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    1չʾ USB U 豸

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    /* Ӳ̶ӦĿӲƽ̨ */
    壺N32L43XM-STB N32L40XM-STB V1.1

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    /* ģ÷:ʱӣI/O */
    SystemClock48MHz
    USB Clock48MHz
    GPIO:   LED:D1--PA8D2--PB4
    ־  USART1: TX--PA9  RX--PA10    ʣ115200


    /* DemoĲԲ */
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    2.ͨ USB  J3 USB ڣUSB ɺ󣬵ʶһỤʽԴU

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1. Function description
    This routine shows USB U disk device

2. Use environment
    Hardware environment: development hardware platform corresponding to the project 
    Development board:      N32L43XM-STB N32L40XM-STB V1.1

3. Instructions for use
    Describe the configuration method of related modules; for example: clock, I/O, etc. 
        1. SystemClock: 48MHz
        2. USB Clock48MHz
        3. GPIO:   LED:D1--PA8D2--PB4
        LOG: USART1: TX--PA9 RX--PA10 Baud rate: 115200

    Describe the test steps and phenomena of Demo 
        1. After compiling, download the program to reset and run;
        2. After the USB cable J3 connection port, the USB mount is completed, the computer identifies a U disk, open the U disk after formatting

4. Matters needing attention
    None.