/*
	FreeRTOS.org V5.2.0 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

	FreeRTOS.org 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.

	FreeRTOS.org 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.org; if not, write to the Free Software Foundation, Inc., 59 
	Temple Place, Suite 330, Boston, MA  02111-1307  USA.

	A special exception to the GPL is included to allow you to distribute a 
	combined work that includes FreeRTOS.org without being obliged to provide
	the source code for any proprietary components.  See the licensing section
	of http://www.FreeRTOS.org for full details.


	***************************************************************************
	*                                                                         *
	* Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
	*                                                                         *
	***************************************************************************

	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 "hw_types.h"
#include "uip.h"
#include "uip_arp.h"
#include "httpd.h"
#include "timer.h"
#include "clock-arch.h"
#include "hw_ethernet.h"
#include "ethernet.h"
#include "hw_memmap.h"
#include "lmi_flash.h"
#include "sysctl.h"

/* Demo includes. */
#include "emac.h"
#include "partest.h"
#include "lcd_message.h"

struct timer {
  clock_time_t start;
  clock_time_t interval;
};


/*-----------------------------------------------------------*/

/* IP address configuration. */
#define uipIP_ADDR0		172
#define uipIP_ADDR1		25
#define uipIP_ADDR2		218
#define uipIP_ADDR3		19	

/* How long to wait before attempting to connect the MAC again. */
#define uipINIT_WAIT    100

/* 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. */
}
/*-----------------------------------------------------------*/

/* 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();
}
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);




void vuIP_Task( void *pvParameters )
{
portBASE_TYPE i;
uip_ipaddr_t xIPAddr;
struct timer periodic_timer, arp_timer;
extern void ( vEMAC_ISR )( void );

	/* Enable/Reset the Ethernet Controller */
	SysCtlPeripheralEnable( SYSCTL_PERIPH_ETH );
	SysCtlPeripheralReset( SYSCTL_PERIPH_ETH );

	/* 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();

	while( vInitEMAC() != pdPASS )
    {
        vTaskDelay( uipINIT_WAIT );
    }
	prvSetMACAddress();	
	

	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)
{
	vInitialiseSend();
	vIncrementTxLength( uip_len );
	vSendBufferToMAC();
}
/*-----------------------------------------------------------*/

static void prvSetMACAddress( void )
{
unsigned portLONG ulUser0, ulUser1;
unsigned char pucMACArray[8];
struct uip_eth_addr xAddr;

	/* Get the device MAC address from flash */
    FlashUserGet(&ulUser0, &ulUser1);

	/* Convert the MAC address from flash into sequence of bytes. */
    pucMACArray[0] = ((ulUser0 >>  0) & 0xff);
    pucMACArray[1] = ((ulUser0 >>  8) & 0xff);
    pucMACArray[2] = ((ulUser0 >> 16) & 0xff);
    pucMACArray[3] = ((ulUser1 >>  0) & 0xff);
    pucMACArray[4] = ((ulUser1 >>  8) & 0xff);
    pucMACArray[5] = ((ulUser1 >> 16) & 0xff);

	/* Program the MAC address. */
    EthernetMACAddrSet(ETH_BASE, pucMACArray);

	xAddr.addr[ 0 ] = pucMACArray[0];
	xAddr.addr[ 1 ] = pucMACArray[1];
	xAddr.addr[ 2 ] = pucMACArray[2];
	xAddr.addr[ 3 ] = pucMACArray[3];
	xAddr.addr[ 4 ] = pucMACArray[4];
	xAddr.addr[ 5 ] = pucMACArray[5];
	uip_setethaddr( xAddr );
}
/*-----------------------------------------------------------*/

void vApplicationProcessFormInput( portCHAR *pcInputString, portBASE_TYPE xInputLength )
{
char *c, *pcText;
static portCHAR cMessageForDisplay[ 32 ];
extern xQueueHandle xOLEDQueue;
xOLEDMessage xOLEDMessage;

	/* 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( 0, 1 );
		}
		else
		{
			vParTestSetLED( 0, 0 );
		}		
		
		/* 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 );
		xOLEDMessage.pcMessage = ( signed portCHAR * ) cMessageForDisplay;
        xQueueSend( xOLEDQueue, &xOLEDMessage, portMAX_DELAY );
    }
}