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/*
為自已寫的獨(dú)立鍵盤掃描
犯的錯(cuò)：unsigned密寫成了unsigner一直提示找不到a,b
PORTD0=1；不行，要寫成PORTD=0x01；才可以，如果一定要寫，應(yīng)寫為RD0=1;
PORTD=0x03;不是第三個(gè)燈亮，而是0000 0011是兩個(gè)燈亮
PORTD=0x8則是0000 1000是第4個(gè)燈亮。。。。。出錯(cuò)因原進(jìn)制轉(zhuǎn)化，剛開始寫程序進(jìn)制轉(zhuǎn)化混掉了。
*/
#include <pic.h>
#define uchar unsigned char
#define uint unsigned int
__CONFIG(0x3B31);
const unsigned char table[] = {0x3f,0x6,0x5b,0x4f,0x66,0x6d,0x7c,0x7,0x7f,0x6f}; //數(shù)碼管數(shù)組
void delay(uchar x) //延時(shí)函數(shù)
{
uint a,b;
for(a=x;a>0;a--)
for(b=110;b>0;b--);
}
void scan(); //掃描鍵盤函數(shù) 聲明
void init() //初始化函數(shù)
{
TRISB=0xff;
TRISD=0x00;
TRISC=0X00;
TRISD=0x00;
PORTC=0Xff;
PORTD=0x00;
}
//-------------------主函數(shù)-----------------------------------------------------------
void main()
{
init ();
while(1)
{
scan(); //掃描鍵盤
}
}
//-------------------------------------------------------------------------------------
void scan()
{
if(RB0==0)
{
delay(10);
while(!RB0) PORTD=0x01;
}
if(RB1==0)
{
delay(10);
while(!RB1) PORTD=0x02;
}
if(RB2==0)
{
delay(10);
while(!RB2) PORTD=0x04;
}
if(RB3==0)
{
delay(10);
while(!RB3) PORTD=0x08;
}
}

復(fù)制代碼