On Thu, Nov 20, 2008 at 04:22:58PM +0100, Robert Brusa wrote: > Hi, > in my system, I have a cyg_user_start() as well as a main() function. The > first includes calls to initialize various modules. main() contains an > eternal loop and is assumed to work as a normal thread. The problem is > that main produces a hanger when I call cyg_spi_transfer to read my > onboard-RTC. When using this RTC-module in a test program with a single > thread it works. It also works (in main) when I change the transfer-mode > to polling. This let me think that there is some kind of priority > problem.
I would not necessarily agree with this. If it is a priority problem, it suggests one of the threads running with higher priority than main is spinning, so stopping main from running. This is normally a bug. However this does not really fit with PIO working. This actually sounds like an interrupt problem. I would put a breakpoint on the interrupt handler and see if it gets called. Andrew -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
