//*****************************************************************************
//
// This is the callback from the MSC driver.
//
// \param ulInstance is the driver instance which is needed when communicating
// with the driver.
// \param ulEvent is one of the events defined by the driver.
// \param pvData is a pointer to data passed into the initial call to register
// the callback.
//
// This function handles callback events from the MSC driver. The only events
// currently handled are the MSC_EVENT_OPEN and MSC_EVENT_CLOSE. This allows
// the main routine to know when an MSC device has been detected and
// enumerated and when an MSC device has been removed from the system.
//
// \return Returns \e true on success or \e false on failure.
//
//*****************************************************************************
void
MSCCallback(unsigned long ulInstance, unsigned long ulEvent, void *pvData)
{
//
// Determine the event.
//
switch(ulEvent)
{
//
// Called when the device driver has successfully enumerated an MSC
// device.
//
case MSC_EVENT_OPEN:
{
//
// Mount the USB flash stick as logical drive 1 in the file system.
//
FileMountUSB(true);
//
// Proceed to the enumeration state.
//
g_eState = STATE_DEVICE_ENUM;
break;
}
//
// Called when the device driver has been unloaded due to error or
// the device is no longer present.
//
case MSC_EVENT_CLOSE:
{
//
// Remove the USB stick from the file system.
//
FileMountUSB(false);
//
// Close our MSC drive instance.
//
USBHMSCDriveClose(g_ulMSCInstance);
g_ulMSCInstance = 0;
//
// Go back to the "no device" state and wait for a new connection.
//
g_eState = STATE_NO_DEVICE;
RendererSetAlert("USB drive\nremoved.", 200);
break;
}
default:
{
break;
}
}
}
//*****************************************************************************
//
// Clean up and release all USB hardware resources.
//
//*****************************************************************************
void
ScopeUSBHostTerm(void)
{
//
// If necessary, unmount the USB flash drive.
//
if((g_eState == STATE_DEVICE_ENUM) || (g_eState == STATE_DEVICE_READY))
{
FileMountUSB(false);
}
//
// Nothing is connected any more.
//
g_eState = STATE_NO_DEVICE;
//
// Close our MSC drive instance.
//
USBHMSCDriveClose(g_ulMSCInstance);
g_ulMSCInstance = 0;
//
// Tell the USB library that we are finished using the host controller.
//
USBHCDTerm(0);
}
//*****************************************************************************
//
// Clean up and release all USB hardware resources.
//
//*****************************************************************************
void
ScopeUSBHostTerm(void)
{
//
// If necessary, unmount the USB flash drive.
//
if((g_eState == STATE_DEVICE_ENUM) || (g_eState == STATE_DEVICE_READY))
{
FileMountUSB(false);
}
//
// Nothing is connected any more.
//
g_eState = STATE_NO_DEVICE;
//
// Close our MSC drive instance.
//
USBHMSCDriveClose(g_ulMSCInstance);
g_ulMSCInstance = 0;
//
// Tell the USB library that we are finished using the host controller.
//
USBHCDTerm(0);
//
// Turn off USB Phy clock.
//
SysCtlUSBPLLDisable();
//
// Disable the USB peripheral
//
SysCtlPeripheralDisable(SYSCTL_PERIPH_USB0);
}