/*!
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.0
 *
 * @date        2023-03-25
 *
 * @attention
 *
 *  Copyright (C) 2023 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

The example provides a description of how to reconfigure the DMA transfer 
number in discontinuous mode, when use DMA channel3 to transfer data from
RAM memory to USART1 transmit data register.The start of transfer is triggered 
by software. If the DMA transfer operation is finished correctly, data stored array
DataBuffer[] will be transfered to a serial port tool by USART1 and LED2 toggles.
When the USER key is pressed, the DMA transfer number is reconfigured and DMA 
transmission is restarted.

Press KEY1, DMA will reload.
The data is displayed on serial assistant through USART1.

&par Hardware Description

The USART1 is configured as follows:
    - USART1 TX:PA9, RX:PA10, USART2 TX:PA2, RX:PA3
    - 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

  - DMA/DMA_ReloadExti/src/apm32a10x_int.c     Interrupt handlers
  - DMA/DMA_ReloadExti/src/main.c              Main program

&par IDE environment

  - MDK-ARM V5.36
  - EWARM V8.50.5.26295
  - ECLIPSE V4.27

&par Hardware and Software environment

  - This example runs on APM32A103_MINI Devices.
