Big Font generation on 16X2 LCD

Mithun_K_Das · Nov 18, 2013

I found some works, they are doing Big Fonts in just a 16X2 LCD. Like this photo:

Can any one tell me how can I do something like this in MicorC? As far I know its all about programming skill. I hope I can do the rest if you can give me clues.

Thanks in advance.

jayanth.devarayanadurga · Nov 18, 2013

In mikroC it is very easy. Use Custom character tool to create custom Characters. In your image '1' is displayed using row1 col1 col2, row2 col1 col2 col3. So you need to make 6 custom charcater array for '1'. Then you just use CustomChar() function to print those 5 custom characters and you will get '1' on the display.

Actually you need only 3 custom characters for '1'.

Mithun_K_Das · Nov 19, 2013

I found this https://www.mikroe.com/forum/viewtopic.php?f=13&t=32369
But none of the code works. Shows error in microC.

embpic · Nov 19, 2013

follow the tutorial
https://www.instructables.com/id/Custom-Large-Font-For-16x2-LCDs/?ALLSTEPS

jayanth.devarayanadurga · Nov 19, 2013

What error are you getting in mikroC?

Mithun_K_Das · Nov 19, 2013

Here is the error:

and the code:

Code:

// LCD module connections
sbit LCD_RS at RC0_bit;
sbit LCD_EN at RC1_bit;
sbit LCD_D4 at RC4_bit;
sbit LCD_D5 at RC5_bit;
sbit LCD_D6 at RC6_bit;
sbit LCD_D7 at RC7_bit;
sbit LCD_RS_Direction at TRISC1_bit;
sbit LCD_EN_Direction at TRISC0_bit;
sbit LCD_D4_Direction at TRISC4_bit;
sbit LCD_D5_Direction at TRISC5_bit;
sbit LCD_D6_Direction at TRISC6_bit;
sbit LCD_D7_Direction at TRISC7_bit;
// End LCD module connections
 char stringOutput[5];
   short i=0;
const char segments[8][8]=
{
  {3,3,3,3,3,3,3,3},      // segmento 0
  {3,3,3,3,3,3,31,31},  // segmento 1
  {31,31,3,3,3,3,3,3},  // segmento 2
  {31,31,3,3,3,3,31,31},// segmento 3
  {31,31,24,24,24,24,31,31},// segmento 4
  {27,27,27,27,27,27,31,31},// segmento 5
  {31,31,27,27,27,27,27,27},// segmento 6
  {31,31,27,27,27,27,31,31} // segmento 7

};

void writeCGRAM() {
  char i,j=0;

  for (i=0; i<=7; i++) {
     LCD_Cmd(64+i*8); //write CGRAM address
     for (j = 0; j<=7; j++) {
        LCD_Chr_Cp(segments[i][j]);
     }
     LCD_Cmd(_LCD_RETURN_HOME);
  }
}
void writeBigChar(short column, char character) {
  switch(character){
    case 0: {
      LCD_Chr(1,column,6);
      LCD_Chr(2,column,5);
      break;
    }
    case 1: {
      LCD_Chr(1,column,0);
      LCD_Chr(2,column,0);
      break;
    }
    case 2: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,4);
      break;
    }
    case 3: {
      LCD_Chr(1,column,3);
      LCD_Chr(2,column,1);
      break;
    }
    case 4: {
      LCD_Chr(1,column,5);
      LCD_Chr(2,column,0);
      break;
    }
    case 5: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,1);
      break;
    }
    case 6: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,5);
      break;
    }
    case 7: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,0);
      break;
    }
    case 8: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,5);
      break;
    }
    case 9: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,1);
      break;
    }
    case 10:{
      LCD_Out(2,column,".");
    }
  }
}
void ASCIItoDec(char *string, short size) {
   short i=0;

   for(i=0; i<=size; i++) {
      if ( (string[i]==46 || (string[i]==0))) {  //dot character
         string[i]=10;
      }
      else if (string[i]!=32){
         string[i] = string[i]-48;
      }
   }
}
void writeBigFloat(short column, float floatNumber) 
{
   

   char size[] = sprintf(stringOutput,"%4.1f",floatNumber);//string generator

   ASCIItoDec(stringOutput,size)
{
   for (i=0; i<=size-1; i++) 
   {
     if(stringOutput[i]!=32) { //Display string generator
       writeBigChar(column,stringOutput[i]);
       if(stringOutput[i]==10) { // dot
       writeBigChar(column,10);
     }
   }
}




void main()
{
  TRISA  = 0xFF;
  Lcd_Init();
  Lcd_Cmd(_LCD_CLEAR);
  Lcd_Cmd(_LCD_CURSOR_OFF);
  writeCGRAM();

  do
  {
     writeBigChar(2,10);
  } while(1);
}

jayanth.devarayanadurga · Nov 19, 2013

Read Help file. I guess sprintf() returns char or int type.

Try these

Code C - [expand]
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char size = sprintf(...
 
int size = sprintf(...

If these doesn't work then define the variables as global and then use it like

Code C - [expand]
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size = sprintf(...

Mithun_K_Das · Nov 19, 2013

Same error bro. Error.

- - - Updated - - -

Code:

// LCD module connections
sbit LCD_RS at RC0_bit;
sbit LCD_EN at RC1_bit;
sbit LCD_D4 at RC4_bit;
sbit LCD_D5 at RC5_bit;
sbit LCD_D6 at RC6_bit;
sbit LCD_D7 at RC7_bit;
sbit LCD_RS_Direction at TRISC1_bit;
sbit LCD_EN_Direction at TRISC0_bit;
sbit LCD_D4_Direction at TRISC4_bit;
sbit LCD_D5_Direction at TRISC5_bit;
sbit LCD_D6_Direction at TRISC6_bit;
sbit LCD_D7_Direction at TRISC7_bit;
// End LCD module connections
 char stringOutput[5];
   short i=0;
const char segments[8][8]=
{
  {3,3,3,3,3,3,3,3},      // segmento 0
  {3,3,3,3,3,3,31,31},  // segmento 1
  {31,31,3,3,3,3,3,3},  // segmento 2
  {31,31,3,3,3,3,31,31},// segmento 3
  {31,31,24,24,24,24,31,31},// segmento 4
  {27,27,27,27,27,27,31,31},// segmento 5
  {31,31,27,27,27,27,27,27},// segmento 6
  {31,31,27,27,27,27,31,31} // segmento 7

};

void writeCGRAM() {
  char i,j=0;

  for (i=0; i<=7; i++) {
     LCD_Cmd(64+i*8); //write CGRAM address
     for (j = 0; j<=7; j++) {
        LCD_Chr_Cp(segments[i][j]);
     }
     LCD_Cmd(_LCD_RETURN_HOME);
  }
}
void writeBigChar(short column, char character) {
  switch(character){
    case 0: {
      LCD_Chr(1,column,6);
      LCD_Chr(2,column,5);
      break;
    }
    case 1: {
      LCD_Chr(1,column,0);
      LCD_Chr(2,column,0);
      break;
    }
    case 2: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,4);
      break;
    }
    case 3: {
      LCD_Chr(1,column,3);
      LCD_Chr(2,column,1);
      break;
    }
    case 4: {
      LCD_Chr(1,column,5);
      LCD_Chr(2,column,0);
      break;
    }
    case 5: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,1);
      break;
    }
    case 6: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,5);
      break;
    }
    case 7: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,0);
      break;
    }
    case 8: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,5);
      break;
    }
    case 9: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,1);
      break;
    }
    case 10:{
      LCD_Out(2,column,".");
    }
  }
}
void ASCIItoDec(char *string, short size) {
   short i=0;

   for(i=0; i<=size; i++) {
      if ( (string[i]==46 || (string[i]==0))) {  //dot character
         string[i]=10;
      }
      else if (string[i]!=32){
         string[i] = string[i]-48;
      }
   }
}
void writeBigFloat(short column, float floatNumber)
{


    char size = sprintf(stringOutput,"%4.1f",floatNumber);//string generator

   ASCIItoDec(stringOutput,size)
{
   for (i=0; i<=size-1; i++)
   {
     if(stringOutput[i]!=32) { //Display string generator
       writeBigChar(column,stringOutput[i]);
       if(stringOutput[i]==10) { // dot
       writeBigChar(column,10);
     }
   }
}




void main()
{
  TRISA  = 0xFF;
  Lcd_Init();
  Lcd_Cmd(_LCD_CLEAR);
  Lcd_Cmd(_LCD_CURSOR_OFF);
  writeCGRAM();

  do
  {
     writeBigChar(2,10);
  } while(1);
}

jayanth.devarayanadurga · Nov 19, 2013

Zip and post the complete mikroC Project files. I will try to compile.

Edit: I don't know whether your code works or not but here is the fixed code which compiles.

Code C - [expand]
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// LCD module connections
sbit LCD_RS at LATC0_bit;
sbit LCD_EN at LATC1_bit;
sbit LCD_D4 at LATC4_bit;
sbit LCD_D5 at LATC5_bit;
sbit LCD_D6 at LATC6_bit;
sbit LCD_D7 at LATC7_bit;
 
sbit LCD_RS_Direction at TRISC0_bit;
sbit LCD_EN_Direction at TRISC1_bit;
sbit LCD_D4_Direction at TRISC4_bit;
sbit LCD_D5_Direction at TRISC5_bit;
sbit LCD_D6_Direction at TRISC6_bit;
sbit LCD_D7_Direction at TRISC7_bit;
// End LCD module connections
 
char stringOutput[5];
short i = 0;
 
const char segments[8][8]=
{
  {3,3,3,3,3,3,3,3},      // segmento 0
  {3,3,3,3,3,3,31,31},  // segmento 1
  {31,31,3,3,3,3,3,3},  // segmento 2
  {31,31,3,3,3,3,31,31},// segmento 3
  {31,31,24,24,24,24,31,31},// segmento 4
  {27,27,27,27,27,27,31,31},// segmento 5
  {31,31,27,27,27,27,27,27},// segmento 6
  {31,31,27,27,27,27,31,31} // segmento 7
 
};
 
void writeCGRAM() {
  char i,j=0;
 
  for (i=0; i<=7; i++) {
     LCD_Cmd(64+i*8); //write CGRAM address
     for (j = 0; j<=7; j++) {
        LCD_Chr_Cp(segments[i][j]);
     }
     LCD_Cmd(_LCD_RETURN_HOME);
  }
}
void writeBigChar(short column, char character) {
  switch(character){
    case 0: {
      LCD_Chr(1,column,6);
      LCD_Chr(2,column,5);
      break;
    }
    case 1: {
      LCD_Chr(1,column,0);
      LCD_Chr(2,column,0);
      break;
    }
    case 2: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,4);
      break;
    }
    case 3: {
      LCD_Chr(1,column,3);
      LCD_Chr(2,column,1);
      break;
    }
    case 4: {
      LCD_Chr(1,column,5);
      LCD_Chr(2,column,0);
      break;
    }
    case 5: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,1);
      break;
    }
    case 6: {
      LCD_Chr(1,column,4);
      LCD_Chr(2,column,5);
      break;
    }
    case 7: {
      LCD_Chr(1,column,2);
      LCD_Chr(2,column,0);
      break;
    }
    case 8: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,5);
      break;
    }
    case 9: {
      LCD_Chr(1,column,7);
      LCD_Chr(2,column,1);
      break;
    }
    case 10:{
      LCD_Out(2,column,".");
    }
  }
}
 
void ASCIItoDec(char *string, char size) {
   short i=0;
 
   for(i=0; i<=size; i++) {
      if ( (string[i]==46 || (string[i]==0))) {  //dot character
         string[i]=10;
      }
      else if (string[i]!=32){
         string[i] = string[i]-48;
      }
   }
}
 
void writeBigFloat(short column, float floatNumber)
{
   char size = sprintf(stringOutput, "%4.1f", floatNumber);//string generator
 
   ASCIItoDec(stringOutput, size);
 
   for (i=0; i<=size-1; i++)
   {
     if(stringOutput[i]!=32) { //Display string generator
       writeBigChar(column,stringOutput[i]);
       if(stringOutput[i]==10) { // dot
       writeBigChar(column,10);
       }
     }
   }
}
 
 
void main()
{
      TRISA = 0xFF;
      TRISC = 0x00;
      PORTC = 0x00;
 
      Lcd_Init();
      Lcd_Cmd(_LCD_CLEAR);
      Lcd_Cmd(_LCD_CURSOR_OFF);
 
      writeCGRAM();
 
      do{
         writeBigChar(2,10);
      } while(1);
}

jayanth.devarayanadurga · Nov 21, 2013

Here is the working LCD Big Font display which I made.

Mithun_K_Das · Nov 21, 2013

Thanks bro, But still I'm having same error as before. Are you using microCpro 5.6.1 as compiler and MCU PIC18F452 as I'm using?

jayanth.devarayanadurga · Nov 21, 2013

i am using mikroC PRO PIC 6.0.1. Here is the screenshot of above posted project.

Mithun_K_Das · Nov 21, 2013

https://www.edaboard.com/attachment.php?attachmentid=98852&stc=1&d=1385055515

Here is the file. I don't know what mistake I'm doing.

jayanth.devarayanadurga · Nov 21, 2013

I need more information. I want to know what characters you have created. Post the screen shot of each pattern that you have created. Without that I can't tell you why it is not working.

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Big Font generation on 16X2 LCD

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