Hello,
I'm looking into a Memmanage Fault which occurs in a project developed with Keil 3.40. It happens after long time after power up. The memmanage handler is B . (a branch to itself).
In this link (img337.imageshack.us/.../memmanagefault.jpg) there's a uVision screenshot. In the memory area there's the MSP stack, in Disassemble area there's the program I think it was been executing when abort occurred.
In 0x080072E4 there's a PUSH {R4,LR} instruction.
This software runs on a STM32F103R8, which has 20KB RAM (0x20000000-0x20004FFF) and 64KB of Flash (0x08000000-0x0800FFFF). I don't figure why the Memmanage fires. Pointers were pointing in RAM area. Can someone helps me, please?
Best regards,
Lorenzo
Definitive guide to the ARM Cortex-M3
==>
The NVIC contains a Memory Management Fault Status Register (MFSR) to indicate the cause of the memory management fault. If the status register indicates that the fault is a data access violation (DACCVIOL bit) or an instruction access violation (IACCVIOL bit), the offending code can be located by the stacked program counter. If the MMARVALID bit in the MFSR is set, it is also possible to determine the memory address location that caused the fault from the Memory Management Address Register (MMAR) in the NVIC.
thanks for your help. This could be very useful, but unfortunately not in my case, I think... This register is 0x400... all significative bits are zero.
thanks in advance!