/*!
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.3
 *
 * @date        2025-05-31
 *
 * @attention
 *
 *  Copyright (C) 2023-2025 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 Configure OSCIN and OSCOUT pin as normal GPIO peripheral.


&par Hardware Description

using LED2(PB5).
using LED3(PB4).
using OSCIN(PA1).
using OSCOUT(PA2).


&par Software Description

After LED initalization, LED2 and LED3 on, and OSCIN and OSCOUT pin are configured
as normal pin, system will try to let LED3 off. after change system clock source,
system will try to toggle LEDs.


&par Directory contents

  - GPIO/GPIO_AF/Source/apm32f00x_int.c     Interrupt handlers
  - GPIO/GPIO_AF/Source/main.c              Main program


&par Hardware and Software environment

  - This example runs on APM32F003 MINI Devices.


&par IDE environment

MDK-ARM V5.36
EWARM V8.50.5.26295
Eclipse V2022-06（4.24.0）
