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/* ch4-12.c - 七段數(shù)碼管驅(qū)動程序 *///==聲明區(qū)============================================#include<reg52.h> //包含單片機(jī)寄存器定義的頭文件
#define SEG P3 //宏定義，用標(biāo)識符SEG代替P0
#define uint unsigned int //宏定義，用uint代替unsigned int#define uchar unsigned char //宏定義，uchar代替unsigned char
//0~9的共陽數(shù)碼管段碼表code uchar TAB2[10]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90};sbit PD5=P1^7;void delay(uint ms); // 聲明延遲函數(shù) //==主程序區(qū)========================================
void main(void) //主程序開始 { uchar i; //聲明無符號整數(shù)變量i while(1) //無窮循環(huán),程序一直跑 for(i=0;i<10;i++) //顯示0-9,共10次 { SEG=TAB2[i]; //共陽數(shù)碼管顯示數(shù)字0~9 if((1 == i)||(2 == i)|| (3 == i)||(7 == i)) PD5 = 1; else PD5 =0; delay(500); //延遲500*1m=0.5秒 } //for循環(huán)結(jié)束 } //主程序結(jié)束
//==子程序區(qū)==========================================/* 延遲函數(shù),延遲約x*1ms */void delay(uint x) //延遲函數(shù)開始 { uint i,j; //聲明無符號整數(shù)變量i,j for(i=0;i<x;i++) //計(jì)數(shù)x次,延遲x*1ms for(j=0;j<120;j++); //計(jì)數(shù)120次，延遲1ms } //延遲函數(shù)結(jié)束

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/* ch4-12.c - 七段數(shù)碼管驅(qū)動程序 */
//==聲明區(qū)============================================
#include<reg52.h> //包含單片機(jī)寄存器定義的頭文件
#define SEG P3 //宏定義，用標(biāo)識符SEG代替P0
#define uint unsigned int //宏定義，用uint代替unsigned int
#define uchar unsigned char //宏定義，uchar代替unsigned char
//0~9的共陽數(shù)碼管段碼表
code uchar TAB2[10]={0xc0, 0xf9, 0xa4, 0xb0, 0x99,0x92, 0x82, 0xf8, 0x80, 0x90};
sbit PD5=P1^7;
void delay(uint ms); // 聲明延遲函數(shù)
//==主程序區(qū)========================================
void main(void) //主程序開始
{
uchar i; //聲明無符號整數(shù)變量i
while(1) //無窮循環(huán),程序一直跑
for(i=0;i<10;i++) //顯示0-9,共10次
{
SEG=TAB2[ i]; //共陽數(shù)碼管顯示數(shù)字0~9
PD5= TAB2[ i]&(0x01<<5);
delay(500); //延遲500*1m=0.5秒
SEG=0xff;
PD5 = 1;
} //for循環(huán)結(jié)束
} //主程序結(jié)束
//==子程序區(qū)==========================================
/* 延遲函數(shù),延遲約x*1ms */
void delay(uint x) //延遲函數(shù)開始
{ uint i,j; //聲明無符號整數(shù)變量i,j
for(i=0;i<x;i++) //計(jì)數(shù)x次,延遲x*1ms
for(j=0;j<120;j++); //計(jì)數(shù)120次，延遲1ms
} //延遲函數(shù)結(jié)束

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