/*
    FreeRTOS V6.0.0 - Copyright (C) 2009 Real Time Engineers Ltd.

    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it    under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation and modified by the FreeRTOS exception.
    **NOTE** The exception to the GPL is included to allow you to distribute a
    combined work that includes FreeRTOS without being obliged to provide the
    source code for proprietary components outside of the FreeRTOS kernel.
    Alternative commercial license and support terms are also available upon
    request.  See the licensing section of http://www.FreeRTOS.org for full
    license details.

    FreeRTOS is distributed in the hope that it will be useful,    but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
    more details.

    You should have received a copy of the GNU General Public License along
    with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
    Temple Place, Suite 330, Boston, MA  02111-1307  USA.


    ***************************************************************************
    *                                                                         *
    * The FreeRTOS eBook and reference manual are available to purchase for a *
    * small fee. Help yourself get started quickly while also helping the     *
    * FreeRTOS project! See http://www.FreeRTOS.org/Documentation for details *
    *                                                                         *
    ***************************************************************************

    1 tab == 4 spaces!

    Please ensure to read the configuration and relevant port sections of the
    online documentation.

    http://www.FreeRTOS.org - Documentation, latest information, license and
    contact details.

    http://www.SafeRTOS.com - A version that is certified for use in safety
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    http://www.OpenRTOS.com - Commercial support, development, porting,
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*/


/* Task that controls the uIP TCP/IP stack. */


/* Standard includes. */
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"

/* uip includes. */
#include "uip.h"
#include "uip_arp.h"
#include "httpd.h"
#include "timer.h"
#include "clock-arch.h"

/* Demo includes. */
#include "FEC.h"
#include "partest.h"


/*-----------------------------------------------------------*/

/* Shortcut to the header within the Rx buffer. */
#define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])

/*-----------------------------------------------------------*/

/*
 * Port functions required by the uIP stack.
 */
void clock_init( void );
clock_time_t clock_time( void );
extern void timer_set(struct timer *t, clock_time_t interval);
extern int timer_expired(struct timer *t);
extern void timer_reset(struct timer *t);

/*-----------------------------------------------------------*/

/* The semaphore used by the ISR to wake the uIP task. */
extern xSemaphoreHandle xFECSemaphore;

/*-----------------------------------------------------------*/

void clock_init(void)
{
	/* This is done when the scheduler starts. */
}
/*-----------------------------------------------------------*/

/* Define clock functions here to avoid header file name clash between uIP
and the Luminary Micro driver library. */
clock_time_t clock_time( void )
{
	return xTaskGetTickCount();
}
/*-----------------------------------------------------------*/

void vuIP_Task( void *pvParameters )
{
portBASE_TYPE i;
uip_ipaddr_t xIPAddr;
struct timer periodic_timer, arp_timer;

	/* To prevent compiler warnings. */
	( void ) pvParameters;

	/* Initialise the uIP stack. */
	timer_set( &periodic_timer, configTICK_RATE_HZ / 2 );
	timer_set( &arp_timer, configTICK_RATE_HZ * 10 );
	uip_init();
	uip_ipaddr( xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
	uip_sethostaddr( xIPAddr );

	/* Initialise the WEB server. */
	httpd_init();

	/* Initialise the Ethernet controller peripheral. */
	vFECInit();

	for( ;; )
	{
		/* Is there received data ready to be processed? */
		uip_len = usFECGetRxedData();

		if( uip_len > 0 )
		{
			/* Standard uIP loop taken from the uIP manual. */

			if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
			{
				uip_arp_ipin();
				uip_input();

				/* If the above function invocation resulted in data that
				should be sent out on the network, the global variable
				uip_len is set to a value > 0. */
				if( uip_len > 0 )
				{
					uip_arp_out();
					vFECSendData();
				}
				else
				{
					/* If we are not sending data then let the FEC driver know
					the buffer is no longer required. */
					vFECRxProcessingCompleted();
				}
			}
			else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
			{
				uip_arp_arpin();

				/* If the above function invocation resulted in data that
				should be sent out on the network, the global variable
				uip_len is set to a value > 0. */
				if( uip_len > 0 )
				{
					vFECSendData();
				}
				else
				{
					/* If we are not sending data then let the FEC driver know
					the buffer is no longer required. */
					vFECRxProcessingCompleted();
				}
			}
			else
			{
				/* If we are not sending data then let the FEC driver know
				the buffer is no longer required. */
				vFECRxProcessingCompleted();
			}
		}
		else
		{
			if( timer_expired( &periodic_timer ) )
			{
				timer_reset( &periodic_timer );
				for( i = 0; i < UIP_CONNS; i++ )
				{
					uip_periodic( i );

					/* If the above function invocation resulted in data that
					should be sent out on the network, the global variable
					uip_len is set to a value > 0. */
					if( uip_len > 0 )
					{
						uip_arp_out();
						vFECSendData();
					}
				}

				/* Call the ARP timer function every 10 seconds. */
				if( timer_expired( &arp_timer ) )
				{
					timer_reset( &arp_timer );
					uip_arp_timer();
				}
			}
			else
			{
				/* We did not receive a packet, and there was no periodic
				processing to perform.  Block for a fixed period.  If a packet
				is received during this period we will be woken by the ISR
				giving us the Semaphore. */
				xSemaphoreTake( xFECSemaphore, configTICK_RATE_HZ / 2 );
			}
		}
	}
}
/*-----------------------------------------------------------*/