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MCUdude / MegaCore

Arduino hardware package for ATmega64, ATmega128, ATmega165, ATmega169, ATmega325, ATmega329, ATmega640, ATmega645, ATmega649, ATmega1280, ATmega1281, ATmega2560, ATmega2561, ATmega3250, ATmega3290, ATmega6450, ATmega6490, AT90CAN32, AT90CAN64 and AT90CAN128
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Need a Bootloader for ATmega2561 working on 12.500 MHz #173

Closed miksumin closed 2 years ago

miksumin commented 2 years ago

I am using MegaCore with ATMega2561 working on External 12.500 MHz frequency but there is no Optiboot bootloader for it. Can you please build it for me?

MCUdude commented 2 years ago

It's all there. Build it yourself, it's a good learning experience

miksumin commented 2 years ago

I don't have 'make' package

miksumin commented 2 years ago

There is no ......\tools\avr\utils\bin\make

miksumin commented 2 years ago

Please help

miksumin commented 2 years ago

make atmega2561 AVR_FREQ=12500000L BAUD_RATE=115200 LED=G0 LED_START_FLASHES=2 UART=0/1

MCUdude commented 2 years ago

A baud rate of 115200 at 12.5 MHz wouldn't work at all. Too much error. Look at the U2X=1 field, that's what the bootloader uses. Choose a green baud rate instead.

Skjermbilde 2021-07-30 kl 19 59 34
miksumin commented 2 years ago

Ok, I hope 57600 would be ok. So let's use the following: make atmega2561 AVR_FREQ=12500000L BAUD_RATE=57600 LED=G0 LED_START_FLASHES=2 UART=0/1

MCUdude commented 2 years ago

OK, here you go.

12500000L.zip

miksumin commented 2 years ago

Many thanks