jdelgoulet Posted September 18, 2005 Report Share Posted September 18, 2005 Hi,Today, I plug my LTC module to the core to have the 2 In/Out leds and , eventually, the midi thru port.Before I plug the LTC module, everything works great, once it i splugged, evertime I'lm sending data, both in/out led are flashing at the same time but, waht surprinsing me is that displaying data or even sending data becomes very slow :(What can I do ??? Any idea ??? Heeeeellppppp !!! :-[Julien Quote Link to comment Share on other sites More sharing options...
raphael Posted September 18, 2005 Report Share Posted September 18, 2005 What chips have you stuffed (MAX232, Optocoupler..)? Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 18, 2005 Author Report Share Posted September 18, 2005 Hi Raphael,I only stuffed, the two74HC00 as indicated. Julien Quote Link to comment Share on other sites More sharing options...
pay_c Posted September 19, 2005 Report Share Posted September 19, 2005 Recheck your connection between the core and the LTC. Perhaps there´s something (sounds like switched input/output or similar).If not: Try plugging in the LTC without the 74HCs. If everything works, put back the one 74HC for the LEDs, if that still works etc.This way you come closer to the problem. Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 20, 2005 Author Report Share Posted September 20, 2005 Ok,I remove both 74HC00 and, of course, the leds do not work but now, the MIOS responds without any delay.I stuffed the first 74HC00 (the one near the pin that go to the core) -> no delay, but the leds do not workI stuffed the second 74HC00 adn remove the first one, the problem appears ... Any idea (I've already check the LTC module and everything looks ok :-( )herlp !!! Quote Link to comment Share on other sites More sharing options...
smashtv Posted September 20, 2005 Report Share Posted September 20, 2005 Sorry for the obvious question: Is your PIC ID set for LTC data rate or MIDI data rate?BestSmash Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 20, 2005 Author Report Share Posted September 20, 2005 Hi Smash'Well ... to be honest .. I don't have a clue about what you are talking ... Is that the ID for the bootstrap loader or something that I have to "define" in the C source code of my application ?Thanks ;-)I'm sure we are close ... I'm sure !! Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 20, 2005 Author Report Share Posted September 20, 2005 Finally I undersatnd what you mean by PIC ID : AYou are talking about : Device ID = 0x42MIDIbox-to-COM interfacecharacter LCDSo PIC ID should be 0000000000000142.The fact is : do I need to have this ID if I don't use the midi-to-com interface.I'm just using the LTC for the Midi thru and led in/out functoins .. thanks for your help. Quote Link to comment Share on other sites More sharing options...
moebius Posted September 20, 2005 Report Share Posted September 20, 2005 The fact is : do I need to have this ID if I don't use the midi-to-com interface.I'm just using the LTC for the Midi thru and led in/out functoins .. Nope.M Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 20, 2005 Author Report Share Posted September 20, 2005 So, everything looks good ...There mightbe something to put in the C code to tell the core that I have the LTC module plug ? ??? Quote Link to comment Share on other sites More sharing options...
moebius Posted September 20, 2005 Report Share Posted September 20, 2005 There mightbe something to put in the C code to tell the core that I have the LTC module plug ? ???No no. In this configuration it's simply tapping midi signalls from core.Bye, Moebiusp.s. By the way - are you sure you haven't created a midi feedback loop, when introducing LTC to the system? Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 21, 2005 Author Report Share Posted September 21, 2005 Thanks for all the reply Moebius !In fact, it "looks like" a midifeeback loop as everytime midi data are going out both leds are on.The problem is : what can I do to avoid midifeeback loop ? ... -> should have a look (again) at my circuit and looking for midi in and out connected ?Thanks a lot for your help guys ! Quote Link to comment Share on other sites More sharing options...
jdelgoulet Posted September 21, 2005 Author Report Share Posted September 21, 2005 YES !!!!!!!!! :)I re-check the LTC module against the gif of the LTC module using a magnifying glass .. and found out a very very small "solder bridge" between two tracks that shouldn't be here ...I plugged the 74HC00, the LTC module and youhou !!! it worked !!Thanks a lot everybody for your help !!!And sorry for posting thing that I should have resolved by myself ;-)PS : Just to say, that I put a post on the C MIOS programming part about ledrings issue ... but nobody answered .... ;-) Quote Link to comment Share on other sites More sharing options...
smashtv Posted September 21, 2005 Report Share Posted September 21, 2005 The fact is : do I need to have this ID if I don't use the midi-to-com interface.I'm just using the LTC for the Midi thru and led in/out functoins .. Now that this is fixed I can say DUH..... Caught me asleep in class again.... ;DSome days a diamond, but -most- days a stone.... ;)Have fun!Smash Quote Link to comment Share on other sites More sharing options...
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