/*!
    \file    readme.txt
    \brief   description of LPTIMER timeout example

    \version 2026-02-02, V2.4.0, firmware for GD32L23x, add support for GD32L235
*/

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*/

  This example is based on the GD32L233R - EVAL - V1.0 / GD32L235R - EVAL - V1.0 board,
it shows how to use the LPTIMER to wake up the MCU from deepsleep mode.

  Press key WAKEUP (K3) to enter deepsleep mode, then LED2 stops in a certain status (on
or off). When the LPTIMERN count value matches the value of compare register, mcu will be
wakeuped from deepsleep mode, and the transfer goes on normally and LED2 sparks again.

  In this demo, LPTIMERN is clocked by IRC32K and starts counting by the signal on the
LPTIMERN_ETI0 (PA5). The external signal is connected to LPTIMERN_ETI0 (PA5) pin and the
rising edge is used as active edge.

  The LPTIMERN_ETI0 (PA5) can connect to PC13 with TAMPER key (K2).
