Three blinking

Problem posed

See on a forum:

I want to have three buttons on an pin that control three flashing LEDs.

For a single button, it is described in the examples of use of the soft PWM:

// This program will flash LED_BUILTIN controled by a button on/off

#include <MTobjects.h> // V1.0.6 See http://arduino.dansetrad.fr/en/MTobjects

const uint8_t PIN_BUTTON = A0; // Button wired between A0 and GND


// Fast flashs
MTsoftPWM Flash(LED_BUILTIN, inpulses_width 500000 micro_seconds, periods_width 1000000 micro_seconds, start_with LOW, MT_INFINI, NO_ACTION, MT_OFF);


// Global operation with a on/off button
void flashsOn(void) // Start the flashs
  Flash.start();
}

void flashsOff(void) // Stop the flashs
{
  Flash.stop();
  digitalWrite(LED_BUILTIN, LOW); // We don't know when we stop it
}

MTcheckButton Button(PIN_BUTTON, flashsOn, flashsOff);


void setup(){}

void loop(){}

For three buttons, just copy the code three times! Now if we want the flashes to be synchronous, just when you light one of the LEDs to reset the others if they were flashing:

// See https://forum.arduino.cc/t/faire-clignoter-3-led-avec-3-boutons-poussoirs/1124797

#include "MTobjects.h" // V1.0.6 See http://arduino.dansetrad.fr/en/MTobjects

const byte LED_1 = 2;
const byte LED_2 = 3;
const byte LED_3 = 4;
const byte BUTTON_1 = A0;
const byte BUTTON_2 = A1;
const byte BUTTON_3 = A2;


MTsoftPWM Flash1(LED_1, inpulses_width 500000 micro_seconds, periods_width 1000000 micro_seconds, start_with LOW, MT_INFINI, NO_ACTION, MT_OFF);
MTsoftPWM Flash2(LED_2, inpulses_width 500000 micro_seconds, periods_width 1000000 micro_seconds, start_with LOW, MT_INFINI, NO_ACTION, MT_OFF);
MTsoftPWM Flash3(LED_3, inpulses_width 500000 micro_seconds, periods_width 1000000 micro_seconds, start_with LOW, MT_INFINI, NO_ACTION, MT_OFF);


void flashsOn1(void)
{
  Flash1.start();
  if (Flash2.getActive()) Flash2.start();
  if (Flash3.getActive()) Flash3.start();
}
void flashsOn2(void)
{
  Flash2.start();
  if (Flash1.getActive()) Flash1.start();
  if (Flash3.getActive()) Flash3.start();
}
void flashsOn3(void)
{
  Flash3.start();
  if (Flash1.getActive()) Flash1.start();
  if (Flash2.getActive()) Flash2.start();
}

void flashsOff1(void)
{
  Flash1.stop();
  digitalWrite(LED_1, LOW); // We don't know when we stop it
}
void flashsOff2(void)
{
  Flash2.stop();
  digitalWrite(LED_2, LOW); // We don't know when we stop it
}
void flashsOff3(void)
{
  Flash3.stop();
  digitalWrite(LED_3, LOW); // We don't know when we stop it
}


MTcheckButton Bouton1(BUTTON_1, flashsOn1, flashsOff1);
MTcheckButton Bouton2(BUTTON_2, flashsOn2, flashsOff2);
MTcheckButton Bouton3(BUTTON_3, flashsOn3, flashsOff3);


void setup(){}

void loop(){}