Understanding C Language version of analogWrite() for the ATmega328P (Arduino Uno)

While analogWrite() can be an easy function to use, it's not easy to initially understand. This stems from a couple of reasons, first, its mis-named in that the function is not doing anything from an analog perspective and second, it uses a concept called pulse-width modulation (PWM), which in itself is difficult to understand.

While the Arduino IDE and software framework is outstanding for quickly developing a working prototype, it does so in a combination of the C++ language and Arduino-only objects. This can become an issue if you are in a college or university oriented environment which expects standards-based C language proficiency. This set of entries for designed for learning how develop embedded ANSI C programs for the AVR family and specifically the ATmega328P (Arduino Uno).

*Developing in C on the AVR ATmega328P: Pages of Significant Interest*
Always shows latest entries on learning how to develop embedded ANSI C programs for the AVR family and specifically the ATmega328P (Arduino Uno), very important to review for new content!

Like all FAQ’s, if you have a question, check here first.

Similar to an FAQ, describes errors found while creating code, best place to check when you have an error you do not understand.

Example code for all of the functions, if you have a problem with a function, review the example!