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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [WizNET_DEMO_TERN_186/] [HTTPTask.c] - Blame information for rev 593

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1 585 jeremybenn
/*
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    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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    ***************************************************************************
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    *                                                                         *
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    * If you are:                                                             *
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    *                                                                         *
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    *    + New to FreeRTOS,                                                   *
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    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
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    *    + Looking for basic training,                                        *
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    *    + Wanting to improve your FreeRTOS skills and productivity           *
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    *                                                                         *
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    * then take a look at the FreeRTOS books - available as PDF or paperback  *
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    *                                                                         *
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    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
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    *                  http://www.FreeRTOS.org/Documentation                  *
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    *                                                                         *
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    * A pdf reference manual is also available.  Both are usually delivered   *
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    * to your inbox within 20 minutes to two hours when purchased between 8am *
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    * and 8pm GMT (although please allow up to 24 hours in case of            *
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    * exceptional circumstances).  Thank you for your support!                *
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    *                                                                         *
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    ***************************************************************************
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    This file is part of the FreeRTOS distribution.
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    FreeRTOS is free software; you can redistribute it and/or modify it under
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    the terms of the GNU General Public License (version 2) as published by the
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    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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    ***NOTE*** The exception to the GPL is included to allow you to distribute
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    a combined work that includes FreeRTOS without being obliged to provide the
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    source code for proprietary components outside of the FreeRTOS kernel.
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    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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    more details. You should have received a copy of the GNU General Public
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    License and the FreeRTOS license exception along with FreeRTOS; if not it
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    can be viewed here: http://www.freertos.org/a00114.html and also obtained
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    by writing to Richard Barry, contact details for whom are available on the
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    FreeRTOS WEB site.
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    1 tab == 4 spaces!
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    http://www.FreeRTOS.org - Documentation, latest information, license and
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    contact details.
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    http://www.SafeRTOS.com - A version that is certified for use in safety
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    critical systems.
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    http://www.OpenRTOS.com - Commercial support, development, porting,
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    licensing and training services.
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*/
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/*
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 * Very simple task that responds with a single WEB page to http requests.
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 *
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 * The WEB page displays task and system status.  A semaphore is used to
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 * wake the task when there is processing to perform as determined by the
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 * interrupts generated by the Ethernet interface.
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 */
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/* Standard includes. */
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#include <string.h>
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#include <stdio.h>
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/* Tern includes. */
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#include "utils\system_common.h"
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#include "i2chip_hw.h"
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#include "socket.h"
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/* FreeRTOS.org includes. */
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#include <FreeRTOS.h>
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#include <task.h>
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#include <semphr.h>
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/* The standard http port on which we are going to listen. */
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#define httpPORT 80
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#define httpTX_WAIT 2
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/* Network address configuration. */
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const unsigned char ucMacAddress[] =                    { 12, 128, 12, 34, 56, 78 };
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const unsigned char ucGatewayAddress[] =                { 192, 168, 2, 1 };
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const unsigned char ucIPAddress[] =                             { 172, 25, 218, 210 };
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const unsigned char ucSubnetMask[] =                    { 255, 255, 255, 0 };
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/* The number of sockets this task is going to handle. */
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#define httpSOCKET_NUM                       3
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unsigned char ucConnection[ httpSOCKET_NUM ];
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/* The maximum data buffer size we can handle. */
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#define httpSOCKET_BUFFER_SIZE  2048
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/* Standard HTTP response. */
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#define httpOUTPUT_OK   "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"
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/* Hard coded HTML components.  Other data is generated dynamically. */
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#define HTML_OUTPUT_BEGIN "\
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<HTML><head><meta http-equiv=\"Refresh\" content=\"1\;url=index.htm\"></head>\
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<BODY bgcolor=\"#CCCCFF\"><font face=\"arial\"><H2>FreeRTOS.org<sup>tm</sup> + Tern E-Engine<sup>tm</sup></H2>\
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<a href=\"http:\/\/www.FreeRTOS.org\">FreeRTOS.org Homepage</a><P>\
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<HR>Task status table:\r\n\
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<p><font face=\"courier\"><pre>Task          State  Priority  Stack     #<br>\
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************************************************<br>"
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#define HTML_OUTPUT_END   "\
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</font></BODY></HTML>"
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/*-----------------------------------------------------------*/
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/*
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 * Initialise the data structures used to hold the socket status.
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 */
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static void prvHTTPInit( void );
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/*
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 * Setup the Ethernet interface with the network addressing information.
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 */
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static void prvNetifInit( void );
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/*
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 * Generate the dynamic components of the served WEB page and transmit the
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 * entire page through the socket.
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 */
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static void prvTransmitHTTP( unsigned char socket );
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/*-----------------------------------------------------------*/
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/* This variable is simply incremented by the idle task hook so the number of
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iterations the idle task has performed can be displayed as part of the served
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page. */
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unsigned long ulIdleLoops = 0UL;
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/* Data buffer shared by sockets. */
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unsigned char ucSocketBuffer[ httpSOCKET_BUFFER_SIZE ];
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/* The semaphore used by the Ethernet ISR to signal that the task should wake
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and process whatever caused the interrupt. */
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xSemaphoreHandle xTCPSemaphore = NULL;
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/*-----------------------------------------------------------*/
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void vHTTPTask( void * pvParameters )
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{
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short i, sLen;
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unsigned char ucState;
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        ( void ) pvParameters;
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    /* Create the semaphore used to communicate between this task and the
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    WIZnet ISR. */
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    vSemaphoreCreateBinary( xTCPSemaphore );
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        /* Make sure everything is setup before we start. */
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        prvNetifInit();
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        prvHTTPInit();
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        for( ;; )
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        {
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                /* Wait until the ISR tells us there is something to do. */
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        xSemaphoreTake( xTCPSemaphore, portMAX_DELAY );
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                /* Check each socket. */
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                for( i = 0; i < httpSOCKET_NUM; i++ )
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                {
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                        ucState = select( i, SEL_CONTROL );
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                        switch (ucState)
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                        {
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                                case SOCK_ESTABLISHED :  /* new connection established. */
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                                        if( ( sLen = select( i, SEL_RECV ) ) > 0 )
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                                        {
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                                                if( sLen > httpSOCKET_BUFFER_SIZE )
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                                                {
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                                                        sLen = httpSOCKET_BUFFER_SIZE;
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                                                }
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                                                disable();
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                                                sLen = recv( i, ucSocketBuffer, sLen );
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                                                if( ucConnection[ i ] == 1 )
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                                                {
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                                                        /* This is our first time processing a HTTP
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                                                         request on this connection. */
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                                                        prvTransmitHTTP( i );
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                                                        ucConnection[i] = 0;
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                                                }
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                                                enable();
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                                        }
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                                        break;
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                                case SOCK_CLOSE_WAIT :
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                                        close(i);
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                                        break;
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                                case SOCK_CLOSED :
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                                        ucConnection[i] = 1;
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                                        socket( i, SOCK_STREAM, 80, 0x00 );
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                                        NBlisten( i ); /* reinitialize socket. */
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                                        break;
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                        }
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                }
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        }
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}
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/*-----------------------------------------------------------*/
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static void prvHTTPInit( void )
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{
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unsigned char ucIndex;
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        /* There are 4 total sockets available; we will claim 3 for HTTP. */
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        for(ucIndex = 0; ucIndex < httpSOCKET_NUM; ucIndex++)
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        {
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                socket( ucIndex, SOCK_STREAM, httpPORT, 0x00 );
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                NBlisten( ucIndex );
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                ucConnection[ ucIndex ] = 1;
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        }
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}
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/*-----------------------------------------------------------*/
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static void prvNetifInit( void )
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{
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        i2chip_init();
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        initW3100A();
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        setMACAddr( ( unsigned char * ) ucMacAddress );
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        setgateway( ( unsigned char * ) ucGatewayAddress );
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        setsubmask( ( unsigned char * ) ucSubnetMask );
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        setIP( ( unsigned char * ) ucIPAddress );
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        /* See definition of 'sysinit' in socket.c
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         - 8 KB transmit buffer, and 8 KB receive buffer available.  These buffers
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           are shared by all 4 channels.
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         - (0x55, 0x55) configures the send and receive buffers at
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                httpSOCKET_BUFFER_SIZE bytes for each of the 4 channels. */
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        sysinit( 0x55, 0x55 );
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}
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/*-----------------------------------------------------------*/
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static void prvTransmitHTTP(unsigned char socket)
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{
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extern short usCheckStatus;
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        /* Send the http and html headers. */
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        send( socket, ( unsigned char * ) httpOUTPUT_OK, strlen( httpOUTPUT_OK ) );
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        send( socket, ( unsigned char * ) HTML_OUTPUT_BEGIN, strlen( HTML_OUTPUT_BEGIN ) );
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        /* Generate then send the table showing the status of each task. */
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        vTaskList( ucSocketBuffer );
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        send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
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        /* Send the number of times the idle task has looped. */
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    sprintf( ucSocketBuffer, "</pre></font><p><br>The idle task has looped 0x%08lx times<br>", ulIdleLoops );
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        send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
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        /* Send the tick count. */
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    sprintf( ucSocketBuffer, "The tick count is 0x%08lx<br>", xTaskGetTickCount() );
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        send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
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        /* Show a message indicating whether or not the check task has discovered
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        an error in any of the standard demo tasks. */
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    if( usCheckStatus == 0 )
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    {
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            sprintf( ucSocketBuffer, "No errors detected." );
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                send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
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    }
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    else
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    {
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            sprintf( ucSocketBuffer, "<font color=\"red\">An error has been detected in at least one task %x.</font><p>", usCheckStatus );
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                send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) );
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    }
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        /* Finish the page off. */
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        send( socket, (unsigned char*)HTML_OUTPUT_END, strlen(HTML_OUTPUT_END));
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        /* Must make sure the data is gone before closing the socket. */
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        while( !tx_empty( socket ) )
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    {
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        vTaskDelay( httpTX_WAIT );
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    }
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        close(socket);
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}
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/*-----------------------------------------------------------*/
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void vApplicationIdleHook( void )
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{
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        ulIdleLoops++;
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}
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