NE555

Simulation of the function from a NE555 timer chip. ;)

• State change with defined interval time, without stopping the loop() like Delay().
• State changes calls a defined callback function it used.
• Enable allow to freeze and resume the timer.
• High and low state timing are independent.

MODE

PULSE

Mode pulse can also by flash.

DELAY

Delay fires the callback function only ones.

INSTALLATION & DOWNLOAD

Install via the Arduino Library Manager, the PlatformIO Library Manager or download from github

BASIC USAGE

INSTANTIATE

#include <NE555.h>

#define pinBlink 	13

void BlinkCB( boolean state );

NE555 blink( <highTimer>, <lowTimer>, <Callback> );

// Create callback function
void BlinkCB( boolean state )
{
    digitalWrite( pinBlink, state );
}

SETUP

blink.restart();            // Restart & enable timer.

LOOP

blink.inspect();

Inspect the delayed time and change state if expired and call the callback function if used.

The first call of inspect() fires always the callback function with state by high.

Constructors

For Pulse (blink and flash) or Delay the constructor are the same.

Construct a blink function. (No callback function used)

NE555 blink( 1000 );

Construct a flash function. (No callback function used)

NE555 blink( 100, 900 );

Construct a blink function with callback function.

NE555 blink( 1000, BlinkCB );

Construct a flash function with callback function.

NE555 blink( 100, 900, BlinkCB );

Setup method

Normally called from within setup() but can be updated at runtime.

void enable( boolean enable ) False freeze the timer and resume with true.

boolean enable() Get the enable.

void restart() Restart the timer. State and enable are set to true and on the next inspect() the callback function is called. (Timer are unchanged)

void restart( unsigned long highTimer ) Restart and change the pulse time. (High and low timer are the same and changed)

void restart( unsigned long highTimer, unsigned long lowTimer ) Restart and change the pulse time. (High & low timer are changed)

void delay( unsigned long lowTimer ) Start delay. State is false, enable set to true. After the delay time the callback function is call one time.

Loop method

This is the only method to be call from the loop. void inspect() check the timer, and if it is expired, the callback function is fired.

Callback function

After the interval time is elapsed, the callback function is called.

Format: void cb( boolean state )