Omega OME-PIO-D144 manual CN1PC1

for (;;)

{

printf("\n(CNT_L, CNT_H) = (%d,%d) (%d,%d) (%d,%d) (%d,%d) %x", CNT_L1,CNT_H1,CNT_L2,CNT_H2,CNT_L3,CNT_H3,CNT_L4,CNT_H4,

int_num);

if (kbhit()!=0) {getch(); break;}

}

outp(wBase+5,0);	/* disable all interrupt */
PIO_DriverClose();
}
/* ------------------------------------------------------------		*/
/* Use PC0 as external interrupt signal		*/
WORD init_low()
{
DWORD dwVal;
disable();
outp(wBase+5,0);	/* disable all interrupt */
if (wIrq<8)

{

irqmask=inp(A1_8259+1);

outp(A1_8259+1,irqmask & (0xff ^ (1 << wIrq))); setvect(wIrq+8, irq_service);

}

else

{

irqmask=inp(A1_8259+1);	/* IRQ2 */
outp(A1_8259+1,irqmask & 0xfb);

outp(A1_8259+1,irqmask & (0xff ^ (1 << wIrq))); irqmask=inp(A2_8259+1); outp(A2_8259+1,irqmask & (0xff ^ (1 << (wIrq-8)))); setvect(wIrq-8+0x70, irq_service);

}

invert=0x05;		/*	CN1_PC0 = non-inverte input */
outp(wBase+0x2a,invert);
/*	CN1_PC1		=	inverte input */
/*	CN1_PC2		= non-inverte input */
/*	CN1_PC3		= non-inverte input */
now_int_state=0x0a;		/* Now	CN1_PC0 = low		*/
/*	CN1_PC1		= high		*/
/*	CN1_PC2		= low		*/
/*	CN1_PC3		= high		*/

CNT_L1=CNT_L2=CNT_L3=CNT_L4=0;		/* low pulse count */
CNT_H1=CNT_H2=CNT_H3=CNT_H4=0;		/* high pulse count */
int_num=0;	/* enable interrupt PC0,PC1,PC2,PC3 of CN1 */
outp(wBase+5,0x0f);
enable();
}

void interrupt irq_service()

{

char cc;

int_num++;

new_int_state=inp(wBase+0x07)&0xff; int_c=new_int_state ^ now_int_state;

OME-PIO-D144 User’s Manual (Ver.2.1, Sep/2001) ---- 44