动态扫描.c

利用DS18B20测量出温度

/****************************************
*动态扫描
*P0段码,P2位码,均为0有效
***************************************/
#include<reg51.h>
#define uchar unsigned char
/*************动态扫描函数**************
*功能:将显示缓冲区的数据动态扫描输出

***************************************/

uchar disp_buf[8]={0x10,0x10,0x10,0x10,0x10,0,0,0};

void display() 
{
   	static char i=0;
 	unsigned char code duanma[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,//0-9
											 0X88,0X83,0XC6,0XA1,0X86,0X8E,0XFF};//ABCDEF,"灭"
	unsigned char code weima[8]={0XFE,0XFD,0XFB,0XF7,0XEF,0XDF,0XBF,0X7F};//位码
	P2=0xff;
	P0=duanma[disp_buf[i]];
	if(i==6)	P0&=0X7F;
	P2=weima[i];
	if(++i==8)i=0;
}