I read this tutorial, i make it in real "world" it works, but i don't understand how to control the lcd in special, for example i use a 4X20 lcd so i want to write a character to adress xx how i make this thing? and the hex table i don't know his use...
Have a complete study of the tutorials. Just reading tutorial3 maynot perhaps quench your thurst. There a reference was given to another site for downloading data regarding LCD related issues.
yes i read completly tutorial 3 but i don't understand, can you give me a part of a code that wil make what i say above? and the use of the hex table???
The provided Asm does all yours need. For LCD to send charater to a particular address, first send the address commnd with LCD_Cmd, then send character with LCD_char. The LCD Command table show how to setup up an address. Bit 7 must be set to 1 and the remaining bits are the LCD address. General example below.
To put 'A' at adress 00:
MOVLW 0X80
CALL LCD_CMD
MOVLW 'A'
CALL LCD_CHAR