void usbIrqHandler(void)
#endif
{
uint8_t statusCommon, statusIn, statusOut, indexSave;
#if SLAB_USB_HANDLER_CB
// Callback to user before processing
USBD_EnterHandler();
#endif
// Get the interrupt sources
statusCommon = USB_GetCommonInts();
statusIn = USB_GetInInts();
statusOut = USB_GetOutInts();
#if SLAB_USB_POLLED_MODE
if ((statusCommon == 0) && (statusIn == 0) && (statusOut == 0))
{
return;
}
#endif
// Save the current index
indexSave = USB_GetIndex();
// Check Common USB Interrupts
if (USB_IsSofIntActive(statusCommon))
{
#if SLAB_USB_SOF_CB
USBD_SofCb(USB_GetSofNumber());
#endif // SLAB_USB_SOF_CB
// Check for unhandled USB packets on EP0 and set the corresponding IN or
// OUT interrupt active flag if necessary.
if (((myUsbDevice.ep0.misc.bits.outPacketPending == true) && (myUsbDevice.ep0.state == D_EP_RECEIVING)) ||
((myUsbDevice.ep0.misc.bits.inPacketPending == true) && (myUsbDevice.ep0.state == D_EP_TRANSMITTING)))
{
USB_SetEp0IntActive(statusIn);
}
// Check for unhandled USB OUT packets and set the corresponding OUT
// interrupt active flag if necessary.
#if SLAB_USB_EP1OUT_USED
if ((myUsbDevice.ep1out.misc.bits.outPacketPending == true) && (myUsbDevice.ep1out.state == D_EP_RECEIVING))
{
USB_SetOut1IntActive(statusOut);
}
#endif
#if SLAB_USB_EP2OUT_USED
if ((myUsbDevice.ep2out.misc.bits.outPacketPending == true) && (myUsbDevice.ep2out.state == D_EP_RECEIVING))
{
USB_SetOut2IntActive(statusOut);
}
#endif
#if SLAB_USB_EP3OUT_USED
if ((myUsbDevice.ep3out.misc.bits.outPacketPending == true) && (myUsbDevice.ep3out.state == D_EP_RECEIVING))
{
USB_SetOut3IntActive(statusOut);
}
#endif
#if (SLAB_USB_EP3IN_USED && (SLAB_USB_EP3IN_TRANSFER_TYPE == USB_EPTYPE_ISOC))
if ((myUsbDevice.ep3in.misc.bits.inPacketPending == true) && (myUsbDevice.ep3in.state == D_EP_TRANSMITTING))
{
USB_SetIn3IntActive(statusIn);
}
#endif
}
if (USB_IsResetIntActive(statusCommon))
{
handleUsbResetInt();
// If VBUS is not present on detection of a USB reset, enter suspend mode.
#if (SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF)
if (USB_IsVbusOn() == false)
{
USB_SetSuspendIntActive(statusCommon);
}
#endif
}
if (USB_IsResumeIntActive(statusCommon))
{
handleUsbResumeInt();
}
if (USB_IsSuspendIntActive(statusCommon))
{
handleUsbSuspendInt();
}
#if SLAB_USB_EP3IN_USED
if (USB_IsIn3IntActive(statusIn))
{
handleUsbIn3Int();
}
#endif // EP3IN_USED
#if SLAB_USB_EP3OUT_USED
if (USB_IsOut3IntActive(statusOut))
{
handleUsbOut3Int();
}
#endif // EP3OUT_USED
#if SLAB_USB_EP2IN_USED
if (USB_IsIn2IntActive(statusIn))
{
handleUsbIn2Int();
}
#endif // EP2IN_USED
#if SLAB_USB_EP1IN_USED
if (USB_IsIn1IntActive(statusIn))
{
handleUsbIn1Int();
}
#endif // EP1IN_USED
#if SLAB_USB_EP2OUT_USED
if (USB_IsOut2IntActive(statusOut))
{
handleUsbOut2Int();
}
#endif // EP2OUT_USED
#if SLAB_USB_EP1OUT_USED
if (USB_IsOut1IntActive(statusOut))
{
handleUsbOut1Int();
}
#endif // EP1OUT_USED
// Check USB Endpoint 0 Interrupt
if (USB_IsEp0IntActive(statusIn))
{
handleUsbEp0Int();
}
// Restore index
USB_SetIndex(indexSave);
#if SLAB_USB_HANDLER_CB
// Callback to user before exiting
USBD_ExitHandler();
#endif
}
void USBD_Suspend(void)
{
uint8_t i;
bool regulatorEnabled, prefetchEnabled;
USB_SaveSfrPage();
// If the USB_PWRSAVE_MODE_ONVBUSOFF is enabled, we can enter suspend if VBUS
// is not present even if the USB has not detected a suspend event.
#if ((!(SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF)) || \
(SLAB_USB_BUS_POWERED))
if (USB_IsSuspended() == true)
#else
if ((USB_IsSuspended() == true) || (USB_IsVbusOn() == false))
#endif
{
USB_SuspendTransceiver();
#if SLAB_USB_FULL_SPEED
USB_SetSuspendClock();
#endif
// Get the state of the prefetch engine enable bit and disable the prefetch
// engine
prefetchEnabled = USB_IsPrefetchEnabled();
USB_DisablePrefetch();
// Get the state of the internal regulator before suspending it.
if (USB_IsRegulatorEnabled() == true)
{
regulatorEnabled = true;
#if (SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_FASTWAKE)
USB_SuspendRegulatorFastWake();
#else
USB_SuspendRegulator();
// Wait at least 12 clock instructions before halting the internal oscillator
for (i = 0; i < 3; i++)
{
}
#endif
}
else
{
regulatorEnabled = false;
}
do
{
USB_SuspendOscillator();
// When we arrive here, the device has waked from suspend mode.
#if SLAB_USB_REMOTE_WAKEUP_ENABLED
// If remote wakeup is enabled, query the application if the remote
// wakeup event occurred. If so, exit USBD_Suspend().
if (USB_IsSuspended() == true)
{
if (USBD_RemoteWakeupCb() == true)
{
break;
}
}
#endif
#if ((!(SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF)) && \
(SLAB_USB_BUS_POWERED == 0))
// If the USB_PWRSAVE_MODE_ONVBUSOFF mode is disabled, VBUS has been
// removed, so exit USBD_Suspend().
if (USB_IsVbusOn() == false)
{
break;
}
#endif
} while (USB_IsSuspended() == true);
// Restore the internal regulator
if (regulatorEnabled == true)
{
USB_UnsuspendRegulator();
}
// Restore the prefetch engine
if (prefetchEnabled == true)
{
USB_EnablePrefetch();
}
#if SLAB_USB_FULL_SPEED
// Restore the clock
USB_SetNormalClock();
#endif
USB_EnableTransceiver();
}
USB_RestoreSfrPage();
}
/***************************************************************************//**
* @brief Handles USB port reset interrupt
* @details After receiving a USB reset, halt all endpoints except for
* Endpoint 0, set the device state, and configure USB hardware.
******************************************************************************/
static void handleUsbResetInt(void)
{
// Setup EP0 to receive SETUP packets
myUsbDevice.ep0.state = D_EP_IDLE;
// Halt all other endpoints
#if SLAB_USB_EP1IN_USED
myUsbDevice.ep1in.state = D_EP_HALT;
#endif
#if SLAB_USB_EP2IN_USED
myUsbDevice.ep2in.state = D_EP_HALT;
#endif
#if SLAB_USB_EP3IN_USED
myUsbDevice.ep3in.state = D_EP_HALT;
#endif
#if SLAB_USB_EP1OUT_USED
myUsbDevice.ep1out.state = D_EP_HALT;
#endif
#if SLAB_USB_EP2OUT_USED
myUsbDevice.ep2out.state = D_EP_HALT;
#endif
#if SLAB_USB_EP3OUT_USED
myUsbDevice.ep3out.state = D_EP_HALT;
#endif
// After a USB reset, some USB hardware configurations will be reset and must
// be reconfigured.
// Re-enable clock recovery
#if SLAB_USB_CLOCK_RECOVERY_ENABLED
#if SLAB_USB_FULL_SPEED
USB_EnableFullSpeedClockRecovery();
#else
USB_EnableLowSpeedClockRecovery();
#endif
#endif
// Re-enable USB interrupts
USB_EnableSuspendDetection();
USB_EnableDeviceInts();
// If VBUS is preset, put the device in the Default state.
// Otherwise, put it in the Attached state.
//#if (!(SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF))
// If VBUS is preset, put the device in the Default state.
// Otherwise, put it in the Attached state.
// If the device is bus-powered, always put it in the Default state
#if (!(SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF) && !SLAB_USB_BUS_POWERED)
if (USB_IsVbusOn())
{
USBD_SetUsbState(USBD_STATE_DEFAULT);
}
else
{
USBD_SetUsbState(USBD_STATE_ATTACHED);
}
#else
USBD_SetUsbState(USBD_STATE_DEFAULT);
#endif // (!(SLAB_USB_PWRSAVE_MODE & USB_PWRSAVE_MODE_ONVBUSOFF))
#if SLAB_USB_RESET_CB
// Make the USB Reset Callback
USBD_ResetCb();
#endif
}
int8_t USBD_Init(const USBD_Init_TypeDef *p)
{
uint8_t i;
USB_SaveSfrPage();
USB_DisableInts();
// This forces the liner to bring in the contents efm8_usbdint
// It is place here since all users MUST call this function
// for the library to work properly
forceModuleLoad_usbint();
// Zero out the myUsbDevice struct, then initialize all non-zero members
for (i = 0; i < sizeof(myUsbDevice); i++)
{
*((uint8_t MEM_MODEL_SEG *)&myUsbDevice + i) = 0;
}
// Get the USB descriptors from p
myUsbDevice.deviceDescriptor = p->deviceDescriptor;
myUsbDevice.configDescriptor = (USB_ConfigurationDescriptor_TypeDef *)p->configDescriptor;
myUsbDevice.stringDescriptors = p->stringDescriptors;
myUsbDevice.numberOfStrings = p->numberOfStrings;
// Enable USB clock
#if SLAB_USB_FULL_SPEED
USB_SetClockIntOsc();
USB_SelectFullSpeed();
#else
USB_SetClockIntOscDiv8();
USB_SelectLowSpeed();
#endif // SLAB_USB_FULL_SPEED
// Enable or disable VBUS detection
#if SLAB_USB_BUS_POWERED
USB_VbusDetectDisable();
#else
USB_VbusDetectEnable();
#endif
USB_ForceReset();
USB_EnableDeviceInts();
USBD_Connect();
// If VBUS is present, the state should be Default.
// Otherwise, it is Attached.
#if SLAB_USB_BUS_POWERED
myUsbDevice.state = USBD_STATE_DEFAULT;
#else
if (USB_IsVbusOn())
{
myUsbDevice.state = USBD_STATE_DEFAULT;
}
else
{
myUsbDevice.state = USBD_STATE_ATTACHED;
}
#endif
// Only enable USB interrupts when not in polled mode
#if (SLAB_USB_POLLED_MODE == 0)
USB_EnableInts();
#endif
USB_RestoreSfrPage();
USB_DisableInhibit();
return USB_STATUS_OK;
}
