18 replies to this topic

[Lauchi]

Hi,

this is my first Midiprojekt and i am not very good at electrical stuff.
Now i have soldered my Core Modul together and powered it up. I uploaded the Mios8 without problems.
When i connect the LCD, somewhere it says, i should see a copyright symbol, but i don´t. All it does is to light up... I have allready checked this schemata http://www.ucapps.de...p_lcd_mios8.pdf but i think i made everything right.
How can i check, if i made everything right?
Also in MIOS Studio this message [48293.055] f0 00 00 7e 40 00 0f 00 f7 keeps repeating all the time. (Only the number in [] brackts keeps on counting) Does that mean, i have a shortcut?

[ultra]

i'm not positive, but your message might be an upload request.

did you check your contrast?

[Lauchi]

I did, turned the two potis from left to right, did not change anything :(

What do you mean with upload Request? I am not doing anything in MIOS Studio, like uploading eg.

Edited by Lauchi, 14 April 2012 - 08:00.

[Gilesjuk]

When turning the core on it asks for you to upload MIOS to it if it isn't already loaded. You may only have the bootloader programmed on your PIC chip, so you won't see a ready message or the copyright message.

This explains what you will see:

http://www.midibox.o...oku.php?id=mios

Edited by Gilesjuk, 14 April 2012 - 22:22.

[Lauchi]

Nope, i have allready loaded up MIOS, also MIOS Studio says "Application is up and running". I tried to upload it once again, but nothing changed. How can i see if everything is allright? Maybe my LCD is broken somehow or i connectd it the wrong way...

[Gilesjuk]

Okay. Well the LCD wiring is easy to get wrong. I suggest double checking it?

[Lauchi]

Hi,

i have ordered in mikes midi shop. Is it possible, that the wiring differs from the wiring described in the lcd section? There is a 1 and a 16 on the LCD, and i suppose that means, it is wired as usual. (like here http://www.sprut.de/...dex.htm#stecker)
When i turn the contrast pot, sometimes there appear some white squares, but vanish a few seconds later.
I will try to solder the cables directly now, because i soldered them with plugs. Maybe i have got a bad connection or something...

[Gilesjuk]

This is the guide to follow:

http://www.midibox.o...x_lcd_cable.pdf

[Lauchi]

Did not help, i wired it that way...

But when i press query in MIOS Studio the core starts sending upload messages and does not stop. What the fuck? And when i try to upload mios again, it says "MIOS8 Bootloader Mode cannot be entered - try again?"
What does that mean?
As i said, Mios is allready installed and applikation is up and running.
Or shall i proceed with my DIN/AIN/DOUT Module without careing about the lcd?

Edited by Lauchi, 15 April 2012 - 14:21.

[Gilesjuk]

Are you sure you have the cable connected to the core the correct way? there's two ways it can go on and both tend to light up the display.

[Lauchi]

You think my LCD is mirrored? But why is there a 1 and a 16, if that is false? I think i´ll try that tomorrow and post the result here.
The Uploadmessages are not important? Or is that the normal way?

[Lauchi]

ok, it did not help anything. I mirrored it and now, i´ve soldered it the right way, like my datasheet and ucapps says it. And every time i press Query my midi in messages starts freaking out and sends endless Midi Messages like this

Scanning for MIDI Inputs...
[1] LoopBe Internal MIDI
[2] Traktor Kontrol S4 (*)
MIDI Monitor ready.
[3590.813] f0 00 00 7e 40 00 01 f7
[3599.316] f0 00 00 7e 40 00 01 f7
[3617.948] f0 00 00 7e 40 00 0f 00 f7
[3617.955] f0 00 00 7e 40 00 0f 00 f7
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[3620.342] f0 00 00 7e 40 00 0f 00 f7
[3620.349] f0 00 00 7e 40 00 0f 00 f7
[3620.357] f0 00 00 7e 40 00 0f 00 f7
[3620.364] f0 00 00 7e 40 00 0f 00 f7
[3620.373] f0 00 00 7e 40 00 0f 00 f7
[3620.378] f0 00 00 7e 40 00 0f 00 f7
[3620.385] f0 00 00 7e 40 00 0f 00 f7
[3620.392] f0 00 00 7e 40 00 0f 00 f7
[3620.399] f0 00 00 7e 40 00 0f 00 f7
[3620.406] f0 00 00 7e 40 00 0f 00 f7
[3620.413] f0 00 00 7e 40 00 0f 00 f7
[3620.422] f0 00 00 7e 40 00 0f 00 f7
[3620.427] f0 00 00 7e 40 00 0f 00 f7
[3620.436] f0 00 00 7e 40 00 0f 00 f7
[3620.441] f0 00 00 7e 40 00 0f 00 f7
[3620.448] f0 00 00 7e 40 00 0f 00 f7
[3620.455] f0 00 00 7e 40 00 0f 00 f7
[3620.462] f0 00 00 7e 40 00 0f 00 f7
[3620.469] f0 00 00 7e 40 00 0f 00 f7
[3620.476] f0 00 00 7e 40 00 0f 00 f7
[3620.485] f0 00 00 7e 40 00 0f 00 f7
[3620.490] f0 00 00 7e 40 00 0f 00 f7
[3620.497] f0 00 00 7e 40 00 0f 00 f7
[3620.504] f0 00 00 7e 40 00 0f 00 f7
[3620.511] f0 00 00 7e 40 00 0f 00 f7
[3620.518] f0 00 00 7e 40 00 0f 00 f7
[3620.525] f0 00 00 7e 40 00 0f 00 f7
[3620.533] f0 00 00 7e 40 00 0f 00 f7
[3620.540] f0 00 00 7e 40 00 0f 00 f7
[3620.549] f0 00 00 7e 40 00 0f 00 f7
[3620.554] f0 00 00 7e 40 00 0f 00 f7
[3620.561] f0 00 00 7e 40 00 0f 00 f7
[3620.568] f0 00 00 7e 40 00 0f 00 f7
[3620.575] f0 00 00 7e 40 00 0f 00 f7
[3620.582] f0 00 00 7e 40 00 0f 00 f7
[3620.589] f0 00 00 7e 40 00 0f 00 f7
[3620.597] f0 00 00 7e 40 00 0f 00 f7
[3620.604] f0 00 00 7e 40 00 0f 00 f7
[3620.613] f0 00 00 7e 40 00 0f 00 f7
[3620.618] f0 00 00 7e 40 00 0f 00 f7
[3620.625] f0 00 00 7e 40 00 0f 00 f7
[3620.632] f0 00 00 7e 40 00 0f 00 f7
[3620.639] f0 00 00 7e 40 00 0f 00 f7
[3620.646] f0 00 00 7e 40 00 0f 00 f7
[3620.653] f0 00 00 7e 40 00 0f 00 f7
[3620.661] f0 00 00 7e 40 00 0f 00 f7
[3621.750] f0 00 00 7e 40 00 01 f7

when i pull the power plug, it stops... wtf?
I don´t even have a clue what is going on ....

Edited by Lauchi, 21 April 2012 - 14:31.

[Lauchi]

And i am pretty sure, i´ve soldered something wrong. I just touched the IC3 and burned my finger really hard ;) I had this once too, but that was when i had a few shortcuts on my lcd wireing and i thought that was the reason. But it looks like it allways starts to heat up, when i plug in the power....
But why can i upload mios, if i have a shortcut or something like this? Can that be the solution for my lcd problem?

[Lauchi]

Ohh, i just realized, that i soldered a 220 res on a place, where a 1,2k should be.... That was R6.... How can i check, if i have burned everything? :/

edit:
oh no, wait, i put the right resistor there, i am not used to the color codes yet...
i also left out the bridges on the back, should not be a problem, as the MB64 does not use SID and stuff.

edit2:
"Also the polarity has not to be taken into account." from J1 means, that i do not have to measure, where my plus or minus pole on the power input is? I just thought, maybe that is the problem...

Edited by Lauchi, 21 April 2012 - 11:08.

[Lauchi]

ok, i´ve "narrowed it down".
The heating up came from the fact, that my DIN module was pluged in reverse. I changed it--> the IC3 doesn´t heat up anymore. I also loaded up the MB64 hexfile, it said 179 errors that has been fixed (no issue). Whatever that means. But it was uploaded without any problems. Now, as i understood this right, the MB64 should be installed and my buttons/faders should work properly. The standardmapping but they should work. Well the one button i have solderd to the DIN Module does not send any midi. Also, if i shortcut ground and a button, shouldn´t i get a midi message? My Questions are now:
How can i Test, if my LCD is burned?
How can i test, if my DIN Modul is damaged?
How can i test, if i have a shortcut on the core Module, or if everything is soldered properly? (Can that be an option? I thought, installing MIOS is a proove, that everything is soldered the right way?)

Would be cool, if somebody helped me out, i am not much of electronic geek, and apart from the docu, i can´t do so much :/

Edited by Lauchi, 22 April 2012 - 10:10.

[Lauchi]

Update:
The Din Module works. I´ve installed the ain64_din128_dout128_v2c. Now i only have to solder the ain/dout modules and then i am finished. But the LCD Doesn´t work yet :/ Would be nice if i got this to work, as I paid 10€ for it...
Any Suggestions?

[Gilesjuk]

Is your power source up to the job? the backlight does need a few mA of power, the rest of the circuitry isn't demanding in power.

[Lauchi]

I don´t have it here right now, but i am pretty sure, it has the power. I usually power up my S4 with this thing. But is there a chance, that i have to much volt? I think, i read something, and i think my PSU has 9v-12v...

[Gilesjuk]

I don´t have it here right now, but i am pretty sure, it has the power. I usually power up my S4 with this thing. But is there a chance, that i have to much volt? I think, i read something, and i think my PSU has 9v-12v...

PIC Core? it has a regulator and rectifier so it is pretty tolerant. Excess voltage is burned off as heat, so it can be worth trying to supply the minimum you need. I have a 7V AC transformer connected to mine.

But if your PSU can't supply the current needed for the backlight then it won't light up.

I would check the A and K connections of the LCD with your multimeter in continuity mode, being an LED it will pass current one way and not the other way. But if you get no reading both ways then the LED may have popped.

You should get the backlight at the very least as that's a simple circuit.