[MuIn LCD] problem with clear screen or move cursor with last firmware

[andromeda]

Hi,

there is a problem with command move cursor on arduino mega 2560.

in the section loop i do:

clear screen
move cursor to line 3
and print 20 caractere in the line3

problem => cursor position is after un moment line1, after line 3, after line 1 etc..

may be is a timing problem with move cursor or clear screen because command clear screen position a cursor in line 1, but i have tested whithout clear command only movecursor and the cursor position is line 1,2,3,4 after a moment.

Where is a problem?

video http://www.youtube.com/watch?v=3-csbGejOuY

the code:

int i;

void setup()
{
  Serial2.begin(57600); 
}

void loop()
{
   clear();
   move(3,1);
   for (i = 0; i < 20; i++)
   {
     printchar(4);
     delay(40); 
   }
   
}

void changeBaud()
{
  Serial2.write(0xFE);
  Serial2.write(0x39);
  Serial2.write(0x01); 
  delay(3);
}

void clear()
{
  Serial2.write(0xFE);
  Serial2.write(0x58);
  delay(3);
}

void graphinit()
{
  Serial2.write(0xFE);
  Serial2.write(0x68);
  delay(3);
}

void bargraph(byte col, byte row, byte dir, byte length)
{
  Serial2.write(0xFE);
  Serial2.write(0x7C);
  Serial2.write(col);
  Serial2.write(row);
  Serial2.write(dir);
  Serial2.write(length);
  delay(3);
}

void printmsg(char *msg)
{
  Serial2.print(msg); 
}

void printchar(char c)
{
  Serial2.print(c);
}

void move(byte row, byte col)
{
  Serial2.write(0xFE);
  Serial2.write(0x47);
  Serial2.write(row); 
  Serial2.write(col);
  delay(3);
}

[Astrobeed]

I'm trying your code on Arduino 2009, let you know as soon as possible because you get this problem.

Bye

[andromeda]

i have tested from other code for arduino and movecursor have problem, the parmaters from cursor move are bad when i want to put it at row or col to lcd.

[Astrobeed]

attached the update to version 2.2.4 of the firmware.



I did the test with this sketch, is a bit more complex.

 
void setup()
{
  Serial.begin(19200); 
}
int i;
void loop()
{
   clear();
   for (i = 1; i < 101; i++)
   {
     bargraph(1,4,0,i);
     move(3,i/5);
     if(i>5) printchar(4);
     move(2,10);
     Serial.print(i);
     move(1,5);
     Serial.print(i);
     move(1,15);
     Serial.print(i);
     delay(5); 
   }
}
void changeBaud()
{
  Serial.write(0xFE);
  Serial.write(0x39);
  Serial.write(0x01); 
  delay(3);
}
void clear()
{
  Serial.write(0xFE);
  Serial.write(0x58);
  delay(5);
}
void graphinit()
{
  Serial.write(0xFE);
  Serial.write(0x68);
  delay(3);
}
void bargraph(byte col, byte row, byte dir, byte length)
{
  Serial.write(0xFE);
  Serial.write(0x7C);
  Serial.write(col);
  Serial.write(row);
  Serial.write(dir);
  Serial.write(length);
  delay(5);
}
void printmsg(char *msg)
{
  Serial.print(msg); 
}
void printchar(char c)
{
  Serial.print(c);
}
void move(byte row, byte col)
{
  Serial.write(0xFE);
  Serial.write(0x47);
  Serial.write(row); 
  Serial.write(col);
  delay(3);
}

[andromeda]

Yes, thank you is ok, graph work and move cursor work.