TinySoftPwm library

TinySoftPwm is a library designed to generate PWM signals by software.

Some examples of use cases:

RGB strip LED Controller
DC Motor controller
Digital to Analog converter

Supported Arduinos:

ATtiny85 (Standalone or Digispark) (up to 6 software PWM supported)
ATtiny167 (Digispark pro) (up to 13 software PWM supported)

API/methods:

TinySoftPwm_begin()
TinySoftPwm_analogWrite()
TinySoftPwm_process()

Design considerations:

In order to reduce program and RAM memories, PWM pins shall be declared in the TinySoftPwm.h file. All the required amount of program and RAM memories are allocated at compilation time.

The TinySoftPwm_process() method shall be called periodically:

using micros() in the loop(): in this case, asynchronous programmation shall be used: no call to blocking functions such as delay() is permitted.
or better using periodic interruption.

In order to reduce the memory footprint (programm and RAM), try to use the PWM on pins which are part of the same port: PORTA or PORTB.

Contact

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