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Users Manual & Installation Guide
PV-
SERIES
16
D
IGITAL INPUTS
,
48
D
IGITAL OUTPUTS
Page 5 of 8
Software example:
/* Compiler: Borland C++ 3.1 */
#include <stdio.h>
#include <dos.h> /* For inportb() and outportb() */
#define BASEADDR 0x300 /* This must match with SW1 on the PV1648 */
#define OUTBYTE0 (BASEADDR+0)
#define OUTBYTE1 (BASEADDR+1)
#define OUTBYTE2 (BASEADDR+2)
#define OUTBYTE3 (BASEADDR+3)
#define OUTBYTE4 (BASEADDR+4)
#define OUTBYTE5 (BASEADDR+5)
#define INBYTE0 (BASEADDR+6)
#define INBYTE1 (BASEADDR+7)
int main (void)
{
unsigned char value;
/* Show input 0-7 */
value = inportb (OUTBYTE0);
printf ("Input 0 = %d\n", (value>>0) & 0x01);
printf ("Input 1 = %d\n", (value>>1) & 0x01);
printf ("Input 2 = %d\n", (value>>2) & 0x01);
printf ("Input 3 = %d\n", (value>>3) & 0x01);
printf ("Input 4 = %d\n", (value>>4) & 0x01);
printf ("Input 5 = %d\n", (value>>5) & 0x01);
printf ("Input 6 = %d\n", (value>>6) & 0x01);
printf ("Input 7 = %d\n", (value>>7) & 0x01);
/* Show input 8-15 */
value = inportb (OUTBYTE1);
printf ("Input 8 = %d\n", (value>>0) & 0x01);
printf ("Input 9 = %d\n", (value>>1) & 0x01);
printf ("Input 10 = %d\n", (value>>2) & 0x01);
printf ("Input 11 = %d\n", (value>>3) & 0x01);
printf ("Input 12 = %d\n", (value>>4) & 0x01);
printf ("Input 13 = %d\n", (value>>5) & 0x01);
printf ("Input 14 = %d\n", (value>>6) & 0x01);
printf ("Input 15 = %d\n", (value>>7) & 0x01);
/* Examples of output operations on DO0 – DO7 */
outportb (OUTBYTE0, 0x01); /* Make /DO0 active, all others off */
outportb (OUTBYTE0, 0x02); /* Make /DO1 active, all others off */
outportb (OUTBYTE0, 0x04); /* Make /DO2 active, all others off */
outportb (OUTBYTE0, 0x08); /* Make /DO3 active, all others off */
outportb (OUTBYTE0, 0x10); /* Make /DO4 active, all others off */
outportb (OUTBYTE0, 0x20); /* Make /DO5 active, all others off */
outportb (OUTBYTE0, 0x40); /* Make /DO6 active, all others off */
outportb (OUTBYTE0, 0x80); /* Make /DO7 active, all others off */
outportb (OUTBYTE0, 0x81); /* Make /DO0 & /DO7 active, all others off */
return 0;}