Demystifying The Use of Table Pointer in SPWM Application in Sine Wave Inverter
I have previously written quite a few articles on sinusoidal pulse width modulation (SPWM). I've discussed about how to generate the sine table, how to implement it, how to practically generate the SPWM signals (with example code) and also how to implement feedback with simple sine table manipulation with table pointer instead of complex PID control. All these methods have one thing in common regarding the implementation - use of the sine table and its control with the table pointer. Whether you use or implement feedback or not, the table pointer is used to access and retrieve values from the sine table. Before reading or going through this article, I suggest you go through these first: Tutorial (Click here to open tutorial): Generation and Implementation of Sine Wave Table Article (Click here to open article): Smart Sine – Software to generate sine table Article (Click here to open article): Generation of sine wave using SPWM in PIC16F684 It took quite a while for me to unde...