CH573F的usb hid設(shè)備例程，如果程序不循環(huán)發(fā)數(shù)據(jù)，usb好像就進(jìn)入休眠狀態(tài)，電腦給端點1發(fā)數(shù)據(jù)就會失敗，我周期調(diào)用DevWakeup，喚醒主機(jī)也不行，如果芯片不周期主動發(fā)送數(shù)據(jù)，該怎么使usb設(shè)備通信正常

int?main()
{
????uint8_t?s;
????SetSysClock(CLK_SOURCE_PLL_60MHz);
????DebugInit();????????//配置串口1用來prinft來debug
????printf("start\n");
????pEP0_RAM_Addr?=?EP0_Databuf;????//配置緩存區(qū)64字節(jié)。
????pEP1_RAM_Addr?=?EP1_Databuf;
????USB_DeviceInit();
????PFIC_EnableIRQ(USB_IRQn);???????//啟用中斷向量
????mDelaymS(100);
????while(1)
????{//模擬傳輸4個字節(jié)的數(shù)據(jù)，實際傳輸根據(jù)用戶需要自行修改
???????/*?if(Ready)
????????{
????????????Ready?=?0;
????????????DevHIDReport(0x05,?0x10,?0x20,?0x11);
????????}
????????mDelaymS(100);
????????if(Ready)
????????{
????????????Ready?=?0;
????????????DevHIDReport(0x0A,?0x15,?0x25,?0x22);
????????}
????????mDelaymS(100);
????????if(Ready)
????????{
????????????Ready?=?0;
????????????DevHIDReport(0x0E,?0x1A,?0x2A,?0x44);
????????}
????????mDelaymS(100);
*/
????????if(Ready)
????????{
????????????Ready?=?0;
????????????DevHIDReport(0x10,?0x1E,?0x2E,?0x88);
????????}
????????mDelaymS(100);
????}
}