MGodar

Hi all, Recently I could finish my first Midibox project, but I faced a small issue. I need your help - if somebody had already similar - or the same problem. My setup is quite simple: MIDIO128 V3 project using the latest V3_009 version. 1 MBHP_CORE_LPC17 core, 1 MBHP_DIO_MATRIX module. I created 2 input matrices according to http://ucapps.de/midio128/midio128_v3_dio_scanmatrix.pdf. 1st matrix: channel 1, DIN 1, DOUT 1 2nd matrix: channel 5, DIN 2, DOUT 2 Everything is working fine - anyway many thanks for that, I am quite thankful about this project. Working like charm! The problem is the following: If I keep pressed 1 button on the 2nd matrix, and I press a button on the 1st matrix -> I get extra 3 events on the 1st channel that do not belong to the key pressed. The 3 extra events come with same note, with off-on-off states. If I press a different key, different extra note values are sent. If no button is kept pressed everything is ok. I am quite confused with this behavior. It is strange as I think there are many people who could already try it out in the last 10 years. But on the meanwhile my matrices are working separately, and physically "far" from each other. Please help - if anybody has an idea! Thanks in advance!

Hi Thorsten, Yesterday I tested successfully the MIDI128 v3 with two button (optocoupler) matrix - with the INVERTED_DIN option. It was working fine. Many thanks for helping me, and implementing this feature. Anyway I can reach the SD card in MSD mode, I can read the content, but when I try to save my changes in config file, it freezes the process. My system is Win7 64bit, and I think the GM5 driver causes this problem. But anyway it is working fine now, so thanks a lot!!! Best regards, Marton

Hi Thorsten, I installed the driver again and it is working now. At least the Studio can see the Core. Maybe the first installation was corrupted... But I have now again problem, with the SD card. I activate the MSD function, but I cannot reach the card. When MSD is off, I can see that No FAT. It was working with the previous version. And also I cannot format this. Sorry for disturbing you these things... Marton

Hi, Thank you for this change! But there should be an error with the code now. I uploaded the new bootloader and MIDIO 128. With MIOS studio the first scan of the midi ports is successful, I can see the new version of MIDIO128, but if I press the Query button, it can't reach the core. I tried to upload the Bootloader again, but the was a Timeout. And it happens always. I installed a new driver for MIDIO128, but did not help. Do you have any idea, what is happening? Thanks! Marton

Hi Thorsten, Thanks for the quick answer! In the matrix I am using the structure of the original plan. So the diodes are not reversed. The only difference is that as buttons I am using optocouplers. They are working so: when they can see each other (Button OFF) the output is 0V. When the key from the keyboard is pressed they can't see each other (Button ON), and he output is 5V. In this way the MIDI messages are generated, but Note OFF is generated for Button ON, and vice versa. I hope I could write it clearly... :) Many thanks for implementing this feature!!! Marton

Hi everybody and TK! I have just joined to the community, as I built my first MIDIbox project yesterday! It is working fine! Many thanks to TK, as it is a really flexible and useful project. I built a MIDIO128 v3 for midifying an organ console. It is working really fine. I am using a matrix for scanning the keyboards. I have only one question (or request for improvement). Would it be possible to add a flag to invert the behaviour of the matrix. I mean there is a flag for DIN (midio_patch_cfg.flags.INVERSE_DIN). As I saw there is nothing for the matrix like this. I think it would be useful - especially for me :) Or is there an other way to do this? Thanks! Cheers! Marton