Hi,
I’m new to MIOS, but I did have some experience and success with modifying the MB64 code (V0.34 I,think) to better use the 20*4 display I built into my box.
As a way into MIOS programming I thought I would do a similar small project.
I’m having trouble finding the location in the code where the low level interface takes place. ???
Excuse my naivety, but can anyone advise?
thanks for any guidance
Yo duggle, top stuff man, good on you…
I’ll be watching your work very closely, and I’ll be learning from you, but if you need a hand, count me in…
I’m working right now (well I SHOULD be! heheh) but I’ll read the docs and take a look at the new bits in MIOS 1.3 (with it’s new LCD driver stuff) and see if I can help you out soon…
Knowing TK, he’ll have his answer posted before I finish typing this hehehhe
Hi Duggle,
especially based on your (yes, really!) idea with character offsets I integrated a special function into MIOS called “MIOS_LCD_YAddressSet” (see the documentation) - one advantage of this function is that it allows you to shift a 2x16 screen to the middle of a bigger LCD
However, the interface to MIOS functions can be found in mios_vectors.inc, to user functions in user_vectors.inc
A MIOS function can be overloaded by disabling the appr. entry in mios_vectors.inc and by adding a replacement with the same name into the application.
Best Regards, Thorsten.
hi,
Done! Thanks, Thorsten.
For those interested, centering the display (on a 4*20LCD)was done by adding the following lines to main.asm below USER_DISPLAY_Init and above the comment ;;clear the screen
USER_DISPLAY_Init
movlw 0x00+2
movwf MIOS_PARAMETER1
movlw 0x40+2
movwf MIOS_PARAMETER2
movlw 0x14+2
movwf MIOS_PARAMETER3
movlw 0x54+2
call MIOS_LCD_YAddressSet
;; clear the screen
call MIOS_LCD_Clear
You made that look pretty easy 