Solved! Go to Solution.
Can you, please, specify the following information:
It's pretty strange, but sounds like some driver-to-dev.system incompatibility.
Many thanks for your help intention. I found solution. It was mistake in our laboratory. I used wrong board. It was realy 7811 I had in my PC. Right card (7813) was on the shelf.
Life is funny, but sometimes we loose a lot of time and resources by mistake.
Thanks and regards
This task should be closed now.