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adapted: https://github.com/dbuezas/lgt8fx/

source: https://github.com/brother-yan/LGTISP

LGTISP

LGT8Fx8P ISP download protocol implementation

introduction

This is an implementation of LGT8Fx8P ISP download protocol. You can make arduino board as ISP for programing LGT8Fx8P.

usage

Prepare a board to use as Programmer

  1. In the menu select: Tools/Arduino as ISP/SERIAL_RX_BUFFER_SIZE to 250
  2. Open File/Examples/LarduinoISP/LarduinoISP
  3. Upload the sketch.
  4. Go back to normal serial buffer size: Tools/Arduino as ISP/Default
  5. Put a capacitor (e.g 10uF) between the RESET pin and VCC pin of ISP board to avoid resets while uploading. Alternatively, short RESET and VCC, but make sure to NOT press the reset button in the board.
  6. Congratulations, you have a LGTISP Programmer now!

Connect the programmer to the target board

  1. Connect VCC, GND, SWD, SWC and RST
    LGTISP LGT
    D13 -> SWC
    D12 -> SWD
    D10 -> RST

Burn bootloader into LGT8Fx8P

  1. change Programmer to AVR ISP.
  2. click Burn Bootloader
  3. Now the target board can receive sketches via serial

Burn sketches directly through the programmer

  1. Open the desired sketch
  2. Configure the board from Tools as normal
  3. Change Programmer to AVR ISP.
  4. With everything wired, in the menu go to Sketch/Upload using Programmer (alternatively hold shift while clicking the upload button)
  5. Congratulations! the sketch is now uploaded without a bootloader! Uploading via serial should't be possible anymore on that board (unless you Burn the bootloader again)

Guide

rickygai created a very detailed guide here

author

ISP code: brother_yan This page: dbuezas

reference

LarduinoISP
ISP4LGT8F328P