[pedroe]

Michael,

One more question;
The above solution worked fine, but i notice that frequently the pserial communication skips some characters/numbers.
For example, if the master arduino sends 245 through serial, the slave with the shield might only overlay 24 skipping a 5. In the next loop the value is corrected, but after a few seconds it happens again. Per my understanding is a communication problem, and the variable in the slave side actually only gets the value 24 instead of 245.

Do you have any idea about this? Memory again? Sorry to bother.

[pedroe]

Michael,

Reducing to 128×72 WORKED!!! Thank you very much!
You have no idea how many hours i spent trying to solve this problem! Ready for the next one 🙂

[pedroe]

Michael I really appreciate your input! Thank you!

If i apply your suggestion using Serial instead of pserial and removing the TVout and the overlay, it outputs for the Serial monitor the correct values, parsed and in numbers:

char *strings[10];
char *ptr = NULL;

        

void setup()
{
Serial.begin(4800);
}

void loop()
{
  //Reads serial
   if (Serial.available()) {

 static char input[25];
 static uint8_t i;
 char c = Serial.read ();

 if ( c != '\r' && i < 24 ) // assuming "Carriage Return" is chosen in the Serial monitor as the line ending character
   input[i++] = c;
   
 else
 {
   input[i] = '\0';
   i = 0;
    

     //Parsing the input
     byte index = 0;
    ptr = strtok(input, ",");  // takes a list of delimiters
    while(ptr != NULL)
    {
        strings[index] = ptr;
       
        index++;
        ptr = strtok(NULL, ",");  // takes a list of delimiters
        
       // t0=atoi(strings[0]);
      
       // t1=atoi(strings[1]);
      
       // t2=atoi(strings[2]);
      
    }

  String longString = String(strings[0]);
  String intString = String(strings[1]);
  String floatString = String(strings[2]);
    
    

  long int dist = longString.toInt(); // returns long
  int var = (int)intString.toInt(); // returns long, so cast to int
  float rad = floatString.toFloat();

   Serial.println(dist+1);
   Serial.println( var+1);
   Serial.println( rad+1);
 

       
   }//if
 
 }//pserial available

}//loop  

But using pserial and the tvout library with overlay it doesnt work. The overlayd output is:
0
0
0.00

#include <TVout.h>
#include <pollserial.h>
#include <fontALL.h>

TVout TV;
pollserial pserial;

char *strings[10];
char *ptr = NULL;

        

void setup()
{
  TV.begin(PAL,184,72);
  TV.select_font(font6x8);
  initOverlay();
  TV.println("Serial Terminal");
  TV.println("-- Version 0.1 --");
  TV.set_hbi_hook(pserial.begin(4800));
}

void initOverlay() {
  TCCR1A = 0;
  // Enable timer1.  ICES0 is set to 0 for falling edge detection on input capture pin.
  TCCR1B = _BV(CS10);

  // Enable input capture interrupt
  TIMSK1 |= _BV(ICIE1);

  // Enable external interrupt INT0 on pin 2 with falling edge.
  EIMSK = _BV(INT0);
  EICRA = _BV(ISC01);
}

// Required to reset the scan line when the vertical sync occurs
ISR(INT0_vect) {
  display.scanLine = 0;
}

void loop()
{
  //Reads serial
   if (pserial.available()) {

 static char input[25];
 static uint8_t i;
 char c = pserial.read ();

 if ( c != '\r' && i < 24 ) // assuming "Carriage Return" is chosen in the Serial monitor as the line ending character
   input[i++] = c;
   
 else
 {
   input[i] = '\0';
   i = 0;
    

     //Parsing the input
     byte index = 0;
    ptr = strtok(input, ",");  // takes a list of delimiters
    while(ptr != NULL)
    {
        strings[index] = ptr;
       
        index++;
        ptr = strtok(NULL, ",");  // takes a list of delimiters
        
       // t0=atoi(strings[0]);
      
       // t1=atoi(strings[1]);
      
       // t2=atoi(strings[2]);
      
    }

  String longString = String(strings[0]);
  String intString = String(strings[1]);
  String floatString = String(strings[2]);
    
    

  long int dist = longString.toInt(); // returns long
  int var = (int)intString.toInt(); // returns long, so cast to int
  float rad = floatString.toFloat();

   TV.print(0,20, dist);
   TV.print(0,30, var);
   TV.print(0,40, rad);

       
   }//if
 
 }//pserial available

}//loop

• This reply was modified 5 years ago by pedroe.

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