Omega Vehicle Security OME-PIO-D56 manual DEMO4

4.5DEMO4

/* demo 4	: Count high pulse of PC0		*/
/*	(initial High & active Low)		*/
/* step 1	: run DEMO4.EXE		*/
/* --------------------------------------------------------------			*/
#include "PIO.H"
#define A1_8259		0x20
#define A2_8259		0xA0
#define EOI		0x20

WORD init_high();

WORD wBase,wIrq;

static void interrupt irq_service(); int COUNT,irqmask,now_int_state;

int main()

{

int i,j;

WORD wBoards,wRetVal,t1,t2,t3,t4,t5,t6;

WORD wSubVendor,wSubDevice,wSubAux,wSlotBus,wSlotDevice; char c;

clrscr();
/* step1 : find address-mapping of PIO/PISO cards		*/
.
.	/* select card_0 */
/* step2 : enable all D/I/O port
	/* /RESET -> 1	*/
outportb(wBase,1);		*/
/* step3 : configure I/O direction		*/
outportb(wBase+0xcc,0x00);	/* set CON3 as D/I ports */
COUNT=0;
init_high();
printf("\n\n***** show the count of Low_pulse *****\n");
for (;;)
{
gotoxy(1,7);
printf("\nCOUNT=%d",COUNT);
if (kbhit()!=0) break;
}	/* disable all interrupt */
outportb(wBase+5,0);
PIO_DriverClose();
}
/* Use PC0 as external interrupt signal		*/
WORD init_high()
{
disable();	/* disable all interrupt */
outportb(wBase+5,0);
if (wIrq<8)
{
irqmask=inportb(A1_8259+1);
outportb(A1_8259+1,irqmask & 0xff ^ (1<<wIrq));
setvect(wIrq+8,irq_service);
OME-PIO-D56/OME-PIO-D24 User Manual (Ver.2.1, Oct/2003)		---- 45