stepp_p-11

 #include <LPC21xx.H>


 void clock_wise(void);

 void anti_clock_wise(void);

 

 unsigned long int var1,var2;

 unsigned int i=0,j=0,k=0;


 int main(void)

 {

PINSEL0 = 0x00FFFFFF; //P0.12 to P0.15 GPIo

IO0DIR |= 0x0000F000; //P0.12 to P0.15 output


while(1)

{

for(j=0;j<50;j++)       // 20 times in Clock wise Rotation

clock_wise();

for(k=0;k<65000;k++);   // Delay to show  anti_clock Rotation 

for(j=0;j<50;j++)       // 20 times in  Anti Clock wise Rotation

anti_clock_wise();


for(k=0;k<65000;k++);   // Delay to show clock Rotation 


} // End of while(1)


 } // End of main


 void clock_wise(void)

 {

var1 = 0x00000800;          //For Clockwise

    for(i=0;i<=3;i++)          // for A B C D Stepping

{

var1 = var1<<1;        //For Clockwise

        var2 = ~var1;

        var2 = var2 & 0x0000F000;


IO0PIN = ~var2;

        for(k=0;k<3000;k++); //for step speed variation         

      }


 }


 void anti_clock_wise(void)

 {

var1 = 0x00010000;      //For Anticlockwise

     for(i=0;i<=3;i++)      // for A B C D Stepping

      {

        var1 = var1>>1;      //For Anticlockwise

        var2 = ~var1;

        var2 = var2 & 0x0000F000;


IO0PIN = ~var2;

        for(k=0;k<3000;k++); //for step speed variation 

             

      }

 }

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