lcd 4bits

[Guest komodo]

hello everybody,

i've got some lcd (with ks0066 chipset)

How can i adapt this on mios because they are 4 bits models.

Thanks

[moebius]

Does anybody know an elegant way to do this?

MIOS supports 4bit LCD mode on HD44780 controllers, and KS0066 seems to be compatible.

To set data communication in 4 bit mode, you have to override settings made by MIOS_LCD_TypeAutoSet function at startup. This can be done by MIOS_LCD_TypeSet function, read MIOS functions page:

http://www.ucapps.de/mios_fun.html

My uneducated guess:

Appending (quoting MIOS function reference):

       movlw        0x37 | 0x80        ; E1: D.7, 4bit interface

       movwf        MIOS_PARAMETER1

       movlw        0x24 | 0x80        ; E2: C.4, 4bit interface

       movwf        MIOS_PARAMETER2

       movlw        0x00                ; LCD type 0

       call        MIOS_LCD_TypeSet

In main.asm of the application, in "USER_Init" section ,will do ;)

Bye, Moebius

p.s. Be sure to check MIOS function reference for minor hardware changes needed! ;)

[Sephult]

When you get your LCD up and running, you should try the LCD Benchmark application and post your findings. I am interested in what the results are for a 4 bit mode.