From: Andrew K. (m. l. account) <ak...@mi...> - 2010-09-17 15:51:12
|
On Friday, September 17, 2010 11:30:17 am Dave Hylands wrote: > So, does it behave the same when using a normal (i.e. gumstix) > daughtercard? Or just your daughtercard? The reboots on UART RX data occur with both the Tobi and my expansion board. > Often times, sudden reboots are caused by current surges. Perhaps the > daughtercard is borderline in terms of the amount of power it can > provide and the new rev draws just a bit more current? Yep, but my supply can source considerably more current than the Tobi supply can. It's an LM5071 based supply pulling power from a bench supply or PoE switch. In order to further test this theory as well, I have tried driving up the current consumption on the COM through heavy CPU/network use. It won't spontaneously reboot unless traffic is seen on UART3 RX. I've asked Gumstix if anything may have changed in the pin muxing that might lead to the UART3RX pin not actually being set to the correct peripheral. I certainly appreciate your ideas and theories! Do you have any R2766 rev boards? Which COMs do you use? -A. |