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ST10 / C167 Watchdog

Charles Pinkstone

I would like to store a copy of the watchdog control register (WDTCON) before the EINIT instruction in my START167 assembler file.

I then want to access this variable later in a C module, to determine reason for reset.

What is the best way of doing this? Does anybody have any example code for this?

Thanks in advance

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    Here is one way to do it. In START167.A66, put the following before the EINIT:

    WDTCON DEFR 0FFAEH
EXTRN DPP3:wdtcon_copy:WORD
MOV wdtcon_copy,WDTCON
    In your C program:
    #pragma NOINIT
int sdata wdtcon_copy;
#pragma INIT
    After that you can access wdtcon_copy normally. The sdata was used to make sure that DPP3 can be used to access the variable.

    - mike

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  • 0

    Here is one way to do it. In START167.A66, put the following before the EINIT:

    WDTCON DEFR 0FFAEH
EXTRN DPP3:wdtcon_copy:WORD
MOV wdtcon_copy,WDTCON
    In your C program:
    #pragma NOINIT
int sdata wdtcon_copy;
#pragma INIT
    After that you can access wdtcon_copy normally. The sdata was used to make sure that DPP3 can be used to access the variable.

    - mike

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