/* * FreeRTOS Kernel V10.3.0 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of * the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * http://www.FreeRTOS.org * http://aws.amazon.com/freertos * * 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 #include /* Tern includes. */ #include "utils\system_common.h" #include "i2chip_hw.h" #include "socket.h" /* FreeRTOS.org includes. */ #include #include #include /* 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 "\ \

FreeRTOS.orgtm + Tern E-Enginetm

\ FreeRTOS.org Homepage

\

Task status table:\r\n\ 

Task          State  Priority  Stack	#
\
************************************************
"

#define HTML_OUTPUT_END   "\
"

/*-----------------------------------------------------------*/

/*
 * 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, "


The idle task has looped 0x%08lx times
", ulIdleLoops ); send( socket, ( unsigned char * ) ucSocketBuffer, strlen( ucSocketBuffer ) ); /* Send the tick count. */ sprintf( ucSocketBuffer, "The tick count is 0x%08lx
", 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, "An error has been detected in at least one task %x.

", 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++; }