PulsePattern

Arduino Library to generate repeating pulse patterns AVR ONLY

Description

This is an experimental library to generate pulse patterns by means of an Arduino UNO. As the library uses AVR hardware timers it is definitely NOT working for ESP or other non-AVR processors.

The library uses timer1 for the timing of the pulses. Therefor the class is implemented with a static instance called PPO. Still by calling init() one can change all parameters of the process. One should note that calling init() forces the timer to stop.

The timer code is based upon the website of Nick Gammon which holds quite a lot of good solid material (Thanks Nick!). https://gammon.com.au/forum/bbshowpost.php?bbtopic_id=123

Use with care.

Interface

PulsePattern() constructor
init(pin, *ar, size, level, prescaler) initializer of the Timer1
- pin that outputs the pattern
- array of durations
- size (or part) of the array to be used
- starting level HIGH/LOW
- prescaler, one of the 5 defines from .h file (table below)
setFactor(perc) percentage = factor to correct timing (relative).
getFactor() get the internal used factor. Due to rounding it can be slightly different.
stop() stop the pattern generator
start() start the pattern generator
cont() continue the pattern generator from the last stopped place (approx).
isRunning() status indicator
worker() must be public otherwise the ISR cannot call it.

There is some bad understood __vector_11() error when worker() is private.

Prescaler constants

Value	Prescaler	Timer1	notes
0	NO_CLOCK	timer off
1	PRESCALE_1	clk / 1
2	PRESCALE_8	clk / 8
3	PRESCALE_64	clk / 64
4	PRESCALE_256	clk / 250
5	PRESCALE_1024	clk / 1024	about 1 ms / pulse
6	EXT_T1_FALLING	T1 = pin 5	not tested
7	EXT_T2_RISING		not tested

Future

ESP32 variant of this class (baseclass -> AVR -> ESP class)
pulse recorder class to record / generate patterns

if time permits ...

Operation

See example

2.6 KiB Raw Blame History