// The main loop manages only the power mode
// because the USB management is done by interrupt
while(true)
{
if(udi_cdc_is_rx_ready())
{ // USB有数据送过来
/* 接收PC送来的数据 */
usbReveiveBytes = udi_cdc_get_nb_received_data();
memset(usbReceiveBuffer,0,200); // 缓冲区清零 udi_cdc_read_buf(usbReceiveBuffer,usbReveiveBytes);