HELP Arduino Sleep/Wake using 2 interrupts

Projects Programming
1

I have gotten the arduino to go into sleep mode via pin 2 change interrupt. My problem is I can't get it to wake up from sleep mode with pin 3 change interrupt. It is such an easy task but my code is not working when trying to wake it up.

#include <avr/interrupt.h>
#include <avr/sleep.h>
//Pin set up
int ledPin =12;
int wakePin = 3;
int sleepPin =2;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  pinMode(sleepPin, INPUT_PULLUP);
  pinMode(wakePin, INPUT_PULLUP );
  attachInterrupt(0, sleepNow, LOW);
  attachInterrupt(1,wakeUpNow,LOW);

 }
 void sleepNow(){
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
  digitalWrite(ledPin, LOW);
  attachInterrupt(1,wakeUpNow,LOW);
  sleep_mode();
  sleep_disable();
  detachInterrupt(1);
  delay(1000);
}

void wakeUpNow(){

}
void loop() {
 digitalWrite(ledPin, HIGH);
 delay(1000);
  digitalWrite (ledPin, LOW);
 delay(1000);

}
2

I feel that there is a problem when you use an interrupt to put the arduino to sleep. If I use a simple switch to put it in sleep mode it wakes up. when I use an interrupt to put it into sleep mode it wont wake up. what is going on here??

3

Anyone?

4

Well in an interrupt routine interrupts are disabled, might have something to do with it.

5

I got it to work by using a boolean and then placing an if statement when true to call sleepmode. Now I want to have the program reset when waken. I got it to wake up using an interrupt anyone know a method to reset the program after it wakes up?
Here is the working code for sleep on interrupt and wake on another interrupt.

#include <avr/interrupt.h>
#include <avr/sleep.h>
//Pin set up
int ledPin =12;
int wakePin = 3;
int sleepPin =2;
volatile boolean flag;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  pinMode(sleepPin, INPUT_PULLUP);
  pinMode(wakePin, INPUT_PULLUP );
  attachInterrupt(0, sleepy, LOW);
  attachInterrupt(1,EMPTY,LOW);
  

}

void EMPTY(){
    detachInterrupt(1);
   
  }
  
void sleepy(){
    flag = true;
  }
  
void sleepNow(){
  
 
  digitalWrite(ledPin, LOW);
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
  attachInterrupt(1,EMPTY,LOW);

  sleep_mode();
  
 
}


void loop() {
  // put your main code here, to run repeatedly:
 // unsigned long startMillis = millis();
//while (millis() - startMillis < 5000);


 digitalWrite(ledPin, HIGH);
 delay(1000);
 digitalWrite (ledPin, LOW);
 delay(1000);
 digitalWrite(ledPin, HIGH);
  delay(1000);

 if (flag){
  sleepNow();
 }
flag = false;
  

}
6

To clarify I want to reset the loop when the interrupt wakes the microcontroller up and not resume where it left off.

7

continue