Hi all!
My problem started with migration from MDK 401 to MDK 410 and is still happening on all new versions. Compile on my old computer with MDK401 always produced a flawless code, while program compiled with a newer version of Keil never worked. Furthermore, even if I install 401 on a new clean system, the problem does not disappear anymore.
The program always crashes when exiting from interrupt (timer, serial, ...) in which an event flag was set (using isr_evt_set). The error appears in line 5 of the os function os_evt_psh (STRH R0,[R4,#0x18]), where the simulator reports an error: *** error 65: access violation at 0x00000118 : no 'write' permission. The error disappears by either disabling the interrupt or commenting the isr_evt_set call. However, it is not necessary that an interrupt with isr_evt_set call will crash. E.g. a serial interrupt with two isr_evt_set calls was working, but as I added another call, one of previously working calls started crashing. I am really lost, so any help would be appreciated! Target:LPC2148.
Regards,
Matic
Might you have too short queue configured?
I finally figured it out. It was not the queue size, although thanx for your suggestion.
The problem was calling isr_evt_set when the target task didn't exist. It all makes sense now, the event was written to a non-ram location, where the write permission triggered an error.
I just can't figure it out, why the same code was working on my old computer.
Regards, Matic