自己做的51单片机测长度，oled显示 -

#include "REG51.h"
#include "oled.h"
#include "bmp.h"
# define uchar unsigned char
# define uint unsigned int
sbit D0=P3^2;
int motor=0,t=0,S=0,juli=0;
u8 shu,bai,shi,ge,distance;
u8 code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','.','M'};
u8 disbuff[5] ={ 0,0,0,0,0};
u8 buff[5] ={0,0,0,0,0} ;
u8 sbuff[5] ={0,0,0,0,0};
void delay (uint z)
{ uint x,y;
for (x=600;x>0;x--)
for (y=z;y>0;y--);
}
void INT_init (void)
{ EA=1;
EX0=1;
IT0=1;
}
void main(void )
{ OLED_Init(); //初始化OLED
OLED_Clear();
INT_init();
while (1)
{
OLED_ShowCHinese(0,0,0);
OLED_ShowCHinese(18,0,1);
OLED_ShowCHinese(36,0,2);
OLED_ShowCHinese(54,0,3);
distance=(motor/20)*22;
if(motor==256)
{ motor=0;
t++;
}
disbuff[0]=distance/1000;
disbuff[1]=distance%1000/100;
disbuff[2]=distance%100/10;
disbuff[3]=distance%10;
disbuff[4]=t;
OLED_ShowChar(0, 3, ASCII[disbuff[0]]);
OLED_ShowChar(15, 3, ASCII[disbuff[1]]);
OLED_ShowChar(30, 3, ASCII[12]);
OLED_ShowChar(45, 3, ASCII[disbuff[2]]);
OLED_ShowChar(60, 3, ASCII[disbuff[3]]);
OLED_ShowChar(75, 3, ASCII[13]);
OLED_ShowChar(120, 0, ASCII[disbuff[4]]);
S=256*t;
/* buff[0]=S/1000;
buff[1]=S/100;
buff[2]=S%100/10;
buff[3]=S%10;
OLED_ShowChar(0, 7, ASCII[buff[0]]); 0
OLED_ShowChar(15, 7, ASCII[buff[1]]);
OLED_ShowChar(30, 7, ASCII[12]);
OLED_ShowChar(45, 7, ASCII[buff[2]]);
OLED_ShowChar(60, 7, ASCII[buff[3]]);
OLED_ShowChar(75, 7, ASCII[13]);*/
juli=S+distance;
sbuff[0]=juli/1000;
sbuff[1]=juli%1000/100;
sbuff[2]=juli%100/10;
sbuff[3]=juli%10;
OLED_ShowChar(0, 7, ASCII[sbuff[0]]);
OLED_ShowChar(15, 7, ASCII[sbuff[1]]);
OLED_ShowChar(30, 7, ASCII[12]);
OLED_ShowChar(45, 7, ASCII[sbuff[2]]);
OLED_ShowChar(60, 7, ASCII[sbuff[3]]);
OLED_ShowChar(75, 7, ASCII[13]);
delay(50);
OLED_Clear();
}
}

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