atan_div.h

TI公司24X系列DSP控制永磁同步电机PMSM

#ifndef _ATAN_DIV_H_
#define _ATAN_DIV_H_

int atan_div(int x, int y);

/*--------------------------------------------------------------------
  Function:      inverse tanget of the divident (x/y) 
                                                                       
  Arguments:     farctional Q15 sine, fractional Q15 cosine
                 min: -1.0   <--> 8000h
                 max: 0.9999 <--> 7FFFh
                                                                       
  Return value:  fractional Q15 angle (-1 .. 0,9999)
                 scaling factor: PI  

  Error:         < 3 LSB  
  ------------------------------------------------------------------*/
#endif