[charrisTTI]

First to clarify: Math functions in the C library work with radians, not degrees.

Here is excerpt from MPLAB C18 libraries manual:

tan
Function: Compute the tangent.
Include: math.h
Prototype: float tan( float x );
Remarks: Computes the tangent of x (in radians). A domain error occurs if the
argument is infinite or NaN. Both cases return NaN.
Return Value: The tangent of x.
File Name: tan.c


Attached is spread sheet for calculating a look-up table. Copy and paste the data from the Range Text column to create your array. See rangelu.c for example of completed array.

When you need to use the array declare as extern in that file.

extern const rom unsigned short targetRange[];


If you use Kevin's changes to increase resolution on the tilt axis. The number of table entries will need to increase and the PWM TO DEGREES factor will need to be changed.