/*
	FreeRTOS V5.4.2 - 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.


	***************************************************************************
	*                                                                         *
	* Looking for a quick start?  Then check out the FreeRTOS eBook!          *
	* 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
	critical systems.

	http://www.OpenRTOS.com - Commercial support, development, porting,
	licensing and training services.
*/
/* 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 "emac.h"
#include "partest.h"

/*-----------------------------------------------------------*/

/* MAC address configuration. */
#define uipMAC_ADDR0	0x00
#define uipMAC_ADDR1	0x12
#define uipMAC_ADDR2	0x13
#define uipMAC_ADDR3	0x10
#define uipMAC_ADDR4	0x15
#define uipMAC_ADDR5	0x11

/* IP address configuration. */
#define uipIP_ADDR0		192
#define uipIP_ADDR1		168
#define uipIP_ADDR2		0
#define uipIP_ADDR3		200	

/* How long to wait before attempting to connect the MAC again. */
#define uipINIT_WAIT    200

/* 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

/*-----------------------------------------------------------*/

/* 
 * Send the uIP buffer to the MAC. 
 */
static void prvENET_Send(void);

/*
 * Setup the MAC address in the MAC itself, and in the uIP stack.
 */
static void prvSetMACAddress( void );

/*
 * Port functions required by the uIP stack.
 */
void clock_init( void );
clock_time_t clock_time( void );

/*-----------------------------------------------------------*/

/* The semaphore used by the ISR to wake the uIP task. */
extern xSemaphoreHandle xEMACSemaphore;

/*-----------------------------------------------------------*/

void clock_init(void)
{
	/* This is done when the scheduler starts. */
}
/*-----------------------------------------------------------*/

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;
extern void ( vEMAC_ISR_Wrapper )( void );

	/* Create the semaphore used by the ISR to wake this task. */
	vSemaphoreCreateBinary( xEMACSemaphore );
	
	/* 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, uipIP_ADDR0, uipIP_ADDR1, uipIP_ADDR2, uipIP_ADDR3 );
	uip_sethostaddr( xIPAddr );
	httpd_init();

	/* Initialise the MAC. */
	while( Init_EMAC() != pdPASS )
    {
        vTaskDelay( uipINIT_WAIT );
    }

	portENTER_CRITICAL();
	{
        IntEnable = INT_RX_DONE;
        VICIntEnable |= 0x00200000;
        VICVectAddr21 = ( portLONG ) vEMAC_ISR_Wrapper;
		prvSetMACAddress();
	}
	portEXIT_CRITICAL();
	

	for( ;; )
	{
		/* Is there received data ready to be processed? */
		uip_len = uiGetEMACRxData( uip_buf );
		
		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();
					prvENET_Send();
				}
			}
			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 )
				{
					prvENET_Send();
				}
			}
		}
		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();
						prvENET_Send();
					}
				}	
	
				/* 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( xEMACSemaphore, configTICK_RATE_HZ / 2 );			
			}
		}
	}
}
/*-----------------------------------------------------------*/

static void prvENET_Send(void)
{
    RequestSend();

    /* Copy the header into the Tx buffer. */
    CopyToFrame_EMAC( uip_buf, uipTOTAL_FRAME_HEADER_SIZE );
    if( uip_len > uipTOTAL_FRAME_HEADER_SIZE )
    {
        CopyToFrame_EMAC( uip_appdata, ( uip_len - uipTOTAL_FRAME_HEADER_SIZE ) );
    }

    DoSend_EMAC( uip_len );

    RequestSend();

    /* Copy the header into the Tx buffer. */
    CopyToFrame_EMAC( uip_buf, uipTOTAL_FRAME_HEADER_SIZE );
    if( uip_len > uipTOTAL_FRAME_HEADER_SIZE )
    {
        CopyToFrame_EMAC( uip_appdata, ( uip_len - uipTOTAL_FRAME_HEADER_SIZE ) );
    }

    DoSend_EMAC( uip_len );
}
/*-----------------------------------------------------------*/

static void prvSetMACAddress( void )
{
struct uip_eth_addr xAddr;

	/* Configure the MAC address in the uIP stack. */
	xAddr.addr[ 0 ] = uipMAC_ADDR0;
	xAddr.addr[ 1 ] = uipMAC_ADDR1;
	xAddr.addr[ 2 ] = uipMAC_ADDR2;
	xAddr.addr[ 3 ] = uipMAC_ADDR3;
	xAddr.addr[ 4 ] = uipMAC_ADDR4;
	xAddr.addr[ 5 ] = uipMAC_ADDR5;
	uip_setethaddr( xAddr );
}
/*-----------------------------------------------------------*/

void vApplicationProcessFormInput( portCHAR *pcInputString, portBASE_TYPE xInputLength )
{
char *c, *pcText;
static portCHAR cMessageForDisplay[ 32 ];
extern xQueueHandle xLCDQueue;
xLCDMessage xLCDMessage;

	/* Process the form input sent by the IO page of the served HTML. */

	c = strstr( pcInputString, "?" );
    if( c )
    {
		/* Turn LED's on or off in accordance with the check box status. */
		if( strstr( c, "LED0=1" ) != NULL )
		{
			vParTestSetLED( 5, 0 );
		}
		else
		{
			vParTestSetLED( 5, 1 );
		}		
		
		if( strstr( c, "LED1=1" ) != NULL )
		{
			vParTestSetLED( 6, 0 );
		}
		else
		{
			vParTestSetLED( 6, 1 );
		}		

		if( strstr( c, "LED2=1" ) != NULL )
		{
			vParTestSetLED( 7, 0 );
		}
		else
		{
			vParTestSetLED( 7, 1 );
		}

		/* Find the start of the text to be displayed on the LCD. */
        pcText = strstr( c, "LCD=" );
        pcText += strlen( "LCD=" );

        /* Terminate the file name for further processing within uIP. */
        *c = 0x00;

        /* Terminate the LCD string. */
        c = strstr( pcText, " " );
        if( c != NULL )
        {
            *c = 0x00;
        }

        /* Add required spaces. */
        while( ( c = strstr( pcText, "+" ) ) != NULL )
        {
            *c = ' ';
        }
    
        /* Write the message to the LCD. */
		strcpy( cMessageForDisplay, pcText );
		xLCDMessage.xColumn = 0;
		xLCDMessage.pcMessage = cMessageForDisplay;
        xQueueSend( xLCDQueue, &xLCDMessage, portMAX_DELAY );
    }
}