This article is in continuation to the article Single character LCD display using AVR. The aforesaid article shows how to display a single letter on LCD. Moving forward towards learning to work with LCD, this article explains how to display a string on LCD. Displaying string is occasionally used in many applications.
The connection of the LCD with the AVR microcontroller (ATmega16) is shown in the circuit diagram. A string is nothing but a sequence of characters. The following steps explain how to display a string on the LCD.
To send string on LCD:
i. Make a string pointer variable
ii. Pass the starting address of string to that pointer variable
iii. Pass the string pointer value to the LCD_write function
iv. Increment the pointer value and go to step (iii.) till the value of pointer reaches NULL character.
void LCD_write_string(unsigned char *str) //store address value of the string in pointer *str
{
int i=0;
while(str[i]!=’\0′) // loop will go on till the NULL character in the string
{
LCD_write(str[i]); // sending data on LCD byte by byte
i++;
}
return;
}
For more detail: How to display text on 16×2 LCD using AVR microcontroller (ATmega16)
