In the “lcd.c” file have to change “PRG_RDB()” to “pgm_read_byte()”, and only “lcd.h” has to be included in the main.c. I corrected it, and now working !

Thansk the example, great work!

#include
#define F_CPU 1000000UL
#include
#include
#define LCD_data PORTB
#define LCD_D7 PORTB // to check the busy state
#define LCD_rs PORTD //portd pin 5 is used to select command or data register
#define LCD_rw PORTD //portd pin 4 is used to indicate read write
#define LCD_en PORTD /portd pin 6 is used to enablehigh to low signal
#define HIGH LCD_en | (0×01 << 6)
#define LOW LCD_en & ~(0×01 << 6)

void LCD_busy(){

LCD_D7 = LCD_D7 | (0×01 << 7); //Make D7th bit of LCD as i/p
LCD_en = LCD_en | (0×01 << 6); //Make port pin as o/p
LCD_rs = LCD_rs & ~(0×01 << 4); //Selected command register
LCD_rw = LCD_rw | (0×01 << 5); //We are reading
while(LCD_D7 & (0×01 <L
_delay_ms(1);
LCD_en = HIGH;
}
}

void LCD_command(unsigned char var){

LCD_data = var; //Function set: 2 Line, 8-bit, 5×7 dots
LCD_rs = LCD_rs & ~(0×01 << 4); //Selected command register
LCD_rw = LCD_rw & ~(0×01 <L
_delay_ms(1);
LCD_en = LOW;
LCD_busy(); //Wait for LCD to process the command
}
// Using the above function is really simple
// var will carry the command for LCD
// e.g.
//
// LCD_command(0×01); which is used to clear lcd

void LCD_init()
{
LCD_command(0×38); //Function set: 2 Line, 8-bit, 5×7 dots

LCD_command(0×0F); //Display on, Curson blinking command

LCD_command(0×01); //Clear LCD

LCD_command(0×06); //Entry mode, auto increment with no shift
}

void LCD_clear() {
LCD_command(0×01);
LCD_busy();
}

void LCD_senddata(unsigned char var)
{
LCD_data = var; //Function set: 2 Line, 8-bit, 5×7 dots
LCD_rs = LCD_rs | (0×01 << 4); //Selected data register
LCD_rw = LCD_rw & ~(0×01 <L
_delay_ms(1);
LCD_en = LOW;
LCD_busy(); //Wait for LCD to process the command
}

// Using the above function is really simple
// we should pass the character to display as argument to function
// e.g.
// LCD_senddata(’A');

main(){
DDRB = 0xff;
DDRD = 0xE0;
LCD_init();
unsigned char ch = ‘A’;
while(1) {
if(ch == ‘Z’) {
ch = ‘A’;
LCD_clear();
}
LCD_senddata(’ch’);
ch++;
_delay_ms(1000);
}
}

Many thanks !
Frank

I have this tested it on my ATtiny2313 but it does not work.

Can you send me the files please?

Sincerely, Ümit.