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Cortext M3 Program Counter Test

Muhammad Ahsan
Note: This was originally posted on 16th March 2011 at http://forums.arm.com

I am working with Cortex M3 and want to perfrom Stuck at (To check that none of the bit of PC is stuck at 0 or 1) test of Program Counter. Can anybody give me an idea how to implement this? Thanks in advance!
Parents
  • Note: This was originally posted on 21st March 2011 at http://forums.arm.com

    The device has MPU. I have actually figured out that it can be done by placing code (short subroutine) at 0x55..... and 0xAA..... locations in memory and then reading that location to verfiy whether the program counter has reached that particular locations. Now I have checkd that the memory locations (On chip SRAM, Code SRAM and Flash) are occupied with different types of code. At some memory locations I found ff pattern and on the others random patterns. Some locations were writeable others were not. I am confused, where how to select the area, which I want to write. If someone knows about some document or link that describe working with Cortex M3 memory specfically or any other generally, please let me know or just give me a hint here.
    Thanks
    ahsan


    Does your device have an MPU?
    --
    Marcus
Reply
  • Note: This was originally posted on 21st March 2011 at http://forums.arm.com

    The device has MPU. I have actually figured out that it can be done by placing code (short subroutine) at 0x55..... and 0xAA..... locations in memory and then reading that location to verfiy whether the program counter has reached that particular locations. Now I have checkd that the memory locations (On chip SRAM, Code SRAM and Flash) are occupied with different types of code. At some memory locations I found ff pattern and on the others random patterns. Some locations were writeable others were not. I am confused, where how to select the area, which I want to write. If someone knows about some document or link that describe working with Cortex M3 memory specfically or any other generally, please let me know or just give me a hint here.
    Thanks
    ahsan


    Does your device have an MPU?
    --
    Marcus
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