Example #1
0
/********************************************************************
 * Function:        void main(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        Main program entry point.
 *
 * Note:            None
 *******************************************************************/
MAIN_RETURN main(void)
{
    SYSTEM_Initialize(SYSTEM_STATE_USB_START);

    USBDeviceInit();
    USBDeviceAttach();
    setup();

    while(1)
    {
        SYSTEM_Tasks();

        #if defined(USB_POLLING)
            // 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

        //Application specific tasks
        APP_DeviceCDCBasicDemoTasks();

    }//end while
}//end main
Example #2
0
/********************************************************************
 * Function:        void main(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        Main program entry point.
 *
 * Note:            None
 *******************************************************************/
MAIN_RETURN main(void)
{
    SYSTEM_Initialize(SYSTEM_STATE_USB_START);

    USBDeviceInit();
    USBDeviceAttach();
    
    while(1)
    {
        SYSTEM_Tasks();

        #if defined(USB_POLLING)
            // 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


        /* 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()== true )
        {
            /* Jump back to the top of the while loop. */
            continue;
        }

        //Application specific tasks
        APP_DeviceCDCBasicDemoTasks();

    }//end while
}//end main