Debugging First Boot

Hardware related problems and workarounds

Debugging First Boot

Postby Janos » Thu Mar 06, 2014 1:30 pm

I am having problems getting my board to boot.

Had an issue with the size of the SD card: http://forums.parallella.org/viewtopic.php?f=48&t=968.

I've since tried with Shodruk's Linaro Nano image and 9600's Debian 7.0 image. The images were installed with no errors reported. They were sync'ed before removal. I can mount the partitions and view files.

Board is connected to a bench supply delivering 5.000 Volts. The supply can deliver 5 Amps at 5 Volts. I tested, today, the output of the bench supply using a quality volt metre.
Board connections: cat5 to the RJ45 connector and the 5 Volt supply. No other connection at this time, including USB or HDMI.

The board green LED comes on and stays on, no other LED's light. The RJ45 connector lights never come on.
After a minute or so, I connect the HDMI and there is no output.
The board consumes a steady 0.170 to 0.180 Amps.


Any ideas?
Last edited by Janos on Thu Mar 06, 2014 2:29 pm, edited 1 time in total.
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am

Re: Debugging First Boot

Postby 9600 » Thu Mar 06, 2014 1:42 pm

Janos wrote:The board consumes a steady 0.170 to 0.180 Amps.


That definitely sounds like it's not booting! SD cards can be of incredibly variable quality and this is probably what I'd want to rule out first. I can recall in the early days of Raspberry Pi there being a lot of issues related to this...

I'd also suggest hooking up a serial console, but be careful to ensure that the adapter you use supports 3.3v logic levels! I'm always much more comfortable when I have one set up, as it means you can see where the boot process has got to and so you don't have to do so much guessing.

Cheers,

Andrew
Andrew Back (a.k.a. 9600 / carrierdetect)
User avatar
9600
 
Posts: 997
Joined: Mon Dec 17, 2012 3:25 am

Re: Debugging First Boot

Postby Janos » Thu Mar 06, 2014 2:18 pm

New SD card on order.

Can you recommend a Parallella serial console kit?

Cheers
Janos
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am

Re: Debugging First Boot

Postby 9600 » Thu Mar 06, 2014 3:00 pm

Janos wrote:New SD card on order.

Can you recommend a Parallella serial console kit?

Cheers
Janos


I have a collection of various USB/UART adapters and it's difficult to recommend one particular model. Just go to your favourite supplier and search for FT232 or FTDI — a popular and known to be well performing device/manufacturer — and select something that you can plug into your USB port, configure for 3v3 logic (it should have a jumper or switch) and easily cable up to the Parallella UART.

Cheers,

Andrew
Andrew Back (a.k.a. 9600 / carrierdetect)
User avatar
9600
 
Posts: 997
Joined: Mon Dec 17, 2012 3:25 am

Re: Debugging First Boot

Postby mranderso » Thu Mar 06, 2014 3:47 pm

Janos wrote:Can you recommend a Parallella serial console kit?


not the cheapest solution, but if you are looking for something requiring the least thought, I'd suggest:
http://www.adafruit.com/products/954

Warning for above cable: Windows 8 is not supported at this time

http://forums.parallella.org/viewtopic.php?f=23&t=887&p=5601#p5601 for connections.
User avatar
mranderso
 
Posts: 6
Joined: Mon Dec 17, 2012 3:28 am
Location: New Orleans, LA, US

Re: Debugging First Boot

Postby Janos » Thu Mar 06, 2014 4:57 pm

Thanks, I've put in an order for the serial kit.
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am

Re: Debugging First Boot

Postby Janos » Mon Mar 10, 2014 7:20 pm

I was wondering if there was an image or code base which tests the hardware?

How do you function test the hardware pre-shipping?
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am

Re: Debugging First Boot

Postby Janos » Tue Mar 11, 2014 4:39 pm

Thanks for your help guys, I am up and running.

Turned out to be two fold.

1. Faulty SD card. The board still will not boot from the 16GB card (with any image) even though no fault is reported by Linux on the card. The new card is 32GB and seems quite fast.

2. The power cable from my bench supply to the board was 1.5m long and quite thin. I suspect it was limiting the current flow too much, that or had some internal damage. A nice short, fat cable installed and the board booted first time. Board currently running at 5.090V and 1.296 to 1.307A.

Thanks again for your help. Much appreciated.
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am

Re: Debugging First Boot

Postby 9600 » Tue Mar 11, 2014 4:51 pm

Fantastic to hear that you are up and running! Now looking forward to hearing about what you do with your board :)

Also it'd be great if you could update the Micro SD section on the VerifiedPeripherals wiki page, firstly with details of the confirmed working card, and then of the card you couldn't get to work under the unsuitable heading.

Cheers,

Andrew
Andrew Back (a.k.a. 9600 / carrierdetect)
User avatar
9600
 
Posts: 997
Joined: Mon Dec 17, 2012 3:25 am

Re: Debugging First Boot

Postby Janos » Tue Mar 11, 2014 5:23 pm

The card which works is a Kingston Digital SDC4/32GB-AMZ card. The 16GB card has already been thrown out.
Janos of The Scottish BOINC Team
http://www.tsbt.co.uk
Janos
 
Posts: 51
Joined: Sun Feb 24, 2013 8:31 am


Return to Troubleshooting

Who is online

Users browsing this forum: No registered users and 5 guests

cron