Hi, Carl.
You can put asm("") inside the while loop to prevent whole loop optimized away.
int main() {
int i = 0;
while (1) {
i++;
asm(""); // __asm__ __volatile__ ("");
}
}
The pros of this workaround is that the variable i is allocated on register.
2010/2/20 Carl <[email protected]>:
> I'm sure that I'm missing some basic here but I'm not sure what. The
> first variable on the stack is in an unexpected location. I would expect
> it to be located somewhere on the stack in RAM (0x30ff-0x1100) but it is
> located in flash memory and it does not get set or incremented.
>
>
> #include <io.h>
>
> int main()
> {
> int i=0;
> while(1)
> i++;
> }
>
> msp430-gcc -g -O0 -mmcu=msp430x2618 -I/opt/msp430/4.4.2/include main.c
>
> (gdb) load a.out
> Loading section .text, size 0x46 lma 0x3100
> Loading section .vectors, size 0x40 lma 0xffc0
> Start address 0x3100, load size 134
> Transfer rate: 1 KB/sec, 33 bytes/write.
> (gdb) c
> Continuing.
> ^C
> Program received signal SIGINT, Interrupt.
> main () at main.c:7
> 7 i++;
> (gdb) p &i
> $1 = (int *) 0x3102
>
>
>
>
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--
たかおかはちからをためている
takaoka is charging up
