ps2test.c

Keyboard drivere, as asas

/*********************************************************/
/*	REncoder  - R8822 INT2 Example by                    	*/
/*	Lima Endustriyel Bilgisayar, March 2004 - Cem Celik 	*/
/*	Counts Pulses Generated by a Rotary Encoder				*/
/*	Uses Console, INT2 and Pin0 of Port C :	 				*/
/*                                                       */
/* Channel A of the Encoder is connected to INT2         */
/*				  and provides the "quantitive" pulses		   */
/* Channel B is connected to Pin 0 of PortC              */
/*				  and provides direction info         			*/
/* The supply voltage of the Encoder is +5VDC				*/
/*	Encoder's "Ground" needs to be common with the SBC		*/
/*	A & B voltage is approx. 3.5V									*/
/*																			*/
/* V.1.1: Corrected INT related errors per Ed's warnings */
/*																			*/
/*********************************************************/
#define TRUE  1
#define FALSE 0

#include <stdio.h>

#include <dos.h>
#include <conio.h>

#include <time.h>

#include <string.h>

#include "r8822.h"

extern void interrupt ps2_int(void);
extern void ps2_startint(void);
extern int 	ps2_getkey(short* key, short* shift);
extern void ps2_stopint( void );

void interrupt (*oldint)();		// to store old ISR vector
void waitmilli(long);


void main ( void )
{

	char ch;									// keypressed
	char ok = TRUE;                  // control for the endless loop
	short key, shift;
	puts("\nPS/2 Keyboard Test Application for FL186 Ver.1.01");
		puts("by Lima Endustriyel Bilgisayar - www.lima.com.tr");
	outportb(0x0606,  (inportb(0x0606)  & 0xFB)); 	//Set Port C as Input

	disable();
		oldint = getvect(INT2NDX );     // Save old vector
		setvect(INT2NDX , ps2_int); // Set new one
		ps2_startint();
	enable();


	while( ok )
	{

		waitmilli(40);
		if (kbhit())
		{
			ch = getch();						// Get keypress
			if ( ch == 0x1B ) ok = FALSE; // Exit if [Esc] is pressed
		}

		 if (ps2_getkey(&key, &shift))
		 {
				fprintf(stderr, "KEY: %2.2X: SHIFT : %2.2X\n", key, shift);
		 }

	}
	printf("\n");
	ps2_stopint();


	// turn off the interrupt(s) and restore vector(s) to their old values
	disable();
		setvect(INT2NDX , oldint);
	enable();

	return;
}


// Replacement for Delay //
void waitmilli(long milli)
{

	long ltick = clock();
		while ( ((clock()- ltick) <=  milli) && (ltick <= clock()) ){;}
}