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THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED
On 01/06/2005 at 09:13, xxxxxxxx wrote:
Hi, i have 1 question about inline assembly. as shown in the program listing below, if i remove "asm cli", "i=8, flag=5" statement will not be executed.....why the program doesn't work??? why inline assembly asm makes the difference? I'm hoping that i can get the answer here. please and thanks. #include <mc9s12dp256.h> /* derivative information */ #include "pll.h" /* defines _BUSCLOCK, sets bus frequency to _BUSCLOCK MHz */
void main(void) { unsigned int i, flag; /* set system clock frequency to _BUSCLOCK MHz (24 or 4) */ PLL_Init(); /* set port B as output (LEDs) */ DDRB = 0xff; // Port B is output /* allow all interrupts */ asm cli //weirdness happen here i = 8; if (i==8) { flag=5; } /* forever */ for(;;){} // remove this to make things even worse... }