www.megadrum.info

Do I apply the same changes for AT644 firmware to be able to update via sysex?
No difference?

What do you update via SysEx?

dmitri wrote:What do you update via SysEx?

I have ordered an Atmega644-20PU from synthex and I want to know if I can update the firmware the same way I do now with Atmega32 processor.
I update the firmware with midiox.
My question is: Do I have to alter the hex for 644 the same way as for AT32 to be able to update firmware with midiox?

dmitri wrote:A MegaDrum firmware file must be modified slightly: three bytes, 0xF0 0x7F 0x40, must be prepended and one byte, 0xF7, must be appended and rename the *.hex file to *.syx, e.g. see this file:

megadrum32_16_32_20080130_2.syx

Does this apply to the 644 firmware too?

In theory yes, the process is the same. Why in theory? Because I haven't yet created/tested a SysEx bootloader for Atmega644.

dmitri wrote:In theory yes, the process is the same. Why in theory? Because I haven't yet created/tested a SysEx bootloader for Atmega644.

If Dmitri will not compil the SysEx bootloader for Atmega644, I will do it

Just compiling it may work. Or it may not work since it may need headers/makefile adjusted for Atmega644.

dmitri wrote:Just compiling it may work. Or it may not work since it may need headers/makefile adjusted for Atmega644.

Will it be long until you have tested bootloader on the 644?

If it will be soon, I'd like Synthex to hold the shipment until it works and program the 644 with bootloader.

/Thanx

I don't think I will look into it in a few weeks

slayer666 wrote:

dmitri wrote:Just compiling it may work. Or it may not work since it may need headers/makefile adjusted for Atmega644.

Will it be long until you have tested bootloader on the 644?

If it will be soon, I'd like Synthex to hold the shipment until it works and program the 644 with bootloader.

/Thanx

I do the bootloader for the Atmega644 this week-end !

Synthex wrote:

slayer666 wrote:

dmitri wrote:Just compiling it may work. Or it may not work since it may need headers/makefile adjusted for Atmega644.

Will it be long until you have tested bootloader on the 644?

If it will be soon, I'd like Synthex to hold the shipment until it works and program the 644 with bootloader.

/Thanx

I do the bootloader for the Atmega644 this week-end !

Great!!!
Good Luck with it