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Side 3 av 5
C programmet som styrer dette.
Denne listingen gjør at 2 unipolar stepmotorer snurrer noen runder den ene veien, for så å snurre like mange ganger den andre veien. Det kan sikkert med fordel gjøres på en annen måte, men denne har jeg valgt.
Kompileres med gcc -O 2stepmotor.c -o 2stepmotor
Kjøres med kommandoen sudo ./2stepmotor
/****************************************************
* Program som styrer to steppermotorer synkronisert *
* Laget av Jens Christoffersen *
* 2009 *
*****************************************************/
//includes
#include
#include
#include
#include
#include
//definitions
#define base 0x3bc
#define sleeping1 7000 // by changeing this, you change the speed og the motor.
//variables
int x;
main(int argc, char **argv)
{
// get access to the parallel port
if (ioperm(base,1,1))
fprintf(stderr, "Couldn't get the port at %x\n", base), exit(1);
// send low, to all pins
outb(0, base);
// start infinit loop
while (1)
{
// start for - loop
for (x=0;x<48;x++)
{
// start sending high nad low to pins start with all pins to low
outb(0, base);
// send high to pin 2 and 4
outb(5, base);
printf ("Pin \t2 and 4 high and \t3 and 5 low.\n");
usleep(sleeping1);
// send low to all pins
outb(0, base);
printf ("Pin \t2 and 4 low and \t3 and 5 low.\n");
usleep(sleeping1);
// send hig to pin 3 and 5
outb(10, base);
printf ("Pin \t2 and 4 low and \t3 and 5 high .\n");
usleep(sleeping1);
// send low to all pins
outb(0, base);
//send high til pind 2, 3, 4 and 5
outb(15, base);
printf ("Pin \t2 and 4 high and \t3 and 5 high.\n");
usleep(sleeping1);
} // end for loop
// start new for loop
for (x=0;x<48;x++)
{
// do everything again, just the other way around.
outb(0, base);
outb(15, base);
printf ("Pin \t2 and 4 high and \t3 and 5 high.\n");
usleep(sleeping1);
outb(0, base);
outb(10, base);
printf ("Pin \t2 and 4 low and \t3 and 5 high .\n");
usleep(sleeping1);
outb(0, base);
printf ("Pin \t2 and 4 low and \t3 and 5 low.\n");
usleep(sleeping1);
outb(0, base);
outb(5, base);
printf ("Pin \t2 and 4 high and \t3 and 5 low.\n");
usleep(sleeping1);
} // end for loop
} // end infinite loop
// send low to all pins
outb(0, base);
}
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Programmering 
