bool USER_USB_CALLBACK_EVENT_HANDLER(USB_EVENT event, void *pdata, uint16_t size)
{
switch( (int) event )
{
case EVENT_TRANSFER:
break;
case EVENT_SOF:
/* We are using the SOF as a timer to time the LED indicator. Call
* the LED update function here. */
APP_LEDUpdateUSBStatus();
APP_DeviceHIDDigitizerSOFHandler();
break;
case EVENT_SUSPEND:
/* Update the LED status for the suspend event. */
APP_LEDUpdateUSBStatus();
break;
case EVENT_RESUME:
/* Update the LED status for the resume event. */
APP_LEDUpdateUSBStatus();
break;
case EVENT_CONFIGURED:
/* When the device is configured, we can (re)initialize the
* demo code. */
APP_DeviceHIDDigitizerInitialize();
break;
case EVENT_SET_DESCRIPTOR:
break;
case EVENT_EP0_REQUEST:
/* We have received a non-standard USB request. The HID driver
* needs to check to see if the request was for it. */
USBCheckHIDRequest();
break;
case EVENT_BUS_ERROR:
break;
case EVENT_TRANSFER_TERMINATED:
break;
default:
break;
}
return true;
}
int main(void)
{
SYSTEM_Initialize(SYSTEM_STATE_USB_START);
LED_Initialize();
APP_KeyboardConfigure();
#ifdef WITH_HOS
HosCheckDFU(BOOT_FLAGS_VALUE & BOOT_WITH_APP);
if (!isUSBMode() || !isBusPowered()) {
HosMainLoop();
}
for (uint16_t i = 0; i < HOS_STARTUP_DELAY; ++i) {
if (HosSleep(HOS_TYPE_DEFAULT)) {
break;
}
__delay_ms(4);
}
#endif
USBDeviceInit();
USBDeviceAttach();
for (;;)
{
#ifdef WITH_HOS
if (!isBusPowered() || !isUSBMode()) {
Reset();
Nop();
Nop();
// NOT REACHED HERE
}
#endif
SYSTEM_Tasks();
#if defined(USB_POLLING)
/* Check bus status and service USB interrupts. Interrupt or polling
* method. If using polling, must call this function periodically.
* This function will take care of processing and responding to SETUP
* transactions (such as during the enumeration process when you first
* plug in). USB hosts require that USB devices should accept and
* process SETUP packets in a timely fashion. Therefore, when using
* polling, this function should be called regularly (such as once every
* 1.8ms or faster** [see inline code comments in usb_device.c for
* explanation when "or faster" applies]) In most cases, the
* USBDeviceTasks() function does not take very long to execute
* (ex: <100 instruction cycles) before it returns. */
USBDeviceTasks();
#endif
APP_LEDUpdateUSBStatus();
/* If the USB device isn't configured yet, we can't really do anything
* else since we don't have a host to talk to. So jump back to the
* top of the while loop. */
if (USBGetDeviceState() < CONFIGURED_STATE)
{
/* Jump back to the top of the while loop. */
continue;
}
/* If we are currently suspended, then we need to see if we need to
* issue a remote wakeup. In either case, we shouldn't process any
* keyboard commands since we aren't currently communicating to the host
* thus just continue back to the start of the while loop. */
if (USBIsDeviceSuspended())
{
//Check if we should assert a remote wakeup request to the USB host,
//when the user presses the pushbutton.
if (BUTTON_IsPressed())
{
USBCBSendResume(); //Does nothing unless we are in USB suspend with remote wakeup armed.
}
/* Jump back to the top of the while loop. */
continue;
}
if (USBIsBusSuspended())
{
/* Jump back to the top of the while loop. */
continue;
}
/* Run the keyboard tasks. */
APP_KeyboardTasks();
}//end while
}//end main
/*******************************************************************
* Function: bool USER_USB_CALLBACK_EVENT_HANDLER(
* USB_EVENT event, void *pdata, uint16_t size)
*
* PreCondition: None
*
* Input: USB_EVENT event - the type of event
* void *pdata - pointer to the event data
* uint16_t size - size of the event data
*
* Output: None
*
* Side Effects: None
*
* Overview: This function is called from the USB stack to
* notify a user application that a USB event
* occured. This callback is in interrupt context
* when the USB_INTERRUPT option is selected.
*
* Note: None
*******************************************************************/
bool USER_USB_CALLBACK_EVENT_HANDLER(USB_EVENT event, void *pdata, uint16_t size)
{
switch( (int) event )
{
case EVENT_TRANSFER:
break;
case EVENT_SOF:
/* We are using the SOF as a timer to time the LED indicator. Call
* the LED update function here. */
APP_LEDUpdateUSBStatus();
break;
case EVENT_SUSPEND:
/* Update the LED status for the suspend event. */
APP_LEDUpdateUSBStatus();
//Call the hardware platform specific handler for suspend events for
//possible further action (like optionally going reconfiguring the application
//for lower power states and going to sleep during the suspend event). This
//would normally be done in USB compliant bus powered applications, although
//no further processing is needed for purely self powered applications that
//don't consume power from the host.
SYSTEM_Initialize(SYSTEM_STATE_USB_SUSPEND);
break;
case EVENT_RESUME:
/* Update the LED status for the resume event. */
APP_LEDUpdateUSBStatus();
//Call the hardware platform specific resume from suspend handler (ex: to
//restore I/O pins to higher power states if they were changed during the
//preceding SYSTEM_Initialize(SYSTEM_STATE_USB_SUSPEND) call at the start
//of the suspend condition.
SYSTEM_Initialize(SYSTEM_STATE_USB_RESUME);
break;
case EVENT_CONFIGURED:
/* When the device is configured, we can (re)initialize the
* demo code. */
APP_DeviceCDCBasicDemoInitialize();
break;
case EVENT_SET_DESCRIPTOR:
break;
case EVENT_EP0_REQUEST:
/* We have received a non-standard USB request. The HID driver
* needs to check to see if the request was for it. */
USBCheckCDCRequest();
break;
case EVENT_BUS_ERROR:
break;
case EVENT_TRANSFER_TERMINATED:
break;
default:
break;
}
return true;
}
