arduino single signal digital

Question

I ask for help I'm not good at Arduino
I need to send a single signal to the outputs only without delay. oscillogram attached time. signal for a certain time high then low then high again. thanks for the help. second signal high then low to the end. thank you

javagoza · Accepted Answer

Can this help? #define SIGNAL1_PIN 5
#define SIGNAL2_PIN 8
#define SIGNAL1_PULSE_LENGTH_MS 2000
#define SIGNAL2_START_DELAY_MS 500

void setup() {
pinMode(SIGNAL1_PIN, OUTPUT);
pinMode(SIGNAL2_PIN, OUTPUT);
digitalWrite(SIGNAL1_PIN, HIGH);
digitalWrite(SIGNAL2_PIN, HIGH);
}

void pulseS1LowS2() {
digitalWrite(SIGNAL1_PIN, LOW);
delay(SIGNAL2_START_DELAY_MS);
digitalWrite(SIGNAL2_PIN, LOW);
delay(SIGNAL1_PULSE_LENGTH_MS - SIGNAL2_START_DELAY_MS);
digitalWrite(SIGNAL1_PIN, HIGH);
}

void loop() {
 // call pulseS1LowS2() when needed
}

balexfox · Answer

delay is not suitable because it slows down the code and I have a lot of it. Here's an example I don't know how to fix it. unsigned long currentMillis = millis(); unsigned long currentMillis2 = millis(); // These variables store the flash pattern // and the current state of the LED int ledPin = 13; int ledPin2 = 12;// the number of the LED pin int ledState = LOW; int ledState2 = LOW; // ledState used to set the LED unsigned long previousMillis = 0; unsigned long previousMillis2 = 0;// will store last time LED was updated long OnTime = 100; long OnTime2 = 50;// milliseconds of on-time long OffTime = 7000; long OffTime2 = 5000;// milliseconds of off-time void setup() { // set the digital pin as output: pinMode(ledPin, OUTPUT); pinMode(ledPin2, OUTPUT); } void loop() { // check to see if it's time to change the state of the LED unsigned long currentMillis = millis(); unsigned long currentMillis2 = millis(); if((ledState == LOW) && (currentMillis - previousMillis >= OnTime)) { ledState = HIGH; // Turn it off previousMillis = currentMillis; // Remember the time digitalWrite(ledPin, ledState); // Update the actual LED } else if ((ledState == HIGH) && (currentMillis - previousMillis >= OffTime)) { ledState = HIGH; // turn it on previousMillis = currentMillis; // Remember the time digitalWrite(ledPin, ledState); // Update the actual LED } // second signal if((ledState2 == LOW) && (currentMillis2 - previousMillis2 >= OnTime2)) { ledState2 = HIGH; // Turn it off previousMillis2 = currentMillis2; // Remember the time digitalWrite(ledPin2, ledState2); // Update the actual LED } else if ((ledState2 == HIGH) && (currentMillis2 - previousMillis2 >= OffTime2)) { ledState2 = LOW; // turn it on previousMillis2 = currentMillis2; // Remember the time digitalWrite(ledPin2, ledState2); // Update the actual LED } }

javagoza · Answer

I'm glad you've solved!

if later you need to do things while waiting to change state, then instead of using blocking delays you can use timers or any library for no-blocking delays:

GitHub - contrem/arduino-timer: Non-blocking library for delaying function calls

or

How to code Timers and Delays in Arduino (forward.com.au)

arduino single signal digital

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