www.megadrum.info

Hello,

I have started building megadrum. Can I somehow finish it without protected bootloader? I just want to test this drum module, and if everything is fine I will buy Dmitri's MCU. Can I use old versions of firmware, how I should programm it?

Thanks!

You can use an atmega 32/644 in programmed with the last unencrypted firmware in this thread viewtopic.php?p=12683#p12683

If your computer has a parallel port, you can program it by building an ISCP cable http://www.megadrum.info/sites/default/ ... _kicad.png and using ponyprog software

If you don't have that port, then you'll have to use a proper AVR programmer like an avrisp, usbasp etc. which works over a USB port, but you'll have to connect the header on the digital board different than you would normally with these programmers.

Thank you! your message is very useful to me.

Is it possible to use http://www.megadrum.info/configtool/ with megadrum_20100516 firmware? Thanks! :)

Hi, I'm trying to program PIC18F2550 with my old computer with Windows 98, Com port. Winpic doesnt detect PIC18F2550, but I can read it and it shows sth like 00000 00000 00000.... . Then try to program I get "read 0000000, wanted 000E22,...." How I could solve this problem?

Fuf... finally I programmed Pic. PCB had some bad contacts and I tried winpic on windows xp
And now... I have another problem.. My minds are messed about programming Atmega644...
In the forum I had read about MIDI-ox, ponyprog and I dont know which one i should use..

Do I need to write a bootloader like in this viewtopic.php?f=3&t=622 ?

What program i should use to write fuses like in this thread viewtopic.php?f=3&t=622 ?

Can I use 2x100ohm resistor in series for ISP cable?

Could someone give a link where I could find a clearl manual how to program Atmega644 for last unencrypted firmware?

Thank you!

There is no such guide or manual but your questions have been asked and answered many times so I suggest you to use the forum search or Google.

Hi again

I still have problems with Atmega644 programming. I made ISP cable, and try to write a code with PonyProg. Did I undestand everyting correctly?
1. Plug USB cable into MegaDrum and PC.
2. Plug ISP cable.
3. Select Atmega644, AVR isp I/O
4. Write Security and Configuration Bits
5. Press Write device and select .hex file?

I always get message Device missing or unknown device (-24)
Checked pcb cable, 10 times, cleaned flux. What else could be wrong? Is it possible I burned my Atmega because I found some shorts?

One of possible reasons might be that you programmed incorrect fuses and as a result you won't be able to (re-)program your Atmega unless you use a special Atmega Jtag or High voltage programmer, e.g. AVR MK2.