1、功能说明

    该测例演示了USARTy与USARTz间通过查询检测标识，实现半双工模式的
基础通信。
    首先，USARTy发送TxBuffer1数据至USARTz，USARTz接收数据存至RxBuffer2。
    随后，USARTz发送TxBuffer2数据至USARTy，USARTy接收数据存至RxBuffer1。
    最后，分别比较两组接收数据与发送数据，比较结果存入TransferStatus1变量
和TransferStatus2变量。


2、使用环境

    软件开发环境：KEIL MDK-ARM V5.34
			     IAR EWARM 8.50.1 

    芯片支持：
        N32H730  
        N32H735   
        N32H735EC
        N32H760
        N32H762
        N32H765
        N32H765EC
        N32H785
        N32H785EC
        N32H787 
        

3、使用说明
	
    系统配置
        1、时钟源：HSI+PLL
        2、系统时钟频率：
            N32H760系列：    600MHz
    
    USART配置如下：
    - 波特率 = 115200 baud
    - 字长 = 8数据位
    - 1停止位
    - 校验控制禁用
    - 硬件流控制禁用（RTS和CTS信号）
    - 接收器和发送器使能
    - 半双工模式使能
    
    USART引脚连接如下：
    - USART3_Tx.PD8   <------->   UART9_Tx.PB9

    
    测试步骤与现象：
    - Demo在KEIL环境下编译后，下载至MCU
    - 复位运行,串口打印PASSED为测试通过，FAILED为测试异常。


4、注意事项


1. Function description

    This test example demonstrates the identification of USARTy and USARTz through query detection to realize the half-duplex communication.
    First, USARTy sends TxBuffer1 data to USARTz, and USARTz receives data and stores it in RxBuffer2.
    Then, USARTz sends TxBuffer2 data to USARTy, and USARTy receives data and stores it in RxBuffer1.
    Finally, compare the two groups of received data and sent data, respectively, and store the comparison results in the TransferStatus1 variable and the TransferStatus2 variable.


2. Development environment

    Software development environment: KEIL MDK-ARM V5.34
 			                                            IAR EWARM 8.50.1 
                                   
    Supported chips:
        N32H730  
        N32H735   
        N32H735EC
        N32H760
        N32H762
        N32H765
        N32H765EC
        N32H785
        N32H785EC
        N32H787        

3. How to use

    System Configuration:
        1. Clock source: HSI+PLL
        2. System Clock frequency: 
            N32H760 series:     600MHz
            

       USART is configured as follows:
    - Baud rate = 115200 baud
    - Word length = 8 data bits
    - 1 stop bit
    - checksum control disabled
    - Hardware flow control disabled (RTS and CTS signals)
    - Receiver and transmitter enable
    - Half-duplex mode enabled
    
    The USART pins are connected as follows:
    - USART3_Tx.PD8   <------->   UART9_Tx.PB9

    
    Test steps and phenomena:
    - Demo is compiled in KEIL environment and downloaded to MCU
    - Reset operation, the serial port prints PASSED to indicate that the test has passed, and FAILED to indicate that the test is abnormal.

4. Attention
    the MCU_TX and MCU_RX jumper cap of the development board NS-LINK needs to be disconnected first