Sleep mode problem via digital pin 9 arduino mega 2560

Projects General Guidance
1

hi guys i have some problem
in my project(ardunio mega) sleep mode and wake up not worked via digital pin 1 or 9 i testet and sleep and wake up worked only via digital pin 52

i need use pin 9 from SET sleep mode
digital pin 9 is healthy
please help me for use pin 9 from sleep mode

void loop()
{// When the ignition switch is turned, executes the next two ifs 
if (ignition == true && digitalRead(9) == LOW) 
{ 

  ignition = false; 



display.ssd1306_command(SSD1306_DISPLAYOFF); 
  
  sleep_enable(); // enables the sleep mode
  set_sleep_mode(SLEEP_MODE_PWR_DOWN); // set the sleep mode
  cli();
  sleep_disable(); // disables the brown out detector to consume less power while sleeping
  sei();
  sleep_mode(); // microcontroller goes to sleep  
if (ignition == true && digitalRead(9) == HIGH) 
{ 
  ignition = false;    // this variable is needed in order to run once the code inside this if
  logohold = millis(); // hold the LOGO screen on, for 2 sec
  inst_disp = true;
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);           
  display.clearDisplay();                              
  display.drawBitmap(0, 0,  logo, 128, 64, WHITE);     
  display.display();                                   


  while (millis() - logohold < 2000) ;


void ignitionSignal() // this is called everytime the ingintion signal changes -- if the 
microcontroller is in sleep mode, it will wake up
{
  ignition = !ignition;
 }
2

Post complete code! The error is most probably in that part of the code you're hiding from us.

3

You definetly need to post the complete code.

Did you check the Mega pin out diagram, does pin 9 support interrupts and wake up from sleep ?

4

OK
i uploaded my project sketchMY PROJECT.ino (7.7 KB)

5

i uploaded my sketch
i know in ardunio uno mega2560 digital pin 2 and 3 supported interrupt
i uploaded my sketch to ardunio uno and wakeup and sleep mode worked via digital pin 9 but via ardunio mega not working via pin 9 why ?

6

Sigh ............. did you carry out the check suggested in post #3 ?

Does pin 9 on a Mega support interrupts ?

A clue; to wake up a processor from sleep, you need to use a pin that supports interrupts .....................

7

I researched this

in ARDUNIO uno & mega2560 Pin 9 has no interruptŲŒBut I solved this problem with this command

attachPCINT(digitalPinToPinChangeInterrupt(ignition_pin), ignitionSignal, CHANGE);

8

i posted my sketch

9

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