Omega OME-PIO-D144 manual Refer to DEMO4.C for source code

Example 2: assume initial level=High, PC0 is used as interrupt source:

Initial=High Inverted=Low

Iniaial_sub()

{ now_int_state=1

_outpd(wBase+0x2a,1) /*(select the inverted signal)*/

ISR_sub()

{

If (now_int_state==0) /* old state=low Æ change to high now */

{
now_int_state=1;	/* now int_signal is High		*/
/*** application codes are given here ***/
_outpd(wBase+0x2a,1);		/* select the inverted signal		*/
}
else	/* old state=highÆ change to low now			*/
{
now_int_state=0;		/* now int_signal is Low		*/

/*** application codes are given here ***/

_outpd(wBase+0x2a,0);	/* select the non-inverted signal */
}
if (wIrq>=8) outp(A2_8259,0x20);		/*	EOI	*/
outp(A1_8259,0x20);		/*	EOI	*/

}

Refer to DEMO4.C for source code.

OME-PIO-D144 User’s Manual (Ver.2.1, Sep/2001) ---- 10