Problem with GLCD for MidiboxLC on PIC18F4620 with MIOS 1.9g

Pearl · February 23, 2013, 5:06pm

Hello,

I’m trying to run upgrade MidiBoxLC v1.6e on a PIC18F4620 with MIOS v1.9g.
But after many ours of struggling, searching the forum for answers and testing some settings, I didn’t find a way to get the glcd running.

If I compile and upload the hex file, it looks like as if the ram for the fonts was overwritten (there is only rubbish at glcd).

MIOS Studio says:
     Reading setup_midibox_unit0.hex
     Trying to contact the core…
      setup_midibox_unit0.hex contains 18860 bytes (75 blocks).
      Range 0x00003000-0x00007aff (19200 bytes) - PIC Flash
      Upload of 19200 bytes completed after 11.37s (1.65 kb/s)

So, it shows that area 07cfc-07fff (where MIOS font is stored) is not affected.

I can upload app Mios example app lcd7/ks0108 and I get the correct welcome screen. So this works.
I can upload my compiled MidiBoxLC and pushing buttons or touching faders are producing midi events I can see in MIOS Studio.

Things I’ve done and/or tried:

copied app_lcd.asm /.ins/.lcd from projekt lcd7/ks0108 into MidiboxLC folder modules/app_lcd/dummy/
In Makefile.org: set PIC to 18F4620
I also tried to edit file p18f4620.lkr in MIOS_Base/etc/lkr to split memory page as shown in http://www.midibox.org/dokuwiki/doku.php?id=using_pic18f4620 but this doesn’t work for me.

And now I need an idea which setting I am missing …

Thanks for any advice,

Stefan

T.K · February 23, 2013, 6:30pm

Hi Stefan,

the KS0108 GLCD driver is already part of MIOS, the “official way” to select this driver would be through the PIC ID header as explained here: http://www.ucapps.de/mios_bootstrap_experts.html

Considered, that this requires a PIC programmer (or a modified change_id application), I propose you an alternative way:

you could select the GLCD type in the application as well.

Just add following lines at the beginning of USER_Init in main.inc:

USER_Init

    ;; select LCD type #1 (KS0108)
    movlw 0x00 ; if 0: non-inverted CS, if 1: inverted CS#
    movwf MIOS_PARAMETER1
    movlw 0x00 ; here you could forward an additional parameter
    movwf MIOS_PARAMETER2
    movlw 0x01
    call MIOS_LCD_TypeSet

Best Regards, Thorsten.

Pearl · February 23, 2013, 7:51pm

Yeaahhhh,
I can see now the initial Text "Logic control emulation ready. … " (it is still in wrong format: there are some additional spaces between (see picture), but that I will check tomorrow)

Thanks
Stefan

T.K · February 23, 2013, 8:08pm

This would be the text output to CLCDs - strange!

What happens if you add:

bsf MIOS_BOX_CFG0, MIOS_BOX_CFG0_USE_GLCD

after “call MIOS_LCD_TypeSet”?

Best Regards, Thorsten.

Pearl · February 23, 2013, 8:44pm

That’s it

Thanks for all the cool stuff…

… and a nice weekend!

Stefan

T.K · February 24, 2013, 9:33pm

Cool!

Could you please do me a favor and test following version at your side:

http://www.ucapps.de/mios/midibox_lc_v1_6f.zip

In main.inc, USER_Init you only have to change the #if 0 by a #if 1 to enable KS0108 without programming the PIC ID Header

The GLCD view should be enabled by the MIOS_LCD_Init call in the middle of USER_Init (hopefully)

Best Regards, Thorsten.

Pearl · February 25, 2013, 9:26pm

Hi,

this is not so easy because I have a lot of customization in sourcecode.

(I have 3 MidiBoxLC units in one device each with a special configuration and some extra pin mappings and so on)

But, of course I can try to compare/merge your changes from version 1.6f to give you some feedback.
(I think I need some days, looks like a busy week, but I will post if I’m ready)

Buy Stefan

Pearl · February 27, 2013, 8:50pm

Hi,
ok, I merged your changes from main.inc into my code, but for me this doesn’t work!
After uploading and while rebooting the GLCD shows “Rebooting MIOS”, but doesn’t switch to “MIOS v. 1.9g” and shows only some additional random rubbish later.
After switch off and on again - GLCD is complete blank.

My code in main.inc:

USER_Init

    ;; select LCD type #1 (KS0108)
    movlw 0x00 ; if 0: non-inverted CS, if 1: inverted CS#
    movwf MIOS_PARAMETER1
    movlw 0x00 ; here you could forward an additional parameter
    movwf MIOS_PARAMETER2
    movlw 0x01
    call MIOS_LCD_TypeSet

	bsf MIOS_BOX_CFG0, MIOS_BOX_CFG0_USE_GLCD

...

Hope that helps,
Stefan

T.K · March 10, 2013, 9:42pm

Hi Stefan,

I’ve no explanation for this wrong behaviour.

And my big problem: the only KS0108 GLCD that I own is currently connected to a MBHP_CORE_STM32 module, so that I can’t test the changes. :-/

However, it sounds like the CLCD variant was connected (again), therefore I reverted the changes (MIOS_LCD_Init not called anymore before testing the GLCD flag).

http://www.ucapps.de/mios/midibox_lc_v1_6g.zip

It would be helpful if you could test the change at your side (again).

Only main.inc, USER_Init has been changed:

call MIOS_LCD_Init removed
default check for GLCD flag now based on type number
you’ve to turn “#if 0” to “#if 1” to overrule the PIC ID header selection

Best Regards, Thorsten.