I seem to have Bricked my Non-R3 MEGA2560. Hopefully, someone can help me in this thread.
#FACEBAR BOOTLOADER HOW TO#
I do not have any instances of "!!!" in the code.Īny ideas how to push down larger code sizes? Here is the relevant portion of my boards.txt file: mega2560_3v3.name= ATmega2560v 3v3 The confusing portion of this is that I can no longer program the bootloader, and receive similar errors when I attempt to do so. I can force the issue by artifically inflating program size across that boundary, using code such as: int filler = Going above that gives me verification errors, such as:Īvrdude: verification error, first mismatch at byte 0x14454Īvrdude: verification error content mismatch
When my hex size is less than that critical size, it works perfectly.
I am programming this with an AVRISP mkii It was working beautifully until my code size grew past about 21kBytes. I am also using the stk500boot_v2_mega2560 on a 2560V running on 3.3V at 8MHz. Note: this is for 8MHz internal clocking.Ĭhange the low_fuses to 0xFF for 8 MHz external clocking. Mega2560b576.name=Arduino Mega 2560 or Mega ADK (8MHz Internal, Baud=57.6K) The mega2560 and mega2560V have the same support, only the max clock speed and voltage ratings are different. Just create a new boards.txt entry for it.
The IDE v1.0.4 or v1.0.5, \hardware\arduino\bootloaders\stk500v2\stk500boot_v2_mega2560.hex should be the latest corrected bootloader file.Īlso you can use the same bootfile for the meag2560 or mega2560V 8MHz and 57600 baud.
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