sy2.c

这是一个单片机键盘响应程序

	//PB port as led data port
#define LED_DATA_DDR DDRB
#define LED_DATA_PORT PORTB
#define LED_DATA_PIN PINB

//PD port as led select port
#define LED_ADD_DDR DDRD
#define LED_ADD_PORT PORTD
#define LED_ADD_PIN PIND

	#include <avr/io.h>
	#include <inttypes.h>
	#include <avr/interrupt.h>
	#include <avr/signal.h>
	#include "Key.h"  //此文件包含上面的Keyboard()函数
	uint8_t ledcode[16]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x67,0x77,0x7C,0x58,0x5E,0x79,0x71};
	
	void Initi_Device(void)
{


	LED_ADD_DDR=0xFF;
	LED_ADD_PORT=0xFE;

	LED_DATA_DDR=0xFF;
	LED_DATA_PORT=0x3F;

}




	
	SIGNAL(SIG_OVERFLOW0)
	{ static uint8_t Keynum=16;
	   TCNT0=0xB2;
	   Keynum=Keyboard(); //读取键盘值
	   if(Keynum<16)
	   LED_DATA_PORT=ledcode[Keynum];
	}
	
	

	
	int main(void)
	{Initi_Device();

	   DDRC=0x0F;
	   PORTC=0xFF;
	   DDRD=0xFF;
	   PORTD=0x00;
	   DDRB=0xFF;
	   PORTB=0x00;
	   TCCR0=5;
	   TCNT0=0xB2;
	   TIMSK=(1<<TOIE0);
	   sei();
	   for (;;)
	   	{}}