================================================================================
                                样例使用说明
                             Sample Description
================================================================================
功能描述：
此样例演示了UART1通过485中断发送接收功能，按下KYE_UP按键，485发送一个字符串并接收一个
字符串，LED1每隔1s翻转一次。

Function descriptions:
This example demonstrates UART1's function of sending and receiving interrupts 
through 485. By pressing the KYE.UP button, 485 sends a string and receives it
String, LED1 flips every 1 second..
================================================================================
测试环境：
测试用板：DPM32M087RBTx_EVB V1.0
MDK版本： 5.28

Test environment:
Test board: DPM32M087RBTx_EVB V1.0
MDK Version: 5.28
================================================================================
使用步骤：
1. 接上P10上的跳线帽，将串口0引出到CH340，USB线接电脑。
2. 接上P11上的跳线帽，将串口1引出到485芯片。
3. 编译下载程序到MCU，并运行。
4. 按下KEY_UP按键，485发送一个字符串并接收一个字符串。
5. LED1每隔1s翻转一次。

Example execution steps:
1. Connect the jumper cap on P10, connect serial port 0 to CH340, and connect 
the USB cable to the computer.
2. Compile and download the program to MCU, and run it.
3. Serial interrupt output string "Hello DPM32" Received, please reply.
4. After the output is completed, wait for 32 bytes to be received. After 
completion, print the string "UART receive successfully!".
5. LED1 flips every 1 second.
================================================================================
注意事项：
LED引脚如下：
LED1       -> PC10

UART引脚如下：
UART0_Tx   -> PA9
UART0_Rx   -> PA10

Notes:
The LED pins are as follows:
LED1       -> PC10

The UART pins are as follows:
UART0-Tx   -> PA9
UART0-Rx   -> PA10
================================================================================