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使用此头文件需先包含头文件：
#include <8051.h>
#include
*/
uchar __code smgduan[] = {
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,
0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71, 0x00};
void shumaguan(uchar duan, uchar wei)
{
switch (duan)
{
case 1:
P2 &= 0xE3; //1110 0011 相当于LSC=0；LSB=0；LSA=0;
break;
case 2:
P2 &= 0xE7; //1110 0111 相当于LSC=0；LSB=0；LSA=1;
break;
case 3:
P2 &= 0xEB; //1110 1011 相当于LSC=0；LSB=1；LSA=0;
break;
case 4:
P2 &= 0xEF; //1110 1111 相当于LSC=0；LSB=1；LSA=1;
break;
case 5:
P2 &= 0xF3; //1111 0011 相当于LSC=1；LSB=0；LSA=0;
break;
case 6:
P2 &= 0xF7; //1111 0111 相当于LSC=1；LSB=0；LSA=1;
break;
case 7:
P2 &= 0xFB; //1111 1011 相当于LSC=1；LSB=1；LSA=0;
break;
case 8:
P2 &= 0xFF; //1111 1111 相当于LSC=1；LSB=1；LSA=1;
break;
default:
break;
}
switch (wei)
{
case 0:
smg_wei = smgduan[0];
break;
case 1:
smg_wei = smgduan[1];
break;
case 2:
smg_wei = smgduan[2];
break;
case 3:
smg_wei = smgduan[3];
break;
case 4:
smg_wei = smgduan[4];
break;
case 5:
smg_wei = smgduan[5];
break;
case 6:
smg_wei = smgduan[6];
break;
case 7:
smg_wei = smgduan[7];
break;
default:
break;
}
}