Program Mega2560 via USB - how to?

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jarlel
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Program Mega2560 via USB - how to?

Post by jarlel » Fri May 18, 2018 6:59 am

Hi, I have used the ISCP until now to program/flash a Mega2560 Arduino. I would like to start using the USB instead, but have not made it work yet.
Which settings should I use in Companion for this? Do I need to take other actions to make it work?

Thanks.

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MikeB
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Re: Program Mega2560 via USB - how to?

Post by MikeB » Fri May 18, 2018 9:32 am

In settings, choose communications, then try to find what programmer AvrDude should use, possibly Arduino. If you have flashed the '2560 using a USBASP, it is likely you have erased any bootloader that was in the '2560, and you need one to flash using the USB connection.

Mike
ersky9x/er9x developer
The difficult we do immediately,
The impossible takes a little longer!

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kalle123
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Re: Program Mega2560 via USB - how to?

Post by kalle123 » Fri May 18, 2018 10:02 am

Are you trying to use the Mega as normal Arduino or do you want to use it with openTX?

#1. case just flash the bootloader with the Arduino IDE

#2. case Download from here https://github.com/Ingwie/NextStepRc-2.18

then ... (if I recall right ;) )

1. Arduino fuses flash (usbasp ISP) "mega2560_usbasp_flash_fuses.bat"

2. Arduino bootloader flash (usbasp ISP) "mega2560_usbasp_flash_bootloader.bat" with "mega2560_stk500v2boot_opentx.hex"

3. Load Mega over USB and Companion with opentx firmware

... detailed description in "MEGA2560_FlashProcedure.pdf"

jarlel
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Re: Program Mega2560 via USB - how to?

Post by jarlel » Tue May 22, 2018 7:02 am

I am using it for OpenTX. Thanks - will try #2!

:-)

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