How to use the function "DO WHILE"

Community Education
1

Hi everyone
I'm just started to use Arduino and I have some problems with function "Do While". I got some examples in the support page but the error persist .
Basically I'm trying to do a Led matrix change the draw inside during the time without use a CI.
The error that IDE returns to me is described bellow:

Painel_de_sinaliza__o:42: error: expected unqualified-id before 'do'
Painel_de_sinaliza__o:167: error: expected unqualified-id before 'while'
Painel_de_sinaliza__o:293: error: expected unqualified-id before 'while'

Can anyone help me?
Thanks

2

kasakevicius:
Can anyone help me?

Hi- you will need to post the sketch. I'm guessing you have a bracket or a ; missing, but we can't know until we see the code.

Just copy paste it, select, and hit the # icon above the :wink: :sweat_smile: smilies, so that....

the code
looks
{
like this
}
3
4

Okay sorry see the code bellow:

 //Painel de advertência com LED
  int tempo=0;
  const int col13=9;
  const int col3=3;
  const int col4=2;
  const int col10=12;
  const int col6=15;
  const int col11=11;
  const int col15=7;
  const int col16=6;
  const int row9=13;
  const int row14=8;
  const int row8=17;
  const int row12=10;
  const int row1=5;
  const int row7=16;
  const int row2=4;
  const int row5=14;  

  void setup(){

  pinMode (col13, OUTPUT);
  pinMode (col3, OUTPUT);
  pinMode (col4, OUTPUT);
  pinMode (col10, OUTPUT);
  pinMode (col6, OUTPUT);
  pinMode (col11, OUTPUT);
  pinMode (col15, OUTPUT);
  pinMode (col16, OUTPUT);
  pinMode (row9, OUTPUT);
  pinMode (row14, OUTPUT);
  pinMode (row8, OUTPUT);
  pinMode (row12, OUTPUT);
  pinMode (row1, OUTPUT);
  pinMode (row7, OUTPUT);
  pinMode (row2, OUTPUT);
  pinMode (row5, OUTPUT);
  }



do  {


   tempo++
     
   //Linha 1 Estágio 1
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row9, HIGH);
   delay(1);
   digitalWrite(row9, LOW);
   delay(1);
   
   //Linha 2 Estágio 1
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row14, HIGH);
   delay(1);
   digitalWrite(row14, LOW);
   delay(1);
  
   //Linha 3 Estágio 1
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row8, HIGH);
   delay(1);
   digitalWrite(row8, LOW);
   delay(1);
   
   //Linha 4 Estágio 1
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, LOW);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, LOW);
   digitalWrite(col16, HIGH);
   digitalWrite(row12, HIGH);
   delay(1);
   digitalWrite(row12, LOW);
   delay(1);
   
   //Linha 5 Estágio 1
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, LOW);
   digitalWrite(col3, LOW);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, LOW);
   digitalWrite(col16, LOW);
   digitalWrite(row1, HIGH);
   delay(1);
   digitalWrite(row1, LOW);
   delay(1);
   
   //Linha 6 Estágio 1
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row7, HIGH);
   delay(1);
   digitalWrite(row7, LOW);
   delay(1);
   
   //Linha 7 Estágio 1
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row2, HIGH);
   delay(1);
   digitalWrite(row2, LOW);
   delay(1);
   
   //Linha 8 Estágio 1
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row5, HIGH);
   delay(1);
   digitalWrite(row5, LOW);
   delay(1);
 
} while (tempo<63)
  
do
   {
    
      tempo=tempo+1
   //Linha 1 Estágio 2
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row9, HIGH);
   delay(1);
   digitalWrite(row9, LOW);
   delay(1);
   
   //Linha 2 Estágio 2
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row14, HIGH);
   delay(1);
   digitalWrite(row14, LOW);
   delay(1);
  
   //Linha 3 Estágio 2
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, LOW);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, LOW);
   digitalWrite(col16, HIGH);
   digitalWrite(row8, HIGH);
   delay(1);
   digitalWrite(row8, LOW);
   delay(1);
   
   //Linha 4 Estágio 2
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, LOW);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, LOW);
   digitalWrite(row12, LOW);
   delay(1);
   digitalWrite(row12, LOW);
   delay(1);
   
   //Linha 5 Estágio 2
  
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, LOW);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, LOW);
   digitalWrite(row1, HIGH);
   delay(1);
   digitalWrite(row1, LOW);
   delay(1);
   
   //Linha 6 Estágio 2
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, LOW);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, LOW);
   digitalWrite(col16, HIGH);
   digitalWrite(row7, HIGH);
   delay(1);
   digitalWrite(row7, LOW);
   delay(1);
   
   //Linha 7 Estágio 2
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, LOW);
   digitalWrite(col11, LOW);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row2, HIGH);
   delay(1);
   digitalWrite(row2, LOW);
   delay(1);
   
   //Linha 8 Estágio 2
   
   digitalWrite(col6, LOW);
   digitalWrite(col10, LOW);
   digitalWrite(col13, HIGH);
   digitalWrite(col3, HIGH);
   digitalWrite(col4, HIGH);
   digitalWrite(col11, HIGH);
   digitalWrite(col15, HIGH);
   digitalWrite(col16, HIGH);
   digitalWrite(row5, HIGH);
   delay(1);
   digitalWrite(row5, LOW);
   delay(1);
  
    } while (tempo>63)
5

You sketch has no loop(){} section.

This code Bare Minimum doesn't do anything but it's the minimum structure required to compile.

6

Many thanks guys
It solve the problem
cheers

7

You did not mention the language to use Do While.

The language under discussion would implicitly be "Arduino C" for want of a better term, seeing as this is an Arduino forum. It's explicitly "Arduino C" because of this: "I'm just started to use Arduino".

(I use the phrase "Arduino C" to mean C as we write in the Arduino IDE, where there's no main() since that's taken care of behind the scenes, and where there are Arduino specific things like digitalWrite and so on. Not my intention to start a discussion on there being no such thing as "Arduino C"..... )

Moderator edit: Link to spammer redacted. (Nick Gammon)