dcreatorx Posted July 19, 2006 Author Report Share Posted July 19, 2006 You mean that the drawing for the 6n138 on the PCB is wrong ? :S . . . Quote Link to comment Share on other sites More sharing options...
OrganGrinder Posted July 19, 2006 Report Share Posted July 19, 2006 Hi dcreatorxSmash has placed the parts correctly, its just that the pic and the 6n138 are oriented in opposite directions.if you view the core on SmashTV's site http://www.avishowtech.com/mbhp/mbhp_coreR4.html you will see that the orientation notch of the pic is to the left, while the orientation notch of the 6n138 is to the right. i only mentioned this because i caught myself assuming that the notch on both chips where to be facing the same way. i don't know what would have happened if i did this and turned the power on (probably just blow the 6n138).i will reiterate, i do not know of any mistakes done by SmashTV in the design of his boards.OrganGrinder Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 19, 2006 Author Report Share Posted July 19, 2006 That always was an unresolved question for me. In what exact direction you have to face the optocoupler ? Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 19, 2006 Author Report Share Posted July 19, 2006 Hello, I bought some new LEDS this evening to make the LED test. I connect the led to the MIDI out and It does not flicker when I send some Sysex dump, It only flickers when I power / unpower it up. Some suggestions ? Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 19, 2006 Author Report Share Posted July 19, 2006 I did the two LED MIDI in test. First one it lit, but don't flicker on receiving data. The second test simply don't flicker when sending Sysex mssgs. At this point, what should I do ? :-X Quote Link to comment Share on other sites More sharing options...
TK. Posted July 20, 2006 Report Share Posted July 20, 2006 Have you ever tried to swap the pins on the MIDI jacks - just to be shure that you haven't misread the original schematic? Just a question (it is described in the MIDI troubleshooting guide, but although you've mentioned this, I'm not sure if you really did all the tests)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 20, 2006 Author Report Share Posted July 20, 2006 I assume that what you mean with swapping the MIDI jacks is to set up correctly the jack config and the ports on the PC right ? It's cross connected. I mean, The cable that has the "MIDI IN" label, is connected to the "MIDI OUT" of core and viceversa. I posted a picture few posts before with my PC config if you want to see it. Thanks T.K. Quote Link to comment Share on other sites More sharing options...
TK. Posted July 20, 2006 Report Share Posted July 20, 2006 No, I mean the pins of the jack. When you look into the schematic:http://www.ucapps.de/mbhp/mbhp_core_v3.pdfyou will notice that it displays the rear view. Maybe you've mixed this with the front view? This happens very often, therefore I can just recomment: make a quick try and swap the pins - it has helped in most cases in the past.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 20, 2006 Author Report Share Posted July 20, 2006 Ok, yes now I know what you meant. I'm using the new PCB so In theory there's no failure, because you assemble the MIDI IN/OUT on the PCB and it fits perfectly there. Thank you for your help T. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 29, 2006 Author Report Share Posted July 29, 2006 Hi everybody ! I mounted my LCD and It's connected to the core. I get a black digit row when I turn it on. What this mean ? And other question : I bought my LCD from smashTV : the backlit does not work, and everything is pretty good connected, following the instructions and the LCD cable tutorial. Thanks. Quote Link to comment Share on other sites More sharing options...
Altitude Posted July 29, 2006 Report Share Posted July 29, 2006 I get a black digit row when I turn it on. What this mean ?That means its correctly installed. What bootloader version are you running? If it is 1.1, you have to update it to 1.2 for MIOS 1.9 to work properly, that may be the problem you are having Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 29, 2006 Author Report Share Posted July 29, 2006 The sticker on my PIC says that I'm using MIOS_BOOTSTRAP_V1_1B, Is that correct ?I remember that with the old cores, I have installed MIOS 1.8 in the ID_00 pic, the main one. Is it right that the LCD should show that MIOS is installed even without any connection via MIDI ? ( Nothing appears, just the black row when tested ) The tutorial say that the LCD screen is good for debugging. What should I do now ? Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 29, 2006 Author Report Share Posted July 29, 2006 I can't Install MIOS V1.9 because I can't get my core to communicate with my PC. Quote Link to comment Share on other sites More sharing options...
Altitude Posted July 29, 2006 Report Share Posted July 29, 2006 You cant upload mios 1.9 with the 1.1 bootloader, it will need to be updated to 1.2 (instructions are in the zip in the downloads section.) This may be a chicken or the egg type deal so I would at least try to bring it to the current version to make sure thats not the problem you are experiencing (I went through the same thing where it would just send the request no matter what i did to it) If your getting a request sysex string, then you should be good to go. You can also try just sending an older mios to see if thats the problem Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 29, 2006 Author Report Share Posted July 29, 2006 I tryed everything and I can't communicate with the PC. Do you think that would be better to try with other computer ? I don't think so, because my gameport was working fine with the older cores. Any help will be much appreciated. Thanks again. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted July 30, 2006 Report Share Posted July 30, 2006 I tryed everything and I can't communicate with the PC. Do you think that would be better to try with other computer ? I don't think so, because my gameport was working fine with the older cores. Any help will be much appreciated. Thanks again.Assume nothing ;)When troubleshooting it is imperative to do things one at a time. Go to this page http://www.ucapps.de/howto_debug_midi.htmlPerform all of the tests, in that order, one by one, and report your findings. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 30, 2006 Author Report Share Posted July 30, 2006 I did all the tests already, you can take a look at the older posts. But because the MIDI IN/OUT jacks are PCB mounted, I can't fix anything ? There is nothing wrong with the solder department. I even opened new optocouplers, in theyr respective bags to change them for the already installed. All the resistors and caps are mounted where they should be mounted. I get the right voltages. The LCD works. I will post detailed pictures of the core to show you how it is. Thanks. Quote Link to comment Share on other sites More sharing options...
TK. Posted July 30, 2006 Report Share Posted July 30, 2006 In one of your older posts I can see that you are using a MPU-401 MIDI interface. Is this part of your mainboard, or a soundcard? Did you check that the interface itself is working, e.g. with a direct loopback PC MIDI Out -> PC MIDI In?Just to ensure...If this is a gameport based interface, you could try a direct TTL connection over the MIDI Link port of the core w/o optocoupler. This maybe gives you some more input, what is working.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted July 30, 2006 Report Share Posted July 30, 2006 I did all the tests already, you can take a look at the older posts.I did, but I asked anyway, as sometimes the problems evade us, and your troubleshooting hadn't seemed to work so far, so it seemed like maybe something had been missed.I get the right voltages.Not at the MIDI in though.... Didn't you say the LED doesn't flicker? Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 30, 2006 Author Report Share Posted July 30, 2006 Ok, I did the MIDI in debug again . . I don't get any voltage there, and somethimes when I plug the core to the power I've got some sysex dump from midi out, that has the right voltage. What should I check if none of the LED MIDI in debug test are working ? Can you tell me how to check the polarity of the protection diode ? I'm following the smash TV PCB drawing, but just to know how. Thanks a lot.(Question) : What voltage do I need at the MIDI IN port ? Thanks. Quote Link to comment Share on other sites More sharing options...
TK. Posted July 30, 2006 Report Share Posted July 30, 2006 Could you please also answer my questions? Otherwise I've no clear view of your issue.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 30, 2006 Author Report Share Posted July 30, 2006 In one of your older posts I can see that you are using a MPU-401 MIDI interface. Is this part of your mainboard, or a soundcard? Did you check that the interface itself is working, e.g. with a direct loopback PC MIDI Out -> PC MIDI In?Just to ensure...If this is a gameport based interface, you could try a direct TTL connection over the MIDI Link port of the core w/o optocoupler. This maybe gives you some more input, what is working.Best Regards, Thorsten.Yes, when I do a loopback, it works. It is part of the mainboard, It does not come from a soundcard. Quote Link to comment Share on other sites More sharing options...
TK. Posted July 30, 2006 Report Share Posted July 30, 2006 So, this means you can try a direct connection to the gameport like described here:http://www.ucapps.de/mbhp/mbhp_midi_gameport.gifNote the the optocoupler has to be removed from the core board!Direction of the Diode: just compare it with the original schematic, which is available at the MBHP_CORE pageBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
dcreatorx Posted July 30, 2006 Author Report Share Posted July 30, 2006 Hi Thorsen ! ! In a moment of rage, I went to a friend's home and I took from him an spare Sound blaster Live!Now once installed, I can get to communicate finally ! I get the normal request and I tryed to upload small applications and everything works ! But I have the LCD connected, and It does not show the copyright message when connected. I tried to upload MIOS and then I've got the following error at MIOS studio : Reveived error code 04: Write failed ( Verify error or invalid address) Aborting after 3 errors. Thank you this is a great step for me ! Now what can happen ? I will check everything arround the tutorials by now . . . Best regards. Important : I see only the normal request that means that MIOS is already uploaded, not the continuous request. Quote Link to comment Share on other sites More sharing options...
TK. Posted July 30, 2006 Report Share Posted July 30, 2006 I must say, that this is exactly what I've expected, therefore I urged you to doublecheck the gameport MIDI in this way - mainboard based MIDI interfaces are sometimes not reliable, don't know if this is related to the chipset, or to the windows driver. Therefore you can find this info at the bottom of the troubleshooting page, but most people just ignore this hint, and expect the problem somewhere else... don't know, how this "trouble" can be avoided...To the upload errors: this behaviour is correct (invalid address), everything works well.Just read this thread again, look especially for the hints given for the mios v1.9 and bootloader v1.2 update procedure. Please read also the README.txt file of the MIOS update packageBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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