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Hi, I have a Stack problem in an interrupt handler.
When I use a PUSH or CALL instruction, SP is correctly updated, but the memory at the address pointed by SP remains 0!! DPP3 = 3
I checked under monitor control, but the program in Flash still crashes.
STK_SIZE fields in SYSCON to 7 (in startup code): No wrapping: entire internal RAM used as stack.
The behavior with the simulator is OK.
The system stack is F800 - F880, and SP is in the correct range, problem detected with SP=F860.
I've tried the code with 2 C167CS cards, this should not be a hardware pb.
Thanks for any help,
Sorry, but I don't see the problem. If I understand you correctly, this only occurs in the interrupt handler when you make a push? Is there any way to show the disassembly or a small example so someone can have a better look to what could be happening?
The problem is that the memory is not updated after a PUSH. For instance, if * SP=0xF860 * the instruction PUSH R13 is executed (in the interrupt handler, under the control of the monitor, step by step), with R13=0xF432
Then SP is updated to 0xF85E (ok), but the memory at this address remains 0!!
I wonder if the memory is correctly refreshed by the monitor and my program crash with other reasons :-/ ?
Thanks for your help, M. briday
I found the error. The monitor was compiled with STKSZ (of SYSCON) set to 0, and it must be 7 (I managed stacks manually for different reasons) I changed this field to 7 in the start1167.a66 file, but this was not sufficent. That's why the monitor sent hazardous data to the IDE.