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#include<reg51.h>
#define PKEY P1
#define PDIG P2
sbit LSA = P3 ^ 0;
sbit LSB = P3 ^ 1;
sbit LSC = P3 ^ 3;
sbit IN0 = P3 ^ 4;
sbit IN1 = P3 ^ 5;
sbit E = P3 ^ 6;
unsigned char code smgnum[]={ 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//?????0~9??
unsigned char code smgmum[]={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//?????0~9??
unsigned int gd;
unsigned int num=99;
unsigned int keyswitch, tuiwei, wei = 0, x, y;
unsigned int box[8]={0};
unsigned int i;
void delay(unsigned int x) //延遲函數
{
unsigned int i, j;
for (i = 0; i < x; i++)
for (j = 0; j < 120; j++) ;
}
void kaishi() //電機正轉
{
IN0 = 1;
IN1 = 0;
delay(5);
}
void daofang() //電機倒轉
{
IN1 = 1;
IN0 = 0;
delay(5);
}
void int0_init(void) //開啟外部中斷
{
EX0=1;
IT0=1;
EA=1;
}
void key_scan() //矩陣鍵盤檢測函數
{
unsigned char temp0 = 0, temp1 = 0, temp = 0;
unsigned int a = 0;
PKEY = 0xf0;
if (PKEY != 0xf0)
{
delay(20);
if (PKEY != 0xf0)
{
temp0 = PKEY;
PKEY = 0x0f;
if (PKEY != 0x0f)
{
temp1 = PKEY;
}
temp = temp0 + temp1;
if (temp == 0xee) { num = 1; }
else if (temp == 0xed) { num = 2; }
else if (temp == 0xeb) { num = 3; }
else if (temp == 0xe7) { num = 12; }
else if (temp == 0xde) { num = 4; }
else if (temp == 0xdd) { num = 5; }
else if (temp == 0xdb) { num = 6; }
else if (temp == 0xd7) { num = 13; }
else if (temp == 0xbe) { num = 7; }
else if (temp == 0xbd) { num = 8; }
else if (temp == 0xbb) { num = 9; }
else if (temp == 0xb7) { num = 14; }
else if (temp == 0x7e) { num = 10; }
else if (temp == 0x7d) { num = 0; }
else if (temp == 0x7b) { num = 11; }
else if (temp == 0x77) { num = 15; }
if (num == 0 || num == 1 || num == 2 || num == 3 || num == 4 || num == 5 || num == 6 || num == 7 || num == 8 || num == 9)
keyswitch = 1;
if (num == 10)
tuiwei = 1;
while ((a < 50) && (PKEY != 0x0f))
{
delay(10);
a++;
}
}
}
}
void smg() //數碼管顯示函數
{
LSA = 1; LSB = 1; LSC = 1;
PDIG = smgnum[box[0]];
delay(1); PDIG = 0x00;
LSA = 0; LSB = 1; LSC = 1;
PDIG = smgnum[box[1]];
delay(1); PDIG = 0x00;
LSA = 1; LSB = 0; LSC = 1;
PDIG = smgnum[box[2]];
delay(1); PDIG = 0x00;
LSA = 0; LSB = 0; LSC = 1;
PDIG = smgnum[box[3]];
delay(1); PDIG = 0x00;
LSA = 1; LSB = 1; LSC = 0;
PDIG = smgnum[box[4]];
delay(1); PDIG = 0x00;
LSA = 0; LSB = 1; LSC = 0;
PDIG = smgnum[box[5]];
delay(1); PDIG = 0x00;
LSA = 1; LSB = 0; LSC = 0;
PDIG = smgnum[box[6]];
delay(1); PDIG = 0x00;
LSA = 0; LSB = 0; LSC = 0;
PDIG = smgnum[box[7]];
delay(1); PDIG = 0x00;
}
void main() //主函數
{
int0_init();
while (1)
{
smg();
key_scan();
if (num == 12) //按鍵控制直流電機正轉
{
x = 1;
y = 0;
}
if (x == 1)
{
kaishi();
if ((box[7] == 0) && (box[6] == 0) && (box[5] == 0) && (box[4] == 0))
{
kaishi();
}
else
{
if ((box[3] == box[7]) && (box[2] == box[6]) && (box[1] == box[5]) && (box[0] == box[4]))
{
num = 13;
}
}
}
if (num == 14) //按鍵控制直流電機倒轉
{
y = 1;
x = 0;
}
if (y == 1)
daofang();
if ((box[7] == 0) && (box[6] == 0) && (box[5] == 0) && (box[4] == 0))
{
daofang();
}
else
{
if ((box[3] == box[7]) && (box[2] == box[6]) && (box[1] == box[5]) && (box[0] == box[4]))
{
num = 13;
}
}
}
if (num == 13) //按鍵控制直流電機停止
{
E = 1;
IN0 = 1;
IN1 = 1;
x = 0;
y = 0;
num = 99;
}
if ((keyswitch == 1) && (wei < 4)) //預設數值輸入
{
for (i = 7; i > 4; i--)
{ box[i] = box[i - 1]; }
box[4] = num;
keyswitch = 0;
wei++;
}
if (num == 11) //預設數值清零
{
for (i = 4; i < 8; i++)
{
box[i] = 0;
}
wei = 0;
}
if (num == 15) //計數數值清零
{
gd = 0;
num = 99;
}
if (tuiwei == 1) //預設數值退位
{
box[4] = box[5];
box[5] = box[6];
box[6] = box[7];
box[7] = 0;
if (wei > 0)
wei--;
tuiwei = 0;
}
box[0] = gd % 10;
box[1] = gd / 10 % 10;
box[2] = gd / 100 % 10;
box[3] = gd / 1000 % 10;
}
}
void int0() interrupt 0 //中斷函數
{
gd++;
delay(200);
}

復制代碼

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