topic Read Accumulator Register from C in CodeWarrior for MCU

Read Accumulator Register from C

jimw — Wed, 01 Mar 2006 06:10:48 GMT

Is there a simple efficient way to move the contents of Reg A to a variable in C?

jimw — Wed, 01 Mar 2006 10:08:54 GMT

I think I found it.

char t;

__asm {
sta t
}

compiles as:

TSX

STA ,X

bigmac — Wed, 01 Mar 2006 16:40:13 GMT

Hello JimW,

Whenever a function returns a char value, the returned value will be in the accumulator. So the following seems to work OK.

char funcA(void) {

asm lda TCNTL; /* Low byte of timer reg */

}

char value;

value = funcA();

Regards,
Mac