Method to generate sinewave PWM module with TMR2 at 100 ticks (20uS)

giving 100 possible PWM resolution steps. However sine table goes from

14 to 86 PWM or a total height range of 73 steps. Sine table has 50

entries over one full 1kHz cycle (20uS per entry). Because the PIC and

the sine math table produce a sinewave with good basic shape it can be

easily filtered by a passive RC filter to make a sinewave with xtal locked

freq accuracy and very low sine distortion.

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　Method to generate sinewave　PWM module with TMR2 at 100 ticks (20uS)

　giving 100 possible PWM resolution steps. However sine table goes from

　14　to 86　PWM or a total height range of 73 steps. Sine table has 50

　entries over one full 1kHz cycle (20uS per entry). Because the PIC and

　the sine math table produce a sinewave with good basic shape it can be

　easily filtered by a passive RC filter to make a sinewave with xtal locked

　freq accuracy and very low sine distortion.