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multiple reprogramming of bootloaded chip

 
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jeremywilson

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Joined: 11 Jul 2011
Posts: 59
Location: United States

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PostPosted: Wed May 13, 2020 9:35 pm    Post subject: multiple reprogramming of bootloaded chip Reply with quote

I need help getting my bootloader to work more than once.

I program my bootloader into ATMega2561 with JTAG programmer, put main program hex on SD card, then reboot microcontroller.
It self-programs and then boots up the main program. All good.
However, it won't do that again. Subsequent reboots are not booting to the bootloader.
Please help! Thanks!

bootloader code attached.

(BASCOM-AVR version : 2081 , Latest : 2.0.8.2 )
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jeremywilson

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Joined: 11 Jul 2011
Posts: 59
Location: United States

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PostPosted: Wed May 13, 2020 11:42 pm    Post subject: Reply with quote

solved.
BOOTRST fuse wasn't set.
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