/*!
    \file    readme.txt
    \brief description of I2C data transmission and reception by polling

    \version 2023-08-01, V1.0.0, HAL firmware for GD32F3x0
*/

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*/

  This demo is based on the GD32350R-EVAL-V1.0 board, it shows how to perform I2C data buffer 
transmission and reception between two boards by polling.

  Choose between master and slave through "#define MASTER_BOARD" in the "main.c" file:

  Uncomment "#define MASTER_BOARD" to select the master board.

  Comment "#define MASTER_BOARD" to select the slave board.

  First press the WAKEUP key, the tx_buffer will be transmitted by the master board to the 
slave board. If the transimision is completed, then press the WAKEUP key, the master board 
will receive data from the slave board and store in rx_buffer. Compare the written data and 
read data, if the same, LED2 will be on, otherwise LED2 will be off. If any error occurs, 
LED1 will be on.
