Add the package to the arduino Boards Manager Urls:

• Go to Preferences
  • paste this url in Boards Manager URL: https://raw.githubusercontent.com/dbuezas/lgt8fx/master/package_lgt8fx_index.json
• Go to Tools/Board/Boards manager
  • Type lgt8fx in the search box
  • install lgt8fx

Now the boards appear in the IDE and you can also select the clock speed.

32Mhz is twice as fast as a conventional arduino nano! Actually even faster as many operations take less clock cycles than in the atmega328p. Check out some benchmarks

Explore the discussions: https://github.com/dbuezas/lgt8fx/discussions

• Fast_IO update
• Automatic prescaler setup
• In Menu support of 1, 2, 4, 8, 16 and 32 Mhz
• Digital Analog Converter
• Voltage References INTERNAL1V024/INTERNAL2V048/INTERNAL4V096/DEFAULT/EXTERNAL (useful for example for analogRead or DAC analogWrite via analogReference(xxx));
• Analog Comparator (page 224 of datasheet v1.0.4)
• Differential Amplifier. See this Example.
• Computation Accelerator (page 52 of datasheet v1.0.4) Work by others
• SoftwareSerial at any clock speed. Updated implementation without timing tables by #jg1uaa
• In-menu external clock support (by #seisfeld)
• 2 to 6 high current 80ma IO pins (thanks #rokweom)
• 328p Arduino ISP (from #brother-yan)
• SSOP20 328p Support (by #LaZsolt)
• (in next release) Precise delayMicroseconds (by #LaZsolt)
• (in next release) Faster Analog Read (by #jayzakk)
• (in next release) Fixed analogReference (reported by #macron0)
• (in next release) Enabled AREF pin as A10 analog input (by #jayzakk)
• (in next release) Power reduce register definitions (by #KooLru)
• (in next release) Support for interrupts on all timers and comparators (by #jayzakk)
• (in next release) Arduino EEPROM API (by #SuperUserNameMan

• Support 32 Mhz and other clock speeds
• Differential Amplifier API
• Better Boards Menu
• Installation via Board Manager Urls
• SoftwareSerial @32Mhz
• FastIO ported from https://github.com/LGTMCU/Larduino_HSP

Create more pinouts for the other boards!

• Check the Wiki for more content by contribuitors
• And you may also find something in the closed Issues
• Core is based on Larduino_HSP v3.6c with fastIO backported from https://github.com/LGTMCU/Larduino_HSP
• And inspired from Ralph Bacon's video: https://youtu.be/Myfeqrl3QP0 (Check his channel, he's uploaded a lot of great videos)
• Great place to gather data about this boards: https://github.com/RalphBacon/LGT8F328P-Arduino-Clone-Chip-ATMega328P
• Datasheet (Chinese) LGT8FX8P_databook_V1.04
• Datasheet (English) LGT8FX8P_databook_V1.04 thanks to #metallurge
• Datasheet (English) LGT8FX8P_databook_V1.05 By Watterrott
• Instruction set clk vs avr By unknown, claim if you are the author
• Work on the differential amplifier
• "Forbiden tech from China has arrived" https://www.avrfreaks.net/forum/forbiden-tech-china-has-arrived?page=all
• Larduino ISP for 328d https://github.com/Edragon/LGT/tree/master/Toolchain/ISP/LarduinoISP-master
• https://www.eevblog.com/forum/projects/anyone-here-interested-in-the-logic-green-avrs-lgt8f328p/
• http://coultersmithing.com/forums/viewtopic.php?f=6&t=1149
• LGT SDK Builder
  • "very useful during development, hopefully others can find it helpful too." @sengit
  • Document page : http://www.lgtic.com/2017/11/11/lgtsdk_builder/
  • Download link : http://www.lgtic.com/upload/tools/lgtsdk_builder/LGTSDK_Builder_latest.rar

PS: Just want to say thanks for this git, helped me a lot!

I have no association with Arduino, Logic Green, Atmel or anything. I just wanted to have a convenient way to use these boards and get them to work without hacks at max speed

https://tooomm.github.io/github-release-stats/?username=dbuezas&repository=lgt8fx

• #Larduino_HSP for doing 99.9999% of the work
• #RalphBacon introducing most of us to the board
• #dcfusor for help with fast io backporting
• #HI-SEBA for help with software serial
• #dwillmore for creating the wiki, serial adapter troubleshooting, more examples of boards and wemos-TTGO-XI board support
• #seisfeld for adding in-menu support for an external oscillator
• #jg1uaa for the updated Software Serial without timing tables and missing methods
• #LaZsolt for adding SSOP20 lgt8f328p support and precise delayMicroseconds
• #jayzakk for fixing the ADC prescaler for faster analog reads