki/Compiling#Serial_Flashing

Conneted the FTDI board to the autopilot via UART0, P0.14 to GND, power on and I tried
make AIRCRAFT=TwinStar_Umarim ap.upload FLASH_MODE=ISP
Well, a lot of dots, but no flashing of the board.
Interestingly it says: no USB device (FTDI is found at ttyUSB0 and user is part of dialout group)

My questions:
- does anyone has an idea what I could check, test, measure, nameit?
- does serial flashing really work?
- did the first procedure make the right bootloader?
- does the bootloader give a kind of "hello world" via UART0/1?
- did I miss something?
- It looks to me, that the processor is running (crystal makes a clear signal, bootloader programming works)
-
I already tried a second laptop and USB cable

Thanx for help!
    Steffen



_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel


_______________________________________________ Paparazzi-devel mailing list address@hidden https://lists.nongnu.org/mailman/listinfo/paparazzi-devel


_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel



_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel


reply via email to

[Prev in Thread] Current Thread [Next in Thread]