/***************************************************************************//**
* @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;
}
