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#include<reg52.h>
sbit A1=P1^0;
sbit B1=P1^1;
sbit C1=P1^2;
sbit D1=P1^3;
#define Coil_A1 {A1=1;B1=0;C1=0;D1=0;}
#define Coil_B1 {A1=0;B1=1;C1=0;D1=0;}
#define Coil_C1 {A1=0;B1=0;C1=1;D1=0;}
#define Coil_D1 {A1=0;B1=0;C1=0;D1=1;}
#define Coil_AB1 {A1=1;B1=1;C1=0;D1=0;}
#define Coil_BC1 {A1=0;B1=1;C1=1;D1=0;}
#define Coil_CD1 {A1=0;B1=0;C1=1;D1=1;}
#define Coil_DA1 {A1=1;B1=0;C1=0;D1=1;}
#define Coil_OFF {A1=0;B1=0;C1=0;D1=0;}
unsigned char Speed;
void DelayUs2x(unsigned char t)
{
while(--t);
}
void DelayMs(unsigned char t)
{
while(t--);
}
main()
{
unsigned int i=512;
Speed=8;
Coil_OFF
while(i--)
{
Coil_A1
DelayMs(Speed);
Coil_B1
DelayMs(Speed);
Coil_C1
DelayMs(Speed);
Coil_D1
DelayMs(Speed);
}
Coil_OFF
i=512;
while(i--)
{
Coil_D1
DelayMs(Speed);
Coil_C1
DelayMs(Speed);
Coil_B1
DelayMs(Speed);
Coil_A1
DelayMs(Speed);
}
}
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