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/*
FreeRTOS V9.0.0rc1 - Copyright (C) 2016 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
***************************************************************************
* *
* 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 *
* *
***************************************************************************
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
the FAQ page "My application does not run, what could be wrong?". Have you
defined configASSERT()?
http://www.FreeRTOS.org/support - In return for receiving this top quality
embedded software for free we request you assist our global community by
participating in the support forum.
http://www.FreeRTOS.org/training - Investing in training allows your team to
be as productive as possible as early as possible. Now you can receive
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
Ltd, and the world's leading authority on the world's leading RTOS.
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!
*/
/*
* Very simple task that responds with a single WEB page to http requests.
*
* The WEB page displays task and system status. A semaphore is used to
* wake the task when there is processing to perform as determined by the
* interrupts generated by the Ethernet interface.
*/
/* Standard includes. */
#include <string.h>
#include <stdio.h>
/* Tern includes. */
#include "utils\system_common.h"
#include "i2chip_hw.h"
#include "socket.h"
/* FreeRTOS.org includes. */
#include <FreeRTOS.h>
#include <task.h>
#include <semphr.h>
/* The standard http port on which we are going to listen. */
#define httpPORT 80
#define httpTX_WAIT 2
/* Network address configuration. */
const unsigned char ucMacAddress[] = { 12, 128, 12, 34, 56, 78 };
const unsigned char ucGatewayAddress[] = { 192, 168, 2, 1 };
const unsigned char ucIPAddress[] = { 172, 25, 218, 210 };
const unsigned char ucSubnetMask[] = { 255, 255, 255, 0 };
/* The number of sockets this task is going to handle. */
#define httpSOCKET_NUM 3
unsigned char ucConnection[ httpSOCKET_NUM ];
/* The maximum data buffer size we can handle. */
#define httpSOCKET_BUFFER_SIZE 2048
/* Standard HTTP response. */
#define httpOUTPUT_OK "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"
/* Hard coded HTML components. Other data is generated dynamically. */
#define HTML_OUTPUT_BEGIN "\
<HTML><head><meta http-equiv=\"Refresh\" content=\"1\;url=index.htm\"></head>\
<BODY bgcolor=\"#CCCCFF\"><font face=\"arial\"><H2>FreeRTOS.org<sup>tm</sup> + Tern E-Engine<sup>tm</sup></H2>\
<a href=\"http:\/\/www.FreeRTOS.org\">FreeRTOS.org Homepage</a><P>\
<HR>Task status table:\r\n\
<p><font face=\"courier\"><pre>Task State Priority Stack #<br>\
************************************************<br>"
#define HTML_OUTPUT_END "\
</font></BODY></HTML>"
/*-----------------------------------------------------------*/
/*
* Initialise the data structures used to hold the socket status.
*/
static void prvHTTPInit( void );
/*
* Setup the Ethernet interface with the network addressing information.
*/
static void prvNetifInit( void );
/*
* Generate the dynamic components of the served WEB page and transmit the
* entire page through the socket.
*/
static void prvTransmitHTTP( unsigned char socket );
/*-----------------------------------------------------------*/
/* This variable is simply incremented by the idle task hook so the number of
iterations the idle task has performed can be displayed as part of the served
page. */
unsigned long ulIdleLoops = 0UL;
/* Data buffer shared by sockets. */
unsigned char ucSocketBuffer[ httpSOCKET_BUFFER_SIZE ];
/* The semaphore used by the Ethernet ISR to signal that the task should wake
and process whatever caused the interrupt. */
SemaphoreHandle_t xTCPSemaphore = NULL;
/*-----------------------------------------------------------*/
void vHTTPTask( void * pvParameters )
{
short i, sLen;
unsigned char ucState;
( void ) pvParameters;
/* Create the semaphore used to communicate between this task and the
WIZnet ISR. */
vSemaphoreCreateBinary( xTCPSemaphore );
/* Make sure everything is setup before we start. */
prvNetifInit();
prvHTTPInit();
for( ;; )
{
/* Wait until the ISR tells us there is something to do. */
xSemaphoreTake( xTCPSemaphore, portMAX_DELAY );
/* Check each socket. */
for( i = 0; i < httpSOCKET_NUM; i++ )
{
ucState = select( i, SEL_CONTROL );
switch (ucState)
{
case SOCK_ESTABLISHED : /* new connection established. */
if( ( sLen = select( i, SEL_RECV ) ) > 0 )
{
if( sLen > httpSOCKET_BUFFER_SIZE )
{
sLen = httpSOCKET_BUFFER_SIZE;
}
disable();
sLen = recv( i, ucSocketBuffer, sLen );
if( ucConnection[ i ] == 1 )
{
/* This is our first time processing a HTTP
request on this connection. */
prvTransmitHTTP( i );
ucConnection[i] = 0;
}
enable();
}
break;
case SOCK_CLOSE_WAIT :
close(i);
break;
case SOCK_CLOSED :
ucConnection[i] = 1;
socket( i, SOCK_STREAM, 80, 0x00 );
NBlisten( i ); /* reinitialize socket. */
break;
}
}
}
}
/*-----------------------------------------------------------*/
static void prvHTTPInit( void )
{
unsigned char ucIndex;
/* There are 4 total sockets available; we will claim 3 for HTTP. */
for(ucIndex = 0; ucIndex < httpSOCKET_NUM; ucIndex++)
{
socket( ucIndex, SOCK_STREAM, httpPORT, 0x00 );
NBlisten( ucIndex );
ucConnection[ ucIndex ] = 1;
}
}
/*-----------------------------------------------------------*/
static void prvNetifInit( void )
{
i2chip_init();
initW3100A();
setMACAddr( ( unsigned char * ) ucMacAddress );
setgateway( ( unsigned char * ) ucGatewayAddress );
setsubmask( ( unsigned char * ) ucSubnetMask );
setIP( ( unsigned char * ) ucIPAddress );
/* See definition of 'sysinit' in socket.c
- 8 KB transmit buffer, and 8 KB receive buffer available. These buffers
are shared by all 4 channels.
- (0x55, 0x55) configures the send and receive buffers at
httpSOCKET_BUFFER_SIZE bytes for each of the 4 channels. */
sysinit( 0x55, 0x55 );
}
/*-----------------------------------------------------------*/
static void prvTransmitHTTP(unsigned char socket)
{
extern short usCheckStatus;
/* Send the http and html headers. */
send( socket, ( unsigned char * ) httpOUTPUT_OK, strlen( httpOUTPUT_OK ) );
send( socket, ( unsigned char * ) HTML_OUTPUT_BEGIN, strlen( HTML_OUTPUT_BEGIN ) );
/* Generate then send the table showing the status of each task. */
vTaskList( ( char * ) ucSocketBuffer );
send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
/* Send the number of times the idle task has looped. */
sprintf( ucSocketBuffer, "</pre></font><p><br>The idle task has looped 0x%08lx times<br>", ulIdleLoops );
send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
/* Send the tick count. */
sprintf( ucSocketBuffer, "The tick count is 0x%08lx<br>", xTaskGetTickCount() );
send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
/* Show a message indicating whether or not the check task has discovered
an error in any of the standard demo tasks. */
if( usCheckStatus == 0 )
{
sprintf( ucSocketBuffer, "No errors detected." );
send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
}
else
{
sprintf( ucSocketBuffer, "<font color=\"red\">An error has been detected in at least one task %x.</font><p>", usCheckStatus );
send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
}
/* Finish the page off. */
send( socket, (unsigned char*)HTML_OUTPUT_END, strlen(HTML_OUTPUT_END));
/* Must make sure the data is gone before closing the socket. */
while( !tx_empty( socket ) )
{
vTaskDelay( httpTX_WAIT );
}
close(socket);
}
/*-----------------------------------------------------------*/
void vApplicationIdleHook( void )
{
ulIdleLoops++;
}
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