5509ausb.txt

来自「5509A DSP USB 开发框架程序」· 文本 代码 · 共 35 行

Uint16 Request;
USB_REQUEST_RET ReqHandlerRet = USB_REQUEST_DONE;
USB_EVENT_MASK USB_ctl_events;

USB_ctl_events = (USB_getEvents(hEp0Out) | USB_getEvents(hEp0In));

//Match with the appropriate EVENT
if(USB_ctl_events & USB_EVENT_RESET) // USB RESET event received
{
USB_abortAllTransaction(DevNum); // stop all data transfer activities
usbCurConfigStat = 0x00; // reset device config number
usbCurAltSetStat = 0x00; // reset Alt Setting number 
USB_init(USB0, myUsbConfig, 0x80); // reconfig the USB module
}

if(USB_ctl_events & USB_EVENT_SUSPEND) //USB suspend
{
//add code here to deal with suspend

}

if((USB_ctl_events & USB_EVENT_SETUP) == USB_EVENT_SETUP) 
{

if(USB_getSetupPacket(DevNum,&USB_Setup) == USB_FALSE)
{
//stall the control pipe
ReqHandlerRet = USB_REQUEST_STALL;
}
//decode the setup packet 
else 
{
// unpacket the setup packet
}