d2k Posted March 17, 2003 Report Posted March 17, 2003 Hi...I've started putting the parts for my LC box together - including the Graphics LCD which is the Displaytech 64240A. I followed the hookup diagram in the LCD section of the site and when i apply power to the core it powers up fine and the pots work as expected (lum (pot on core) and con(additional pot wired in)). However, after burning the bootstrapper to the pic, and then mios via syx, I dont get the MIOS welcome msg on the LCD like i've done with the character LCD used on the 18F Sid i started. I put the appropriate ID Value in ICProg for the KS controller before burning the bootstrapper (0000000000001000)...After sending mios and applying power i get:F0 00 00F0 7E 40F0 00 01F0 F7 00but it doesnt repeat every 2 secs, so that makes me think that mios sysxed correctly and so should display the MIOS screen...but it aint :/ it just stays filled black as before...Have i missed summin? Quote
TK. Posted March 17, 2003 Report Posted March 17, 2003 Hi Dan,important question: did you wire the graphical LCD based on the updated schematic? Because I changed one connection before the final MIOS release.A simple way to test if the ID has been set correctly is the use of the (undocumented *sigh*) debug message which allows you to call a MIOS function from external.So, when you send:F0 00 00 7E 40 00 0D 01 00 5A 44 00 00 00 00 00 00 00 00 F7 the "MIOS_LCD_TypeGet" function will be executed. The return parameters will be sent back by the MIDIbox:F0 00 00 7E 40 00 0F 00 00 00 00 00 00 00 00 F7 if a character LCD has been initializedF0 00 00 7E 40 00 0F 00 01 00 01 00 00 00 00 F7 if a graphical LCD has been initialized.It's also possible to setup a graphical display after startup by modifiying the init function in lc_init.incJust add:     movlw  0x01     call   MIOS_LCD_TypeSet at the beginningBest Regards, Thorsten. Quote
d2k Posted March 18, 2003 Author Report Posted March 18, 2003 Hi T...Okay, so i sent that syx cmd and got this feed back:F0 00 00 7E 40 00 0D 01 00 5A 44 00 00 00 00 00 00 00 00 F7 which means if has selected the graphical LCD, so it all seems good so far...I originally connected the LCD last week sumtime - did u change the pdf hook diagram in this time? I'll check the connections with the one on the site now neways to make sure...Cheers...Dan Quote
d2k Posted March 18, 2003 Author Report Posted March 18, 2003 Meant to paste this:F0 00 00 7E 40 00 0F 00 01 00 01 00 00 00 00 F7 Quote
d2k Posted March 18, 2003 Author Report Posted March 18, 2003 okay, the lcd is connected as in the current pdf on the site... Quote
TK. Posted March 20, 2003 Report Posted March 20, 2003 Hi Dan,ok: MIOS is running, it has been configured for a graphical LCD and you see a black screen (means black pixels or just nothing?). So the error must be a missing or bad connection.Best Regards, Thorsten. Quote
d2k Posted March 20, 2003 Author Report Posted March 20, 2003 Hey T, Yup blackscreen...I've gone over the tracks a few times and they looked good, but it's happened before and no doubt it'll happen again - i'll go through it some more, is there a particular track or connection it could be?Cheers...Dan Quote
TK. Posted March 21, 2003 Report Posted March 21, 2003 Just to ensure (due to linguistical differences): does it mean that black pixels are visible, or that the screen is blank. ;-)Best Regards, Thorsten. Quote
d2k Posted March 21, 2003 Author Report Posted March 21, 2003 hehe ;p - yes, the black pixels are visible ;)it's a screen of black pixel blocks... Quote
TK. Posted March 21, 2003 Report Posted March 21, 2003 Fine - so it must be a minor problem. :)Power is ok, contrast also. Let's double check the CS lines, they must be connected to:CS1 -> Pin RD0CS2 -> Pin RD3CS3 -> Pin RC4CS4 -> Pin RC5 Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 arrrgh!!still no joy, and this is on a new core!T, can u dble chek the pdf/gif of the connection diagrams as I noticed on there u have:Pin 16 (CS1) - PIC Pin D2But u just posted:CS1 -> Pin RD0 I dunno if it's just a one-off mistake, as u have the wire going to S0/J8 of the core (which is RD0)...But just to make sure, can u confirm the rest is def right, as it's weird i'm gettin the same display (or lack of) with a new shiny core....TaDan Quote
TK. Posted March 23, 2003 Report Posted March 23, 2003 Hi Dan,so it's clear - you still have the old schematic. Maybe the file cache of your browser loaded the old plan? CS1 -> Pin RD0 (J8:SO)is the correct connectionBest Regards, Thorsten. Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 Hey T...I just meant in the pic u have:CS1 -> Pin RD0 (J8:SO)but in the text to the right it says: Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 whoops......it says:16 - CS1 (-> PIC PIN D.2)I had it wired correctly anyways in the first place and still no joy...:(All connections are fine - hard soldered direct to pin headers... Quote
TK. Posted March 23, 2003 Report Posted March 23, 2003 Ok, I see. The text is wrong, but the interconnections are correct.So - did you try Pin RD0?Best Regards, Thorsten. Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 yes, 16 was wired to J8/S0 (RD0) all the while...BestDan Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 well i give up - this bastard is killing me! >:(I musta retinned and resoldered all connections at least 5 times, i've tried using a header on the lcd and soldering to that, wiring direct to the lcd pinouts it's self - all the same results...:( Quote
d2k Posted March 23, 2003 Author Report Posted March 23, 2003 and now a few solder pads have burnt off with all the soldering/desoldering - great :( there goes my damn LC display.... Quote
TK. Posted March 24, 2003 Report Posted March 24, 2003 you've got mail...since you plan to send me a T6963C based GLCD for a new MIOS driver, just send me this display too, so that I can search for the problem.Best Regards, Thorsten. Quote
d2k Posted March 24, 2003 Author Report Posted March 24, 2003 ur a lifesaver T :)I'll send it all to ya tomorrow...thanks again...Dan Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.