Firmware update

[alkama]

Hi,

Firstly i want to say, i was readed the article about firmware update from the FAQ. But i think my problem is elsewhere than updating procedure.

When i boot my Megadrum with left button pressed there is nothing on LCD, but during pressed left button LED flash repeatedly. Just when i press down button the LCD showed this two lines, both, at once:

'Fw updater 16MHz
Send Sysex now'

During and after sending firmware LCD doesn't show anything other.

Where can be the problem?

Thanks.

[Firelord]

I'm running out of ideas. You can try re-programming the bootloader or checking your controls for defects.

[alkama]

I will try to reprogrammed bootloader.

I wonder about keyboard schematic in this link http://www.megadrum.info/sites/default/ ... _kicad.png .
Why over diodes are blue characters A and C on the contrary with red and diodes schematic? How i should solder it correct?

And about programming, may can i update my frimware by LPT that as bootloader?

[Firelord]

I wonder about keyboard schematic in this link http://www.megadrum.info/sites/default/ ... _kicad.png .
Why over diodes are blue characters A and C on the contrary with red and diodes schematic? How i should solder it correct?

I think that it is not really important, from what I saw your controls were OK.

And about programming, may can i update my frimware by LPT that as bootloader?

Yes, but the preferred way is still using a bootloader. Then you don't have to use PonyProg/LPT every time you need to update.

[alkama]

I also think this are anode and cathode, but i don't know which description is correct.

I know, but bootloader doesn't load with left key pressed.

[Firelord]

The correct way is A ->| C.