Interface a Stepper motor and rotate it in a clockwise and anti-clockwise direction
Program:-
#include <LPC21xx.H>
void clock_wise(void);
void anti_clock_wise(void);
unsigned long int var1;
unsigned int i=0,j=0,k=0;
int main(void)
{
PINSEL0 = 0x00000000; //P0.12 to P0.15 GPIo
IO0DIR = 0x0000F000; //P0.12 to P0.15 output
while(1)
{
for(j=0;j<50;j++) // 50 times in Clock wise Rotation(360 degree)
clock_wise();
for(k=0;k<65000;k++); // Delay to show anti_clock Rotation
for(j=0;j<50;j++) // 50 times in Anti Clock wise Rotation(360 degree)
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
IO0PIN = var1;
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
IO0PIN = var1;
for(k=0;k<3000;k++); //for step speed variation
}
}