/**
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.0
 *
 * @date        2026-01-15
 *
 * @attention
 *
 *  Copyright (C) 2026 Geehy Semiconductor
 *
 *  You may not use this file except in compliance with the
 *  GEEHY COPYRIGHT NOTICE (GEEHY SOFTWARE PACKAGE LICENSE).
 *
 *  The program is only for reference, which is distributed in the hope
 *  that it will be useful and instructional for customers to develop
 *  their software. Unless required by applicable law or agreed to in
 *  writing, the program is distributed on an "AS IS" BASIS, WITHOUT
 *  ANY WARRANTY OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the GEEHY SOFTWARE PACKAGE LICENSE for the governing permissions
 *  and limitations under the License.
 */

&par Example Description

This example describes how to use WFI event to enter sleep mode and wake up
using external interrupt.
At startup, press KEY(PB10) to occur Wait For Interrupt(WFI) event, and device
will enter sleep mode. The device will wake up if press KEY again.
The status of device is displayed on serial assistant through UART0.

&par Directory contents

  - NVIC/NVIC_WFI/Source/main.c               Main program
  - NVIC/NVIC_WFI/Source/g32f031_int.c        Interrupt handlers

&par Hardware Description

The USART is configured as follows:
    - TX:PA10, RX:PA11
    - BaudRate = 115200 baud
    - Word Length = 8 Bits
    - One Stop Bit
    - No parity
    - Hardware flow control disabled (RTS and CTS signals)
    - Receive and transmit enabled

&par IDE environment

  - MDK-ARM V5.40
  - EWARM V8.50.5.26295
  - ECLIPSE-EMB V4.24.0

&par Hardware and Software environment

  - This example runs on G32F031 EVB Devices.
