/*
    FreeRTOS V7.5.3 - Copyright (C) 2013 Real Time Engineers Ltd. 
    All rights reserved

    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS provides completely free yet professionally developed,    *
     *    robust, strictly quality controlled, supported, and cross          *
     *    platform software that has become a de facto standard.             *
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     *    project by purchasing a FreeRTOS tutorial book, reference          *
     *    manual, or both from: http://www.FreeRTOS.org/Documentation        *
     *                                                                       *
     *    Thank you!                                                         *
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    ***************************************************************************

    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 from 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?"                                     *
     *                                                                       *
     *    http://www.FreeRTOS.org/FAQHelp.html                               *
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    ***************************************************************************

    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,
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    compatible FAT file system, and our tiny thread aware UDP/IP stack.

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    1 tab == 4 spaces!
*/
/* 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 );
    }
}