My experiement with PIC18F2550 and Character Type LCD, using MikroC Pro for PIC

This weekend i wanted to test a character type LCD library supplied with MikroC Pro for PIC. I ran the LCD code on PIC18F2550 device. I ran my PIC18F2550 Device using internal oscillator. To correctly run PIC on internal oscillator, i selected oscillator to INTOSC:USB+HS or INTOSC:USB+XT from the Project Settings Dialog box (which can be accessed by pressing CTRL+SHIF+E in MikroC). To run the microcontroller on internal 8.000mhz clock i also added following statement to my C code:

OSCCON = 0x70; // configures oscillator divider for 8MHz int. oscillator


Schematics:


Picture of my assembled circuit:


MikroC Project Settings




Source Code:

// 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(250); // You can change the moving speed here
}

void main(){
CMCON = 0x07; // Disable comparators
ADCON1 = 0x0F; // Disable Analog functions
OSCCON = 0x70; // configures oscillator divider for 8MHz int. oscillator

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();
}
}
}


Conclusion: Using MikroC built-in LCD library it is very quick and easy to run character type LCDs.