Code
#include <LPC17xx.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)
{
LPC_PINCON->PINSEL4 = 0x00000000; //P2.0 to P2.3 GPIO
LPC_GPIO2->FIODIR = 0x0000000F; //P2.0 to P2.3 output
while(1)
{
for(j=0;j<50;j++) //50 times in Clock wise Rotation
clock_wise();
for(k=0;k<50000;k++); //Delay to show anti_clock Rotation
for(j=0;j<50;j++) //50 times in Anti Clock wise Rotation
anti_clock_wise();
for(k=0;k<50000;k++) ; //Delay to show clock Rotation
} //End of while(1)
} //End of main
void clock_wise(void)
{
var1 = 0x00000001; //For Clockwise
for(i=0;i<=3;i++) //for A B C D Stepping
{
LPC_GPIO2->FIOCLR = 0X0000000F;
LPC_GPIO2->FIOSET = var1;
var1 = var1<<1; //For Clockwise
for(k=0;k<15000;k++) ; //for step speed variation
}
}
void anti_clock_wise(void)
{
var1 = 0x0000008; //For Anticlockwise
for(i=0;i<=3;i++) //for A B C D Stepping
{
LPC_GPIO2->FIOCLR = 0X0000000F;
LPC_GPIO2->FIOSET = var1;
var1 = var1>>1; //For Anticlockwise
for(k=0;k<15000;k++); //for step speed variation
}
}
Screenshot
