LCD Interfacing with PIC 16f877

[Sathiesh Kumar]

Hi,
I am new to microcontroller programming...I would like to interface a LCD with Pic 16f877.. but i think that there is a problem in initializing the LCD...I could not able to initialize the LCD...LCD just displays black boxes...
Compiler:MickroC
ProgrammmerIC start Plus
Programming :C

I can initialize an LCD when i connect it with 89C51...But i cant do the same thing with Pic microcontroller.. What might be the problem?

Whether its the problem due to compiler or code or Programmer..

Can any one help me...

Please...

 

[ronsimpson]

Please post your code. Initialize LCD code and initialize micro IO pins....... It is common to not have the pins right.

 

[birdman0_o]

Is the code yours?
Sounds like a hardware problem to me if its only black boxes (or bad software).

 

[Sathiesh Kumar]

Code for LCD Interfacing with 16f877

Thanks for your reply... I have attached the code which i tested in MicroC compiler... But it shows the black boxes... Help me

Program 1:

#define ldata PORTD
#define rs PORTB.F0
#define rw PORTB.F1
#define en PORTB.F2
void lcdcmd(unsigned char );
void lcddata(unsigned char );
void msdelay(unsigned char);
void main(void)
{
TRISD=0;
TRISB=0;
en=0;
msdelay(25);
lcdcmd(0x38);
msdelay(25);
lcdcmd(0x0E);
msdelay(15);
lcdcmd(0x01);
msdelay(15);
lcdcmd(0x06);
msdelay(15);
lcdcmd(0x86);
msdelay(15);
lcddata('A');
msdelay(15);
lcddata('D');
msdelay(15);
lcddata('E');
}
void lcdcmd(unsigned char value)
{
ldata=value;
rs=0;
rw=0;
en=1;
msdelay(1);
en=0;
}
void lcddata(unsigned char value)
{
ldata=value;
rs=1;
rw=0;
en=1;
msdelay(1);
en=0;
}
void msdelay(unsigned char itime)
{
unsigned char i,j;
for(i=0;i<itime;i++)
for(j=0;j<135;j++);
}


Program 2:This program i downloaded it from net.. This program too gives the same output...

char *text= "EQBYTE for All";
signed char data[12];
int i=0;
void main (){
TRISB = 0; // PORTB is output
Lcd_Init(&PORTB); // Initialize LCD connected to PORTB
while (1) {
Lcd_Cmd(Lcd_CLEAR); // Clear display
Lcd_Cmd(Lcd_CURSOR_OFF); // Turn cursor off
for (i=1;i<11;i++)
{
Delay_ms(200);
IntToStr(i,data); //Numeric to string transform (i to data)
Lcd_out(1,1,"Value="); // Print fixed text to LCD (e.g "Value")
Lcd_out(1,8,data); // Print variable text to LCD, 1st row, 8th column (e.g data)
Delay_ms(200);
}
Lcd_Cmd(Lcd_CLEAR); // Clear display
Lcd_Out(2, 1, text); // Print text to LCD, 2nd row, 1st column
Delay_ms(1200);
}
}

 

[birdman0_o]

How do you know if the chip is running or not?

 

[rajbex]

I suspect the problem is hardware. You can add an additional program to blink a LED at some other port to make sure that the PIC is executing the code. Also, you can try my code written in mikroC for LCD interface, though I wrote for PIC16F628A.

-Raj
Experiments with PIC16F628A

 

[fermat7]

you can find pre-built library for controlling LCD.....
you can use it if u want to check ur LCD!

 

[mahalakshmigitam]

circuit for PIC 16f877a

sir i need acircuit for temperature measurement and control of water

 

[mahalakshmigitam]

sir i need a circuit for temperature measurement and control of water using PIC 16f877a

 

[mahalakshmigitam]

sir plz send me a cicuit regaring PIC 16f877a for temperature measurement and control of water

 

[birdman0_o]

How are you going to control water?

 

[fermat7]

more details !!