/*
    FreeRTOS V7.3.0 - Copyright (C) 2012 Real Time Engineers Ltd.

    FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT 
    http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS tutorial books are available in pdf and paperback.        *
     *    Complete, revised, and edited pdf reference manuals are also       *
     *    available.                                                         *
     *                                                                       *
     *    Purchasing FreeRTOS documentation will not only help you, by       *
     *    ensuring you get running as quickly as possible and with an        *
     *    in-depth knowledge of how to use FreeRTOS, it will also help       *
     *    the FreeRTOS project to continue with its mission of providing     *
     *    professional grade, cross platform, de facto standard solutions    *
     *    for microcontrollers - completely free of charge!                  *
     *                                                                       *
     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
     *                                                                       *
     *    Thank you for using FreeRTOS, and thank you for your support!      *
     *                                                                       *
    ***************************************************************************


    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 modification 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.  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 and the FreeRTOS license exception along with FreeRTOS; if not it
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
    by writing to Richard Barry, contact details for whom are available on the
    FreeRTOS WEB site.

    1 tab == 4 spaces!
    
    ***************************************************************************
     *                                                                       *
     *    Having a problem?  Start by reading the FAQ "My application does   *
     *    not run, what could be wrong?"                                     *
     *                                                                       *
     *    http://www.FreeRTOS.org/FAQHelp.html                               *
     *                                                                       *
    ***************************************************************************

    
    http://www.FreeRTOS.org - Documentation, training, latest versions, license 
    and contact details.  
    
    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
    including FreeRTOS+Trace - an indispensable productivity tool.

    Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell 
    the code with commercial support, indemnification, and middleware, under 
    the OpenRTOS brand: http://www.OpenRTOS.com.  High Integrity Systems also
    provide a safety engineered and independently SIL3 certified version under 
    the SafeRTOS brand: http://www.SafeRTOS.com.
*/

/* Standard includes. */
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"
#include "queue.h"

/* uip includes. */
#include "net/uip.h"
#include "net/uip_arp.h"
#include "apps/httpd/httpd.h"
#include "sys/timer.h"
#include "net/clock-arch.h"
#include "r_ether.h"

/* Demo includes. */
#include "ParTest.h"

/*-----------------------------------------------------------*/

/* How long to wait before attempting to connect the MAC again. */
#define uipINIT_WAIT    ( 100 / portTICK_RATE_MS )

/* Shortcut to the header within the Rx buffer. */
#define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])

/* Standard constant. */
#define uipTOTAL_FRAME_HEADER_SIZE	54

/* The ARP timer and the periodic timer share a callback function, so the
respective timer IDs are used to determine which timer actually expired.  These
constants are assigned to the timer IDs. */
#define uipARP_TIMER				0
#define uipPERIODIC_TIMER			1

/* A block time of zero ticks simply means, "don't block". */
#define uipDONT_BLOCK				0UL

/*-----------------------------------------------------------*/

/*
 * Setup the MAC address in the MAC itself, and in the uIP stack.
 */
static void prvSetMACAddress( void );

/*
 * Perform any uIP initialisation necessary. 
 */
static void prvInitialise_uIP( void );

/*
 * The callback function that is assigned to both the periodic timer and the
 * ARP timer.
 */
static void prvUIPTimerCallback( xTimerHandle xTimer );

/*
 * Port functions required by the uIP stack.
 */
clock_time_t clock_time( void );

/*-----------------------------------------------------------*/

/* The queue used to send TCP/IP events to the uIP stack. */
xQueueHandle xEMACEventQueue = NULL;

/*-----------------------------------------------------------*/

clock_time_t clock_time( void )
{
	return xTaskGetTickCount();
}
/*-----------------------------------------------------------*/

void vuIP_Task( void *pvParameters )
{
portBASE_TYPE i;
unsigned long ulNewEvent = 0UL;
unsigned long ulUIP_Events = 0UL;

	( void ) pvParameters;
	
	/* Initialise the uIP stack. */
	prvInitialise_uIP();

	/* Initialise the MAC. */
	vInitEmac();

	while( lEMACWaitForLink() != pdPASS )
    {
        vTaskDelay( uipINIT_WAIT );
    }

	for( ;; )
	{
		if( ( ulUIP_Events & uipETHERNET_RX_EVENT ) != 0UL )
		{		
			/* Is there received data ready to be processed? */
			uip_len = ( unsigned short ) ulEMACRead();
			
			if( ( uip_len > 0 ) && ( uip_buf != NULL ) )
			{
				/* 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();
						vEMACWrite();
					}
				}
				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 )
					{
						vEMACWrite();
					}
				}
			}
			else
			{
				ulUIP_Events &= ~uipETHERNET_RX_EVENT;
			}
		}
		
		if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )
		{
			ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;
					
			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();
					vEMACWrite();
				}
			}
		}
		
		/* Call the ARP timer function every 10 seconds. */
		if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )
		{
			ulUIP_Events &= ~uipARP_TIMER_EVENT;
			uip_arp_timer();
		}
			
		if( ulUIP_Events == pdFALSE )
		{
			xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );
			ulUIP_Events |= ulNewEvent;
		}
	}
}
/*-----------------------------------------------------------*/

static void prvInitialise_uIP( void )
{
xTimerHandle xARPTimer, xPeriodicTimer;
uip_ipaddr_t xIPAddr;
const unsigned long ul_uIPEventQueueLength = 10UL;

	/* Initialise the uIP stack. */
	uip_init();
	uip_ipaddr( &xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
	uip_sethostaddr( &xIPAddr );
	uip_ipaddr( &xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
	uip_setnetmask( &xIPAddr );
	prvSetMACAddress();
	httpd_init();

	/* Create the queue used to sent TCP/IP events to the uIP stack. */
	xEMACEventQueue = xQueueCreate( ul_uIPEventQueueLength, sizeof( unsigned long ) );

	/* Create and start the uIP timers. */
	xARPTimer = xTimerCreate( 	( const signed char * const ) "ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */
								( 10000UL / portTICK_RATE_MS ), /* Timer period. */
								pdTRUE, /* Autor-reload. */
								( void * ) uipARP_TIMER,
								prvUIPTimerCallback
							);

	xPeriodicTimer = xTimerCreate( 	( const signed char * const ) "PeriodicTimer",
									( 50 / portTICK_RATE_MS ),
									pdTRUE, /* Autor-reload. */
									( void * ) uipPERIODIC_TIMER,
									prvUIPTimerCallback
								);

	configASSERT( xARPTimer );
	configASSERT( xPeriodicTimer );

	xTimerStart( xARPTimer, portMAX_DELAY );
	xTimerStart( xPeriodicTimer, portMAX_DELAY );
}
/*-----------------------------------------------------------*/

static void prvUIPTimerCallback( xTimerHandle xTimer )
{
static const unsigned long ulARPTimerExpired = uipARP_TIMER_EVENT;
static const unsigned long ulPeriodicTimerExpired = uipPERIODIC_TIMER_EVENT;

	/* This is a time callback, so calls to xQueueSend() must not attempt to
	block. */
	switch( ( int ) pvTimerGetTimerID( xTimer ) )
	{
		case uipARP_TIMER		:	xQueueSend( xEMACEventQueue, &ulARPTimerExpired, uipDONT_BLOCK );
									break;

		case uipPERIODIC_TIMER	:	xQueueSend( xEMACEventQueue, &ulPeriodicTimerExpired, uipDONT_BLOCK );
									break;

		default					:  	/* Should not get here. */
									break;
	}
}
/*-----------------------------------------------------------*/

static void prvSetMACAddress( void )
{
struct uip_eth_addr xAddr;

	/* Configure the MAC address in the uIP stack. */
	xAddr.addr[ 0 ] = configMAC_ADDR0;
	xAddr.addr[ 1 ] = configMAC_ADDR1;
	xAddr.addr[ 2 ] = configMAC_ADDR2;
	xAddr.addr[ 3 ] = configMAC_ADDR3;
	xAddr.addr[ 4 ] = configMAC_ADDR4;
	xAddr.addr[ 5 ] = configMAC_ADDR5;
	uip_setethaddr( xAddr );
}
/*-----------------------------------------------------------*/

void vApplicationProcessFormInput( char *pcInputString )
{
char *c;

	/* Only interested in processing form input if this is the IO page. */
	c = strstr( pcInputString, "io.shtml" );
	
	if( c )
	{
		/* Is there a command in the string? */
		c = strstr( pcInputString, "?" );
	    if( c )
	    {
			/* Turn the LED's on or off in accordance with the check box status. */
			if( strstr( c, "LED0=1" ) != NULL )
			{
				/* Turn the LEDs on. */
				vParTestSetLED( 7, 1 );
				vParTestSetLED( 8, 1 );
				vParTestSetLED( 9, 1 );
				vParTestSetLED( 10, 1 );
			}
			else
			{
				/* Turn the LEDs off. */
				vParTestSetLED( 7, 0 );
				vParTestSetLED( 8, 0 );
				vParTestSetLED( 9, 0 );
				vParTestSetLED( 10, 0 );
			}
	    }
		else
		{
			/* Commands to turn LEDs off are not always explicit. */
			vParTestSetLED( 7, 0 );
			vParTestSetLED( 8, 0 );
			vParTestSetLED( 9, 0 );
			vParTestSetLED( 10, 0 );
		}
	}
}