MegaCore v2.1.0

Changelog:

• Add MPLAB SNAP and PICkit4 programmers
• Fix incorrect low fuse setting for ATmega2561 (#155)
• Fix missing parenthesis in the round() macro that caused it to return incorrect results
• Revert abs() macro to use the "standard" Arduino implementation rather than being a wrapper for __builtin_abs()
  • Apparently, __builtin_abs() doesn't handle floats
• Improve timing accuracy for all supported clock frequencies. Huge thanks to @cburstedde!

MegaCore v2.0.6

Changelog:

• Fix typo in round() and constrain() macros (#146)

MegaCore v2.0.5

Changelog:

• Fix export compiled binary for Windows computers
• Remove bundled Ethernet library
  • The one that ships with Arduino IDE are compatible and up to date
• Improve "unsafe" macros
  • This includes abs(), min(), max(), sq(), round() and constrain()

MegaCore v2.0.4

Changelog:

• Implement PROGMEM1, PROGMEM2 and PROGMEM3
  • Great if you want to store data further up in the memory
• Fix issue where 1 MHz compiled bootloaders ran at 8 MHz
• Load user application and bootloader when uploading using programmer and a bootloader option is selected.
  • If you want to wipe the bootloader, simply choose "No bootloader"
• Generate assembly output when exporting binaries
• Add EEPROM retain menu option
  • Only applies when uploading using a programmer or burning bootloader
• Update Arduino core files
  • Replace sbi and cbi macros with "regular" bitshifts for reduced compiled size and improved execution speed

MegaCore v2.0.3

Changelog:

• Update Optiboot flash
• Update corefiles
• Update Wire library to reflect the official version
• Add programmers
  • Mandatory in the next release of Arduino IDE (1.8.13)
• Add PIN macros
  • You can now refer to pins by writing PIN_PB0
• Add 4, 2 and 1 MHz external oscillator options
• Add 4 and 2 MHz internal oscillator options

MegaCore v2.0.2

Changelog

• Fix incorrect flash size for ATmega680 and ATmega1280
• SoftwareSerial library updated
  • Now "regular" interrupt pins can be used. Great for devices with no PCINT!
• All 86 IO pins are now mapped in the Arduino MEGA pinout (from previously 70)
• Fix annoying compiler warnings
• Add dedicated bootloader menu
  • You can now select what UART to use for upload, and you can choose not to use a bootloader at all
• Add AT90CAN32, AT90CAN64, and AT90CAN128
• Update Ethernet library
• Rename TWI buffer for easier manipulation in PlatformIO
• Add 14.7456MHz, 11.0592MHz, 7.3728MHz, 3.6864MHz and 1.8432MHz clock frequencies
• Add printf to print class

MegaCore v2.0.1

Changelog:

• ATmega64/128 now support SoftwareSerial using its regular interrupt pins (INT0 - INT7)
• Tone library is now working properly on ATmega64/128
• Atmel ICE and ArduinoISP.org programmers added
• Update MCUdude_corefiles to the latest version
• Update optiboot_flash to the latest version

MegaCore v2.0.0

A new release of MegaCore is now available. This release bumps MegaCore to v2.0.0:

Changelog:

• Add support for ATmega640/1280/2560
• Add "AVR pinout" for ATmega640/1280/2560
• Recompiled bootloaders and fix repo structure
• Core files updated from the latest Arduino release, and moved these files to a separate repository
• Fix bug that caused INT4 not to work
• Add missing PCINT macros for ATmega1281/2561

MegaCore v1.0.6

Changelog:

• Add support for ATmega1281 and ATmega2561

MegaCore v1.0.5

Changelog:

• Add separate BOD menu option
• Add 18.432 MHz oscillator option
• Improved documentation