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  1. /*
  2.  * ap_math.h
  3.  *
  4.  *  Created on: 31 Jan 2016
  5.  *      Author: Mike
  6.  */
  7.  
  8. #ifndef INC_AP_MATH_H_
  9. #define INC_AP_MATH_H_
  10.  
  11. #define AP_K 256
  12. #define AP_SCALE(x) ((x)/AP_K)
  13.  
  14. /* the number of steps in 90 degrees */
  15. #define SINE_SCALING 4
  16. #define  SINE_STEPS (90*SINE_SCALING)
  17.  
  18. extern void ap_init(void);
  19.  
  20. extern int ap_sin(int x);
  21. extern int ap_cos(int x);
  22.  
  23.  
  24.  
  25. #endif /* INC_AP_MATH_H_ */
  26.