/*!
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.2
 *
 * @date        2022-06-23
 *
 * @attention
 *
 *  Copyright (C) 2021-2022 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 usefull 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

The example shows how to configure IWDT and feed dog to prevent a system reset.
After IWDT initialization, if press KEY1 to start feed watchdog, System enters into a infinite loop,
feed dog before the counter. reach a given timeout value to prevent system reset and
keep LED2 blinking regulary. Ohterwise System will reset about 4 seconds!
Pressing KEY1 again to stop feed dog will trigger system reset in 4 seconds, when the counter reach a given timeout value. LED3 will be lighted when a system reset is triggered by IWDT.
if system reset   is triggered by IWDT, "IWDT Reset" will be print with USART1.

The USART1 is configured as follows:
    - TX:PA9, RX:PA10
    - 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 Directory contents

  - IWDT/IWDT_Reset/Source/apm32f4xx_int.c         Interrupt handlers
  - IWDT/IWDT_Reset/Source/main.c                        Main program

&par IDE environment

  - MDK-ARM V5.36
  - EWARM V8.50.5.26295

&par Hardware and Software environment

  - This example runs on APM32F407 MINI Devices.
