20 Aug
2013
20 Aug
'13
12:15 p.m.
Hi Roger,
What are the symptoms you see when this issue triggers?
The symptoms are erroneous USB transaction, seen with a USB port analyzer. These only sometimes (not always) stall the USB communication, e.g. a USB mass storage device cant be read any longer.
What is the test case to trigger the error? Is it just running any USB I/O for long enough time?
Our scenario to reproduce was rebooting a warmed up board (either let it run for >5min or heat up in climate chamber).
However, the beagle probably uses a 26 MHz crystal oscillator (our board uses 19.2MHz), so the PLL5 dividers may be set in a way that the problem never occurs.
I have a beagle-xm (DM3730 ES1.2) with me and would like to reproduce the error.
cheers, -roger
regards, Andreas