Arduino ASCOM Focuser Pro2 DIY / Discussion / General Discussion: OLED Screen Updates Change Request

Hello All,

I've added a 2.42" I2C OLED display to my Focuser Pro2 (search E-Bay for "2.42 oled i2c", make sure to get the I2C interface not the SPI). I am using the "Focuserv256_DRV8825_HW203_OLED_RE_F" firmware.

I made a couple of changes to fix a problem and improve display quality.

If "lcdupdateonmove" is enabled, when the number of displayed digits decrease with either of the variables "currentPosition" or "targetPosition" (i.e. 4 digits to 3 digits, 1000 to 999) the least significant digit from the larger number is left as an artifact on the display (going from 1000 to 999 will display 9990). When “displaylcd()” runs it does clear the issue, but the displayed number is incorrect for a short time.

Starting at line 1514 I’ve changed my firmware to this:

    myoled.print("Current Pos =");
    myoled.print(currentPosition);
    myoled.clearToEOL();
    myoled.println();

    myoled.print("Target Pos  =");
    myoled.print(targetPosition);
    myoled.clearToEOL();
    myoled.println();

Using “clearToEOL” removes the artifact.

I’ve used a similar strategy to eliminate screen flicker, caused by clearing the screen and then re-writing it, when running “displaylcd()”.

I made the following changes started at line 1065:

void displaylcd()
{
  char tempString[20];

  // display values

  //Current Pos
  //myoled.clear();
  myoled.home();
  myoled.print("Current Pos =");
  myoled.print(currentPosition);
  myoled.clearToEOL();
  myoled.println();

  //Target Pos
  myoled.print("Target Pos  =");
  myoled.print(targetPosition);
  myoled.clearToEOL();
  myoled.println();

  //coilPwr
  if ( myfocuser.coilPwr )
    myoled.print(coilpwrontxt);
  else
    myoled.print(coilpwrofftxt);

  myoled.clearToEOL();
  myoled.println();

  //ReverseDirection
  if ( myfocuser.ReverseDirection )
    myoled.print(revdirontxt);
  else
    myoled.print(revdirofftxt);

  myoled.clearToEOL();
  myoled.println();

  // stepmode setting
  if ( myfocuser.stepmode == 1 )
    myoled.print("Step Mode   =Full");
  else if ( myfocuser.stepmode == 2 )
    myoled.print("Step Mode   =Half");
  else if ( myfocuser.stepmode == 4 )
    myoled.print("Step Mode   =1/4");
  else if ( myfocuser.stepmode == 8 )
    myoled.print("Step Mode   =1/8");
  else if ( myfocuser.stepmode == 16 )
    myoled.print("Stemo Mode  =1/16");
  else if ( myfocuser.stepmode == 32 )
    myoled.print("Step Mode   =1/32");

  myoled.clearToEOL();
  myoled.println();

  //Temperature
  char tempstr[8];
  if ( myfocuser.tempmode == true )
  {
    // no need to convert, already in C
    dtostrf(ch1tempval, 4, 3, tempstr);
    myoled.print  ("Temperature =");
    myoled.print(tempstr);
    myoled.print(" c");
    myoled.clearToEOL();
    myoled.println();
  }
  else
  {
    // convert to F for display
    float tempvalf;
    tempvalf = (ch1tempval * 1.8) + 32;
    dtostrf(tempvalf, 4, 3, tempstr);
    myoled.print("Temperature =");
    myoled.print(tempstr);
    myoled.print(" f");
    myoled.clearToEOL();
    myoled.println();
  }


  //Motor Speed
  if ( motorSpeed == 0 )
    myoled.print("Motor Speed =Slow");
  else if (motorSpeed == 1 )
    myoled.print("Motor Speed =Med");
  else if ( motorSpeed == 2 )
    myoled.print("Motor Speed =Fast");
    myoled.clearToEOL();
    myoled.println();

  //MaxSteps
  myoled.print("MaxSteps    =");
  ltoa(myfocuser.maxstep, tempString, 10);
  myoled.print(tempString);
  myoled.clearToEOL();
  myoled.println();
}

I hope this has some value and thanks for all the hard work!

OLED Screen Updates Change Request

Version 2 of the myFocuser Project

Forums

Help

OLED Screen Updates Change Request

OLED Screen Updates Change Request

Version 2 of the myFocuser Project

Forums

Help

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OLED Screen Updates Change Request