Key Control Motor display speed

Program flowchart

Code

# Include <reg52.h>
# Define uchar unsigned char
Sbit Dula = P2 ^ 6;
Sbit wela = P2 ^ 7;
Sbit jia_key = P3 ^ 6;
Sbit jian_key = P3 ^ 7;
Sbit zf_key = P3 ^ 5;
Bit Flag = 0;
Uchar num = 0, show_num = 2, maichong = 4, table_begin = 0;
Uchar code Table1 [] = {0x01,0x02,0x04,0x08,0x08,0x04,0x02,0x01 };
Uchar code table [] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79,0x71 };
Void delay (uchar I)
{
Uchar J, K;
For (j = I; j> 0; j --)
For (k = 125; k> 0; k --);
}
Void display ()
{
Dula = 0;
P0 = table [show_num];
Dula = 1;
Dula = 0;
Wela = 0;
P0 = 0xfe;
Wela = 1;
Wela = 0;
Delay (5 );
P0 = table [0];
Dula = 1;
Dula = 0;
P0 = 0xfd;
Wela = 1;
Wela = 0;
Delay (5 );
}
Void key ()
{
If (jia_key = 0)
{
Delay (5 );
If (jia_key = 0)
{
Num ++;
If (num = 4)
Num = 3;
While (jia_key = 0 );
}
}
If (jian_key = 0)
{
Delay (5 );
If (jian_key = 0)
{
If (num! = 0)
Num --;
Else
Num = 0;
While (jian_key = 0 );
}
}
If (zf_key = 0)
{
Delay (5 );
If (zf_key = 0)
{
Flag = ~ Flag;
While (zf_key = 0 );
}
}
}


Void dispose ()
{
Switch (Num)
{
Case 0:
Show_num = 2;
Maichong = 5;
Break;
Case 1:
Show_num = 4;
Maichong = 4;
Break;
Case 2:
Show_num = 6;
Maichong = 6;
Break;
Case 3:
Show_num = 8;
Maichong = 2;
Break;
}
If (flag = 0)
{
Table_begin = 0;
}
Else
Table_begin = 4;
}


Void qudong ()
{
Uchar I, J;
For (j = 0 + table_begin; j <4 + table_begin; j ++)
{
P1 = Table1 [J];
For (I = 0; I <maichong; I ++)
{
Display ();
}
}
}


Void main ()
{
While (1)
{
Key ();
Dispose ();
Qudong ();
}
}

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Key Control Motor display speed