//*****************************************************************************
//
// Calls the USB host stack tick function.
//
// This function is called periodically to allow the USB host stack to
// process any outstanding items.
//
// \return None.
//
//*****************************************************************************
void
ScopeUSBHostTick(void)
{
tBoolean bRetcode;
//
// Call the stack to allow it to perform any processing needing done.
//
USBHCDMain();
//
// See if we need to do anything here.
//
if(g_eState == STATE_DEVICE_ENUM)
{
//
// The device is available. Try to open its root directory just
// to make sure it is accessible.
//
bRetcode = FileIsDrivePresent(1);
if(bRetcode)
{
//
// The USB drive is accessible so dump a message and set the state
// to indicate that the device is ready for use.
//
UARTprintf("Opened root directory - USB drive present.\n");
RendererSetAlert("USB drive\ndetected.", 200);
g_eState = STATE_DEVICE_READY;
}
}
}
//*****************************************************************************
//
// Calls the USB host stack tick function.
//
// This function is called periodically to allow the USB host stack to
// process any outstanding items.
//
// \return None.
//
//*****************************************************************************
void
ScopeUSBHostTick(void)
{
tBoolean bRetcode;
//
// Call the stack to allow it to perform any processing needing done.
//
USBHCDMain();
//
// See if we need to do anything here.
//
if(g_eState == STATE_DEVICE_ENUM)
{
//
// Take it easy on the Mass storage device if it is slow to
// start up after connecting.
//
if(USBHMSCDriveReady(g_ulMSCInstance) != 0)
{
//
// Wait about 500ms before attempting to check if the
// device is ready again.
//
SysCtlDelay(SysCtlClockGet()/(3*2));
}
else
{
//
// The device is available. Try to open its root directory just
// to make sure it is accessible.
//
bRetcode = FileIsDrivePresent(1);
if(bRetcode)
{
//
// The USB drive is accessible so dump a message and set the state
// to indicate that the device is ready for use.
//
UARTprintf("Opened root directory - USB drive present.\n");
RendererSetAlert("USB drive\ndetected.", 200);
g_eState = STATE_DEVICE_READY;
}
}
}
}
