disp.c

采用1*4,4*4键盘同时控制,带有8位数码显示的数控直流电源驱动及应用程序(Keil c51)

//#include "reg51.h"


unsigned char code led_dat[] = {0xed, 0x81, 0xf4, 0xb5,0x99,0x3d,0x7d,0x85,0xFd,0xbd,
                          /*--    0    1     2     3    4    5    6     7    8    9  --*/
                               0xdd,  0x79, 0x6c, 0xf1, 0x7c, 0x5c, 0xe9,  0x20, 0x00,0X02,0x68,0x78};
                          /*--    A     b      C     d    E    F    16 U   17 -   18    19  20 L//小数点0x02*/
unsigned char Disp_Buf[8];//显示缓冲区

#define LED_BIT P3
#define LED_SEG P0

void Disp (void)
{
	unsigned int j;
	unsigned char i, Temp_Data;
    Temp_Data = 0x00;
    for( i = 0; i < 8; i++ )//6位数码管显示
    {
       LED_BIT = LED_BIT&0xf8|Temp_Data;
	   if(i==1 || i==4)
	   {
       		LED_SEG = (led_dat[Disp_Buf[i]] | 0x02 );
	   }
           else
	   {
            LED_SEG = led_dat[Disp_Buf[i]];
            }
       for( j = 0; j < 300; j++ ); //短延时
	   LED_SEG = led_dat[18]; //消隐
       Temp_Data = Temp_Data+1;
    }
}