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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了DMA从SRAM到SRAM传输数据的功能(SRAM和外设之间传输的样例请参考相关外设
样例工程)。

Function descriptions:
This example demonstrates the function of DMA transferring data from SRAM to
SRAM (please refer to the relevant peripheral sample project for the example
of transfer between SRAM and peripherals).
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测试环境：
测试用板：PY32F040EP_STK
MDK版本： 5.28
IAR版本： 9.20
GCC 版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32F040EP_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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使用步骤：
1. 编译下载程序到MCU，并运行；
2. LED灯常亮，表明DMA传输完成并且数据正确；
3. LED灯闪烁，表明DMA传输出错或者DMA的数据传输的不正确。

Example execution steps:
1. compile and download the program to MCU and run it;
2. The LED light is constantly on, indicating that DMA transmission is complete
and the data is correct;
3. The LED light flashes, indicating an error in DMA transmission or incorrect
data transmission from DMA.
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注意事项：
如果需要使用按键:
StartKit版本为V1.0,需将StartKit.h中的StartKitVersion 2 注释掉，并打开
StartKitVersion 1
StartKit版本为V1.0以上版本,则无需操作

Notes:
If you need to use buttons:
StartKit version is V1.0, please comment out StartKitVersion 2 in StartKit.h and 
open StartKitVersion 1
If the StartKit version is above V1.0, no operation is required

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