int main(void)
{
    int i;
    static unsigned char data_number = 0;
    
    system_clock.initialize();//ϵͳʱÖÓ³õʼ»¯
    led.initialize();         //LED³õʼ»¯
    
    USBD_Init(&USB_OTG_dev,
        USB_OTG_HS_CORE_ID,
        &USR_desc,
        &USBD_CDC_cb,
        &USR_cb);
    
    while(State==0);
    LED_GREEN_ON;
    while(1)
    {
        //½ÓÊÕÊý¾Ý²¢´¦Àí
        if(USB_ReceivedCount > 0){

            LED_RED_ON;    

            USB_ReceivedCount = 0;
            //Öظ´·¢ËÍ´ÎÊý
            data_number = USB_Rx_Buffer[0];
            //·¢ËÍͼƬ
            do{
                USB_StatusDataSended = 0;
                DCD_EP_Tx(&USB_OTG_dev,CDC_IN_EP,gImage_flower,sizeof(gImage_flower));
                while(USB_StatusDataSended == 0){
                    for(i = 0;i < 10000;i++);
                }
                data_number--;
            }while(data_number > 0);

            LED_RED_OFF;
        }
    }        
}