Register forum user name Search FAQ

Gammon Forum

Notice: Any messages purporting to come from this site telling you that your password has expired, or that you need to verify your details, confirm your email, resolve issues, making threats, or asking for money, are spam. We do not email users with any such messages. If you have lost your password you can obtain a new one by using the password reset link.

Due to spam on this forum, all posts now need moderator approval.

 Entire forum ➜ Forum ➜ Problems ➜ rs485

rs485

It is now over 60 days since the last post. This thread is closed.     Refresh page


Posted by Mirkoelettronics   (1 post)  Bio
Date Thu 01 Oct 2015 08:20 AM (UTC)

Amended on Thu 01 Oct 2015 08:32 AM (UTC) by Mirkoelettronics

Message
hello, I tried to use the code rolling master tutorial on ommunication RS485 but communication is unique between two devices.
I tried to differentiate the codes, in id 0:

 // make our LED match the switch of the previous device in sequence
  if (message.address == (myAddress - 1))
    
   
    digitalWrite (LED_PIN11, message.switches [2]); // not run, or not recive**********************

  digitalWrite (OK_PIN, LOW);
  } // end of processMessage

// Here to send our own message
void sendMessage ()
  {
  digitalWrite (SEND_PIN, HIGH);
  memset (&message, 0, sizeof message);
  message.address = myAddress;

  // fill in other stuff here (eg. switch positions, analog reads, etc.)

  message.switches [0] = digitalRead (SWITCH_PINa0); // t's ok  *******
  message.switches [3] = digitalRead (SWITCH_PINa1); // t's ok ********


and id 1:


 // make our LED match the switch of the previous device in sequence
  if (message.address == (myAddress - 1))
    digitalWrite (LED_PIN13, message.switches [3]); // ok  to recive ****************
    digitalWrite (LED_PIN12, message.switches [0]); // ok to recive ****************
    

  digitalWrite (OK_PIN, LOW);
  } // end of processMessage

// Here to send our own message
void sendMessage ()
  {
  digitalWrite (SEND_PIN, HIGH);
  memset (&message, 0, sizeof message);
  message.address = myAddress;

  // fill in other stuff here (eg. switch positions, analog reads, etc.)

 
 
  message.switches [2] = digitalRead (SWITCH_PINa2); // no send this message *****************************************




Top

Posted by Nick Gammon   Australia  (23,165 posts)  Bio   Forum Administrator
Date Reply #1 on Thu 01 Oct 2015 08:53 AM (UTC)
Message
Template:Arduino Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
Top

The dates and times for posts above are shown in Universal Co-ordinated Time (UTC).

To show them in your local time you can join the forum, and then set the 'time correction' field in your profile to the number of hours difference between your location and UTC time.


14,056 views.

It is now over 60 days since the last post. This thread is closed.     Refresh page

Go to topic:           Search the forum


[Go to top] top

Information and images on this site are licensed under the Creative Commons Attribution 3.0 Australia License unless stated otherwise.