main.c

C51驱动标准PC键盘的程序

#include <Atmel\AT89X52.h>
#include "Pindefs.h"
//#include "serial.h"
#include "gpr.h"
#include "kb.h"


int __low_level_init(void)
{
	/*UBRR = 12;	// 19200bps@4MHz
	UCR = 0x08;	// TX enable
	GIMSK= 0x40;	// Enable INT0 interrupt
	*/
	EA = 0;		//disable interrupt

	PX0 = 1;	//high priority
	EX0 = 1;	//enable INT0
	IT0 = 1;	//falling edge triger	
	INT0 = 1;	//software reset, kbd clock

	ET0 = 1;	//enable T0
	PT0 = 0;	//low priority

	PIND = 1;	//data reset, kbd data
	TMOD = 0x01;	
	TH0 = 0;
	TL0 = 0;
	TR0 = 0;
	EA = 1;
	return 1;
}


void clr(void)
{
	P1 = 0xFF;
}


void main(void)
{
	unsigned char key;

	__low_level_init();
	//init_uart();	// Initializes the UART transmit buffer
	init_kb();	// Initialize keyboard reception

	while(1)
	{
		P1 = key=getchar();
		delay(10);
	}
}