Hello,
I have been sweeping the forums most of the afternoon making progress on an LCD. I have the pic18f4252 and I am trying to make it work with a 2*16 LCD.
This is a link to the LCD data sheet.
**broken link removed**
I am still new to these electronics projects, but to my understanding it isn't the Hitachi 44780, but very similar. This is a link to the driver spec, KS0066U:
http://www.datasheetcatalog.org/datasheet/SamsungElectronic/mXuuzvr.pdf
I am using Microchip's C18 compiler. I wasn't able to get the contrast working at first, but that is taken care of now. Below is my C code. I think I have initialized the LCD correctly, but I am not very positive. It seems to be fine until I tell it to display something. I am able to move the cursor to a desired place, all over the display, but when I tell it to print (which might not be right way) it just moves the cursor.
This is the code: ( Parts of it are taken from a book "PIC Microcontroller and Embedded Systems" by Mazidi/McKinlay/Causey)
The second to last command, lcddata('H') appears to just move the cursor to the middle. H = 48 hex, and if I use lcdcmd(0x48) it moves to the same place.
Thanks for the help.
-George
I have been sweeping the forums most of the afternoon making progress on an LCD. I have the pic18f4252 and I am trying to make it work with a 2*16 LCD.
This is a link to the LCD data sheet.
**broken link removed**
I am still new to these electronics projects, but to my understanding it isn't the Hitachi 44780, but very similar. This is a link to the driver spec, KS0066U:
http://www.datasheetcatalog.org/datasheet/SamsungElectronic/mXuuzvr.pdf
I am using Microchip's C18 compiler. I wasn't able to get the contrast working at first, but that is taken care of now. Below is my C code. I think I have initialized the LCD correctly, but I am not very positive. It seems to be fine until I tell it to display something. I am able to move the cursor to a desired place, all over the display, but when I tell it to print (which might not be right way) it just moves the cursor.
This is the code: ( Parts of it are taken from a book "PIC Microcontroller and Embedded Systems" by Mazidi/McKinlay/Causey)
Code:
#include <p18cxxx.h>
#define ldata PORTD // PORTD = LCD data pins
#define rs PORTBbits.RB0 //rs = PORTB.0
#define rw PORTBbits.RB1 //rw = PORTB.1
#define en PORTBbits.RB2 //en = PORTB.2
#define busy PORTDbits.RD7 // busy = PORTD.7
#pragma config WDT = OFF
#pragma config LVP = OFF
void MSDelay(unsigned int itime)
{
unsigned int i, j;
for(i = 0; i < itime; i++)
for ( j = 0; j < 135; j++);
}
void lcdcmd(unsigned char value)
{
ldata = value; // put the value on the pins
rs = 0;
rw = 0;
en = 1; // strobe the enable pin
MSDelay(1);
en = 0;
}
void lcddata(unsigned char value)
{
ldata = value; // put the value on the pins
rs = 1;
rw = 0;
en = 1; // strobe the enable pin
MSDelay(1);
en = 0;
}
void main(void)
{
TRISD = 0; // port D as output
TRISB = 0; // port B as output
en = 0; // enable idle low
MSDelay(250);
lcdcmd(0x38); //inti. LCD 2 lines, 5*8 matrix
MSDelay(250);
lcdcmd(0x0f); // set display and cursor visible, and blink
MSDelay(15);
lcdcmd(0x01); // Clear display
MSDelay(100);
lcdcmd(0x06); // set the entry mode / cursor shift
MSDelay(150);
lcddata('H');
MSDelay(250);
}The second to last command, lcddata('H') appears to just move the cursor to the middle. H = 48 hex, and if I use lcdcmd(0x48) it moves to the same place.
Thanks for the help.
-George