Displaying on SC204A using PIC16F877A and mikro C as Compiler

[shadow15]

Hello, I want to display a simple text on my SC204A LCD using my PIC16F877A. The compiler I am using is mikro C PRO version 6.0.0. There are no errors when I build my code but I still have no output on my LCD. Here is my code

// LCD module connections
sbit LCD_RS at RB2_bit;
sbit LCD_EN at RB3_bit;
sbit LCD_D4 at RB4_bit;
sbit LCD_D5 at RB5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;

sbit LCD_RS_Direction at TRISB2_bit;
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End LCD module connections

char txt1[] = "This is a Test";
char txt2[] = "Thank you";

void main()
{


PORTB = 0x00;
TRISB = 0x00; // set direction to be output

Lcd_Init(); // Initialize LCD
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Cmd(_LCD_TURN_ON);

Lcd_Out(1,1,txt1); // Write text in first display
Delay_ms(500);
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Out(1,1,txt2); // Write text in next display
Delay_ms(500);
}

Is there a problem with my code? I can't figure out the problem. Kindly help me Thanks!

 

[tpetar]

Remove this part from code:

PORTB = 0x00;
TRISB = 0x00; // set direction to be output

:wink:

 

[jayanth.devarayanadurga]

Is your LCD HD44780 Compatible. If not, it will not work.

 

[tpetar]

Code works ok on HD44780 if he remove part mentioned in post 2.

 

[shadow15]

I tried what you said tpetar. It worked. However, after displaying the text, garbage began displaying on the lcd. Do you know what causes this and how can I remove that?

Here is my circuit by the way.
Is there something wrong with the circuit? Thanks!

 

[jayanth.devarayanadurga]

Connect VDD of LCD to +5V and Vss, RW, D0-D7 pins to GND. Place a ground part in the circuit.

 

[shadow15]

If D0-D7 are connected to the ground, how can I input the message into the LCD?

 

[jayanth.devarayanadurga]

Sorry. It was D0 to D3.

 

[tpetar]

I tried what you said tpetar. It worked. However, after displaying the text, garbage began displaying on the lcd. Do you know what causes this and how can I remove that?
View attachment 91541
Here is my circuit by the way.
Is there something wrong with the circuit? Thanks!

I tryed with PIC18F45K22 and works nice. Check all connection. Try other LCD.

After programming turn off complete device with LCD, then turn on.