1˵

    òʾUSARTyUSARTzͨѯʶʵְ˫ģʽ
ͨš
    ȣUSARTyTxBuffer1USARTzUSARTzݴRxBuffer2
    USARTzTxBuffer2USARTyUSARTyݴRxBuffer1
    󣬷ֱȽ뷢ݣȽϽTransferStatus1
TransferStatus2
    USARTyUSARTzUSART1USART2


2ʹû

    KEIL MDK-ARM Professional Version 5.26.2.0

    ӲСϵͳN32G031C8L7-STB V1.0


3ʹ˵
	
    ϵͳʱ£
    - ʱԴ = HSI + PLL
    - ϵͳʱ = 48MHz
    
    USART£
    -  = 115200 baud
    - ֳ = 8λ
    - 1ֹͣλ
    - Уƽ
    - ӲƽãRTSCTSźţ
    - ͷʹ
    - ˫ģʽʹ
    
    USART£
    - USART1_Tx.PA9    <------->   USART2_Tx.PA2

    
    Բ
    - DemoKEIL±MCU
    - λкβ鿴TransferStatus1TransferStatus2У
      PASSEDΪͨFAILEDΪ쳣


4ע
    



1. Function description

    This test example demonstrates the basic communication between USARTy and USARTz by querying and detecting identifications in half-duplex mode.
    First, USARTy sends TxBuffer1 data to USARTz, and USARTz receives data and stores it in RxBuffer2.
    Subsequently, USARTz sends TxBuffer2 data to USARTy, and USARTy receives data to 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.
    USARTy and USARTz can be USART1 and USART2.


2. Use environment

    Software development environment: KEIL MDK-ARM Professional Version 5.26.2.0

    Hardware environment: minimum system board N32G031C8L7-STB V1.0


3. Instructions for use

    The system clock configuration is as follows:
    -Clock source = HSI + PLL
    -System clock = 48MHz
    
    The USART configuration is as follows:
    -Baud rate = 115200 baud
    -Word length = 8 data bits
    -1 stop bit
    -Verification control disabled
    -Hardware flow control disabled (RTS and CTS signals)
    -Receiver and transmitter enable
    -Half-duplex mode enabled
    
    The USART pin connections are as follows:
    -USART1_Tx.PA9 <-------> USART2_Tx.PA2

    
    Test steps and phenomena:
    -After the Demo is compiled in the KEIL environment, download it to the MCU
    -After resetting the operation, check the variables TransferStatus1 and TransferStatus2 in turn, among them,
      PASSED means the test passed, FAILED means the test is abnormal


4. Matters needing attention
    