lesson4_1.c

天祥的所有pic 源程序

#include<pic.h>
#define uchar unsigned char
#define uint  unsigned int
__CONFIG(0x3B31);
const uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
                        0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar key_num;
void delay(uint x);
void init();
void scan();
void didi(uchar num);
void disp();
void main()
{
	init();
	while(1)
	{
		scan();
		disp();
	}	
}
void delay(uint x)
{
	uint a,b;
	for(a=x;a>0;a--)
		for(b=110;b>0;b--);
}
void init()
{
	TRISB=0x0f; //B口第4位输入，高四位输出
		TRISD=0;
	TRISA=0;
	TRISE0=0;
	RE0=0;
	PORTD=0;
	PORTA=0xff;// 数码管选通
}
void scan()
{
	uchar key_tem;
	PORTB=0x7f;//0111 1111
	key_num=PORTB;
	key_num=key_num&0x0f;
	if(key_num!=0x0f)
	{
		delay(10);
		key_num=PORTB;
		key_num=key_num&0x0f;
		if(key_num!=0x0f)
		{
			key_tem=key_num;
			didi(1);
			while(key_tem!=0x0f)
			{
				key_tem=PORTB;
				key_tem=key_tem&0x0f;
			}	
			key_num=key_num|0x70;
		}
	}
	else
	{
		PORTB=0xBf;//1011 1111
		key_num=PORTB;
		key_num=key_num&0x0f;
		if(key_num!=0x0f)
		{
			delay(10);
			key_num=PORTB;
			key_num=key_num&0x0f;
			if(key_num!=0x0f)
			{
				key_tem=key_num;
				didi(1);
				while(key_tem!=0x0f)
				{
					key_tem=PORTB;
					key_tem=key_tem&0x0f;
				}	
				key_num=key_num|0xb0;
			}
		}
		else
		{
			PORTB=0xdf;//1101 1111
			key_num=PORTB;
			key_num=key_num&0x0f;
			if(key_num!=0x0f)
			{
				delay(10);
				key_num=PORTB;
				key_num=key_num&0x0f;
				if(key_num!=0x0f)
				{
					key_tem=key_num;
					didi(1);
					while(key_tem!=0x0f)
					{
						key_tem=PORTB;
						key_tem=key_tem&0x0f;
					}	
					key_num=key_num|0xd0;
				}
			}
			else
			{
				PORTB=0xef;//1011 1111
				key_num=PORTB;
				key_num=key_num&0x0f;
				if(key_num!=0x0f)
				{
					delay(10);
					key_num=PORTB;
					key_num=key_num&0x0f;
					if(key_num!=0x0f)
					{
						key_tem=key_num;
						didi(1);
						while(key_tem!=0x0f)
						{
							key_tem=PORTB;
							key_tem=key_tem&0x0f;
						}	
						key_num=key_num|0xe0;
					}
				}
			}	
		}		
	}
}
void disp()
{
	switch(key_num)
	{
		case 0xee:PORTD=table[0];break;//1110
		case 0xed:PORTD=table[1];break;//1101
		case 0xeb:PORTD=table[2];break;//1011
		case 0xe7:PORTD=table[3];break;//0111
		case 0xde:PORTD=table[4];break;
		case 0xdd:PORTD=table[5];break;
		case 0xdb:PORTD=table[6];break;
		case 0xd7:PORTD=table[7];break;
		case 0xbe:PORTD=table[8];break;
		case 0xbd:PORTD=table[9];break;
		case 0xbb:PORTD=table[10];break;
		case 0xb7:PORTD=table[11];break;
		case 0x7e:PORTD=table[12];break;
		case 0x7d:PORTD=table[13];break;
		case 0x7b:PORTD=table[14];break;
		case 0x77:PORTD=table[15];break;
	}
}

void didi(uchar num)
{
	uchar di_num;
	for(di_num=num;di_num>0;di_num--)
	{
		RE0=1;
		delay(50);
		RE0=0;
		delay(20);
	}
}