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[SOLVED] Problem in LCD 16x2 LCD display with the using of PIC16F1509

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fahad.joharji

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Hi everyone

I have an issue with my PIC16F1509 MUC and 16x2 LCD,when i input the program from MikroC software to my PIC16F1509 the display was like blocks (like the code does not work). However, when I try the same LCD and same code (different pins number ) with PIC16F877A MUC it was work correctly. I am used external oscillator when I use PIC16F877A.

I am using the internal oscillator in PIC16F1509 and I changed the frequency to 8MHz (the default was 500KHz regarding the datasheet) by using this code:
OSCCON=0b01110000;

I am actually tried to make simple LED blinking program on PIC16F1509, and it was work correctly.

Here my code for PIC16F1509 (doesn't work):

Code C - [expand]
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// LCD module connections
sbit LCD_RS at RC1_bit;
sbit LCD_EN at RC2_bit;
sbit LCD_D4 at RC4_bit;
sbit LCD_D5 at RC5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;
 
sbit LCD_RS_Direction at TRISC1_bit;
sbit LCD_EN_Direction at TRISC2_bit;
sbit LCD_D4_Direction at TRISC4_bit;
sbit LCD_D5_Direction at TRISC5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End LCD module connections
 
char txt1[] = "mikroElektronika";
char txt2[] = "EasyPIC6";
char txt3[] = "Lcd4bit";
char txt4[] = "example";
 
char i;                              // Loop variable
 
void Move_Delay() {                  // Function used for text moving
  Delay_ms(500);                     // You can change the moving speed here
}
 
void main(){
  C1ON_bit = 0;                      // Disable comparators
  C2ON_bit = 0;
  OSCCON=0b01110000;                 // To change the internal frequency to 8 MHz
  
  Lcd_Init();                        // Initialize LCD
 
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,6,txt3);                 // Write text in first row
 
  Lcd_Out(2,6,txt4);                 // Write text in second row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
 
  Lcd_Out(1,1,txt1);                 // Write text in first row
  Lcd_Out(2,5,txt2);                 // Write text in second row
 
  Delay_ms(2000);
 
  // Moving text
  for(i=0; i<4; i++) {               // Move text to the right 4 times
    Lcd_Cmd(_LCD_SHIFT_RIGHT);
    Move_Delay();
  }
 
  while(1) {                         // Endless loop
    for(i=0; i<8; i++) {             // Move text to the left 7 times
      Lcd_Cmd(_LCD_SHIFT_LEFT);
      Move_Delay();
    }
 
    for(i=0; i<8; i++) {             // Move text to the right 7 times
      Lcd_Cmd(_LCD_SHIFT_RIGHT);
      Move_Delay();
    }
  }
}



Here my code for PIC16F877A (worked):

Code C - [expand]
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// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
 
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections
 
char txt1[] = "mikroElektronika";
char txt2[] = "EasyPIC6";
char txt3[] = "Lcd4bit";
char txt4[] = "example";
 
char i;                              // Loop variable
 
void Move_Delay() {                  // Function used for text moving
  Delay_ms(500);                     // You can change the moving speed here
}
 
void main(){
 
  Lcd_Init();                        // Initialize LCD
 
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,6,txt3);                 // Write text in first row
 
  Lcd_Out(2,6,txt4);                 // Write text in second row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
 
  Lcd_Out(1,1,txt1);                 // Write text in first row
  Lcd_Out(2,5,txt2);                 // Write text in second row
 
  Delay_ms(2000);
 
  // Moving text
  for(i=0; i<4; i++) {               // Move text to the right 4 times
    Lcd_Cmd(_LCD_SHIFT_RIGHT);
    Move_Delay();
  }
 
  while(1) {                         // Endless loop
    for(i=0; i<8; i++) {             // Move text to the left 7 times
      Lcd_Cmd(_LCD_SHIFT_LEFT);
      Move_Delay();
    }
 
    for(i=0; i<8; i++) {             // Move text to the right 7 times
      Lcd_Cmd(_LCD_SHIFT_RIGHT);
      Move_Delay();
    }
  }
}


I have already checked all the connections several times and it didn't work:-?:-x

Here image for the PIC16F1509 pin out (May help)


Hope someone will help me to solve this

THANKS

- - - Updated - - -

Also can I used ADC pins...... I don't know how to change the pin to general purpose:|
 
Last edited by a moderator:

fahad.joharji said:
Hi everyone

I have an issue with my PIC16F1509 MUC and 16x2 LCD,when i input the program from MikroC software to my PIC16F1509 the display was like blocks (like the code does not work). However, when I try the same LCD and same code (different pins number ) with PIC16F877A MUC it was work correctly. I am used external oscillator when I use PIC16F877A.

I am using the internal oscillator in PIC16F1509 and I changed the frequency to 8MHz (the default was 500KHz regarding the datasheet) by using this code:
OSCCON=0b01110000;

I am actually tried to make simple LED blinking program on PIC16F1509, and it was work correctly.

Here my code for PIC16F1509 (doesn't work):

Code C - [expand]
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// LCD module connections
sbit LCD_RS at RC1_bit;
sbit LCD_EN at RC2_bit;
sbit LCD_D4 at RC4_bit;
sbit LCD_D5 at RC5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;
 
sbit LCD_RS_Direction at TRISC1_bit;
sbit LCD_EN_Direction at TRISC2_bit;
sbit LCD_D4_Direction at TRISC4_bit;
sbit LCD_D5_Direction at TRISC5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End LCD module connections
 
char txt1[] = "mikroElektronika";
char txt2[] = "EasyPIC6";
char txt3[] = "Lcd4bit";
char txt4[] = "example";
 
char i;                              // Loop variable
 
void Move_Delay() {                  // Function used for text moving
  Delay_ms(500);                     // You can change the moving speed here
}
 
void main(){
  C1ON_bit = 0;                      // Disable comparators
  C2ON_bit = 0;
  OSCCON=0b01110000;                 // To change the internal frequency to 8 MHz
  
  Lcd_Init();                        // Initialize LCD
 
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,6,txt3);                 // Write text in first row
 
  Lcd_Out(2,6,txt4);                 // Write text in second row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
 
  Lcd_Out(1,1,txt1);                 // Write text in first row
  Lcd_Out(2,5,txt2);                 // Write text in second row
 
  Delay_ms(2000);
 
  // Moving text
  for(i=0; i<4; i++) {               // Move text to the right 4 times
    Lcd_Cmd(_LCD_SHIFT_RIGHT);
    Move_Delay();
  }
 
  while(1) {                         // Endless loop
    for(i=0; i<8; i++) {             // Move text to the left 7 times
      Lcd_Cmd(_LCD_SHIFT_LEFT);
      Move_Delay();
    }
 
    for(i=0; i<8; i++) {             // Move text to the right 7 times
      Lcd_Cmd(_LCD_SHIFT_RIGHT);
      Move_Delay();
    }
  }
}



Here my code for PIC16F877A (worked):

Code C - [expand]
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// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
 
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections
 
char txt1[] = "mikroElektronika";
char txt2[] = "EasyPIC6";
char txt3[] = "Lcd4bit";
char txt4[] = "example";
 
char i;                              // Loop variable
 
void Move_Delay() {                  // Function used for text moving
  Delay_ms(500);                     // You can change the moving speed here
}
 
void main(){
 
  Lcd_Init();                        // Initialize LCD
 
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,6,txt3);                 // Write text in first row
 
  Lcd_Out(2,6,txt4);                 // Write text in second row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
 
  Lcd_Out(1,1,txt1);                 // Write text in first row
  Lcd_Out(2,5,txt2);                 // Write text in second row
 
  Delay_ms(2000);
 
  // Moving text
  for(i=0; i<4; i++) {               // Move text to the right 4 times
    Lcd_Cmd(_LCD_SHIFT_RIGHT);
    Move_Delay();
  }
 
  while(1) {                         // Endless loop
    for(i=0; i<8; i++) {             // Move text to the left 7 times
      Lcd_Cmd(_LCD_SHIFT_LEFT);
      Move_Delay();
    }
 
    for(i=0; i<8; i++) {             // Move text to the right 7 times
      Lcd_Cmd(_LCD_SHIFT_RIGHT);
      Move_Delay();
    }
  }
}


I have already checked all the connections several times and it didn't work:-?:-x

Here image for the PIC16F1509 pin out (May help)


Hope someone will help me to solve this

THANKS

- - - Updated - - -

Also can I used ADC pins...... I don't know how to change the pin to general purpose:|
Click to expand...

Please insert the following lines at the beginning of "void main()" in your code for PIC16F1509:
ANSELB = 0;
ANSELC = 0;

Build the project
 
Thank you now it is worked correctly. I was need only to change the analogue pins to digital.:grin::thumbsup:
 

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