GD32F3x0_Firmware_Library/Examples/CEC/Intercommunication/readme.txt

/*!
    \file  readme.txt
    \brief description of CEC intercommunication
*/

/*
    Copyright (C) 2017 GigaDevice

    2017-06-06, V1.0.0, firmware for GD32F3x0
*/

  This example is based on the GD32350R-EVAL board, it shows how to 
configure and use the CEC peripheral to receive and transmit messages. In this 
demo, the same program is loaded to two GD32350R-EVAL boards, 
then they are communicated through connecting respective CEC line(PB8) and GND.
When press the buttons(K3 or K4) on one board, LED1 and LED2 will blink once.
  Connect two GD32350R-EVAL boards through CEC line(PB8) and GND.