gpr.c

C51驱动标准PC键盘的程序

#include "Gpr.h"
#include "Kb.h"

void print_hexbyte(unsigned char i)
{
	unsigned char h, l;

	h = i & 0xF0; 		// High nibble
	h = h >> 4;
	h = h + '0';
	if (h > '9')
		h = h + 7;
	l = (i & 0x0F) + '0';	// Low nibble
	if (l > '9')
		l = l + 7;
	//putchar(h);
	//putchar(l);
	put_kbbuff(h);
	put_kbbuff(l);
}


void delay(char d)
{
	char i,j; //, k;

	for(i=0; i<d; i++)
		for(j=0; j<40; j++)
			;//for(k=0; k<176; k++);
}