/*!
    \file    readme.txt
    \brief   description of TIMER and Key EXTI mode example

    \version 2025-08-19, V1.3.0, demo for GD32E51x
*/

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*/

  This demo is based on the GD32E518C-START-V1.0 board, it provides a description
of how to use TIMER and EXTI to control LED. It uses Mini USB interface to supply power. 
Wakeup key, LED and GD-Link are also included.

  After system start-up, firstly, LED1 and LED2 is flashed once for test. The user can toggle 
the output state of LED1 by pressing the Wakeup key. Connect PA6(TIMER2_CH0) and PA4 
with DuPont line. The LED2 will be toggled every 500ms.

  On the GD32E518C-START-V1.0 board, LED1 is connected to PB4, LED2 is connected to PB8,
Wakeup key is connected to PA0.
