1. ˵
    չʾ USB U 豸

2. ʹû
    Ӳ̶ӦĿӲƽ̨ 
    壺   N32G457QEL_EVB V1.1

3. ʹ˵
    ģ÷:ʱӣI/O 
         1. SystemClock144MHz 
         2. USB Clock48MHz
         3. GPIOUSART1TX--PA9  RX--PA10ʣ115200

    DemoĲԲ 
         1. سλ
         2. ͨ USB ӿڣUSB ɺ󣬵ʶһỤʽԴU

4. ע
    

1. Function description
    This routine shows USB U disk device

2. Use environment
    Hardware environment: development hardware platform corresponding to the project 
    Development board:      N32G457QEL_EVB V1.1

3. Instructions for use
    Describe the configuration method of related modules; for example: clock, I/O, etc. 
        1. SystemClock: 144MHz
        2. USB Clock: 48MHz
        3. GPIO: 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 connection port, the USB mount is completed, the computer identifies a U disk, open the U disk after formatting

4. Matters needing attention
    None.