11-17-2011 10:45 AM
Hello, we are working with embedded linux on the ML507 board with a power PC into the virtex 5. The linux distributions are generated using POKY platform builder. We have two ML507, one with a "rev 1" tag on the bag it comes packed in, the other one says "rev 4". in "rev 1" everything runs just fine, the bitstream is written from the compact flash and the linux system is started through u-boot without any trouble. Unfortunately on rev 4 it does not work. Which are the differences (if any) between rev 1 and rev 4. We think there must be something different and haven't found any info about it.
Thanks in advance
11-17-2011 01:12 PM
11-17-2011 01:26 PM
Did you read through this thread:
I suspect that similar to that post, the problem has nothing to do with linux....
Use this thread link instead, in case you have trouble:
-- Bob Elkind
11-17-2011 03:58 PM
Thanks for your answers, i've already read that thread, I do think it something similar. What I think is that the problem has nothing to do with linux as it runs correctly on the old board. So we think there's something different with the hardware, or some parameter related to it in the new board rev 4. Where would you suggest to start digging?. In the new board the boot process stops because some environment variables are missing for u-boot to use them. So I add them by hand and doing this the bitstream can be written and u-boot knows what to boot (:S). Unfortunately, after, uncompressing the kernel image and loading the device three, it stops working. Any suggestion?. Any hint would be greatly appreciated!
Thanks in advance.
11-17-2011 06:44 PM
> So we think there's something different with the hardware, or some parameter related to it in the new board rev 4.
There was only a single PCB version of the ML507 released and that is Rev A. If your two boards have labels that say rev 1 and 4 this is something that someone on your team did.
11-18-2011 01:43 PM
> There was only a single PCB version of the ML507 released and that is Rev A. If your two boards have labels that say rev 1 and 4 this is something that someone on your team did.
Actually, we didn't, but maybe those labels doesn't mean anything. However, there must be some differences between the boards, it's just that we haven't found anything yet.