/*
    FreeRTOS V8.2.0rc1 - Copyright (C) 2014 Real Time Engineers Ltd.
    All rights reserved

    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    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.  Full license text is available on the following
    link: http://www.freertos.org/a00114.html

    1 tab == 4 spaces!

    ***************************************************************************
     *                                                                       *
     *    Having a problem?  Start by reading the FAQ "My application does   *
     *    not run, what could be wrong?".  Have you defined configASSERT()?  *
     *                                                                       *
     *    http://www.FreeRTOS.org/FAQHelp.html                               *
     *                                                                       *
    ***************************************************************************

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS provides completely free yet professionally developed,    *
     *    robust, strictly quality controlled, supported, and cross          *
     *    platform software that is more than just the market leader, it     *
     *    is the industry's de facto standard.                               *
     *                                                                       *
     *    Help yourself get started quickly while simultaneously helping     *
     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
     *    tutorial book, reference manual, or both:                          *
     *    http://www.FreeRTOS.org/Documentation                              *
     *                                                                       *
    ***************************************************************************

    ***************************************************************************
     *                                                                       *
     *   Investing in training allows your team to be as productive as       *
     *   possible as early as possible, lowering your overall development    *
     *   cost, and enabling you to bring a more robust product to market     *
     *   earlier than would otherwise be possible.  Richard Barry is both    *
     *   the architect and key author of FreeRTOS, and so also the world's   *
     *   leading authority on what is the world's most popular real time     *
     *   kernel for deeply embedded MCU designs.  Obtaining your training    *
     *   from Richard ensures your team will gain directly from his in-depth *
     *   product knowledge and years of usage experience.  Contact Real Time *
     *   Engineers Ltd to enquire about the FreeRTOS Masterclass, presented  *
     *   by Richard Barry:  http://www.FreeRTOS.org/contact
     *                                                                       *
    ***************************************************************************

    ***************************************************************************
     *                                                                       *
     *    You are receiving this top quality software for free.  Please play *
     *    fair and reciprocate by reporting any suspected issues and         *
     *    participating in the community forum:                              *
     *    http://www.FreeRTOS.org/support                                    *
     *                                                                       *
     *    Thank you!                                                         *
     *                                                                       *
    ***************************************************************************

    http://www.FreeRTOS.org - Documentation, books, training, latest versions,
    license and Real Time Engineers Ltd. contact details.

    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
    compatible FAT file system, and our tiny thread aware UDP/IP stack.

    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.

    http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
    licenses offer ticketed support, indemnification and commercial middleware.

    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
    engineered and independently SIL3 certified version for use in safety and
    mission critical applications that require provable dependability.

    1 tab == 4 spaces!
*/

/* Standard includes. */
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "timers.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 "emac.h"

/* Demo includes. */
#include "ParTest.h"

/* The buffer used by the uIP stack to both receive and send.  In this case,
because the Ethernet driver is implemented to be zero copy - the uip_buf
variable is just a pointer to an Ethernet buffer, and not a buffer in its own
right. */
extern unsigned char *uip_buf;

/* 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

/* The length of the queue used to send events from timers or the Ethernet
driver to the uIP stack. */
#define uipEVENT_QUEUE_LENGTH		10

/* A block time of zero simply means "don't block". */
#define uipDONT_BLOCK				0UL

/* Shortcut to the header within the Rx buffer. */
#define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])

/*-----------------------------------------------------------*/

/*
 * Setup the MAC address in the MAC itself, and in the uIP stack.
 */
static void prvSetMACAddress( void );

/*
 * Perform any uIP initialisation required to ready the stack for http
 * processing.
 */
static void prvInitialise_uIP( void );

/*
 * The callback function that is assigned to both the periodic timer and the
 * ARP timer.
 */
static void prvUIPTimerCallback( TimerHandle_t 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. */
QueueHandle_t xEMACEventQueue = NULL;

/*-----------------------------------------------------------*/

clock_time_t clock_time( void )
{
	return xTaskGetTickCount();
}
/*-----------------------------------------------------------*/

void vuIP_Task( void *pvParameters )
{
long i;
unsigned long ulNewEvent = 0UL, ulUIP_Events = 0UL;
unsigned short usPacketLength;

	/* Just to prevent compiler warnings about the unused parameter. */
	( void ) pvParameters;

	/* Initialise the uIP stack, configuring for web server usage. */
	prvInitialise_uIP();

	/* Initialise the MAC and PHY. */
	vEMACInit();

	for( ;; )
	{
		/* Is there received data ready to be processed? */
		usPacketLength = usEMACRead();

		/* Statements to be executed if data has been received on the Ethernet. */
		if( ( usPacketLength > 0U ) && ( uip_buf != NULL ) )
		{
			uip_len = usPacketLength;

			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
		{
			/* Clear the RX event latched in ulUIP_Events - if one was latched. */
			ulUIP_Events &= ~uipETHERNET_RX_EVENT;
		}

		/* Statements to be executed if the TCP/IP period timer has expired. */
		if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )
		{
			ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;

			if( uip_buf != NULL )
			{
				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();
					}
				}
			}
		}

		/* Statements to be executed if the ARP timer has expired. */
		if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )
		{
			ulUIP_Events &= ~uipARP_TIMER_EVENT;
			uip_arp_timer();
		}

		/* If all latched events have been cleared - block until another event
		occurs. */
		if( ulUIP_Events == pdFALSE )
		{
			xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );
			ulUIP_Events |= ulNewEvent;
		}
	}
}
/*-----------------------------------------------------------*/

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 );
}
/*-----------------------------------------------------------*/

static void prvInitialise_uIP( void )
{
uip_ipaddr_t xIPAddr;
TimerHandle_t xARPTimer, xPeriodicTimer;

	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( uipEVENT_QUEUE_LENGTH, sizeof( unsigned long ) );

	/* Create and start the uIP timers. */
	xARPTimer = xTimerCreate( 	"ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */
								( 10000UL / portTICK_PERIOD_MS ), /* Timer period. */
								pdTRUE, /* Autor-reload. */
								( void * ) uipARP_TIMER,
								prvUIPTimerCallback
							);

	xPeriodicTimer = xTimerCreate( 	"PeriodicTimer",
									( 500UL / portTICK_PERIOD_MS ),
									pdTRUE, /* Autor-reload. */
									( void * ) uipPERIODIC_TIMER,
									prvUIPTimerCallback
								);

	/* Sanity check that the timers were indeed created. */
	configASSERT( xARPTimer );
	configASSERT( xPeriodicTimer );
	configASSERT( xEMACEventQueue );

	/* These commands will block indefinitely until they succeed, so there is
	no point in checking their return values. */
	xTimerStart( xARPTimer, portMAX_DELAY );
	xTimerStart( xPeriodicTimer, portMAX_DELAY );
}
/*-----------------------------------------------------------*/

static void prvUIPTimerCallback( TimerHandle_t 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.  As this callback is assigned to both the ARP and Periodic timers, the
	first thing to do is ascertain which timer it was that actually expired. */
	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;
	}
}
/*-----------------------------------------------------------*/

void vApplicationProcessFormInput( char *pcInputString )
{
char *c;
const unsigned long ulYellowLED = 2UL;

	/* 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 LEDs on or off in accordance with the check box status. */
			if( strstr( c, "LED0=1" ) != NULL )
			{
				/* Turn the LEDs on. */
				vParTestSetLED( ulYellowLED, pdTRUE );
			}
			else
			{
				/* Turn the LEDs off. */
				vParTestSetLED( ulYellowLED, pdFALSE );
			}
	    }
		else
		{
			/* Some browsers will only imply that a check box is off. */
			vParTestSetLED( ulYellowLED, pdFALSE );
		}
	}
}
/*-----------------------------------------------------------*/