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#ifndef _STEPPER_H_

#define _STEPPER_H_

#define S_STEP    PD6

#define S_DIR     PD7

#define S_MS      PB7

//define the type func as a pointer to a void function with no parameters

typedef void (*func)();

/*returns a funciton pointer that must be called at regular intervals

* as specified by the call_us argument

*/

func step_init(unsigned int call_us);

void step_dir(int dir);

void step_halfstep();

void step_fullstep();

void step_flush();

void step_sweep_speed(unsigned int speed);

void step_sweep_bounds(int ccw, int cw);

void step_sweep();

#endif