/* FreeRTOS V8.1.0 - Copyright (C) 2014 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. * * * * Help yourself get started quickly and support the FreeRTOS * * project by purchasing a FreeRTOS tutorial book, reference * * manual, or both from: http://www.FreeRTOS.org/Documentation * * * * Thank you! * * * *************************************************************************** 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 * * * *************************************************************************** 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, including FreeRTOS+Trace - an indispensable productivity tool, a DOS compatible FAT file system, and our tiny thread aware UDP/IP stack. http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS licenses offer ticketed support, indemnification and 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! */ #pragma comment( lib, "ws2_32.lib" ) /* Win32 includes. */ #include /* FreeRTOS includes. */ #include "FreeRTOS.h" #include "task.h" /* Standard includes. */ #include #include /* FreeRTOS+CLI includes. */ #include "FreeRTOS_CLI.h" /* Dimensions the buffer into which input characters are placed. */ #define cmdMAX_INPUT_SIZE 60 /* Dimensions the buffer into which string outputs can be placed. */ #define cmdMAX_OUTPUT_SIZE 1024 /* Dimensions the buffer passed to the recvfrom() call. */ #define cmdSOCKET_INPUT_BUFFER_SIZE 60 /* DEL acts as a backspace. */ #define cmdASCII_DEL ( 0x7F ) /* * Open and configure the UDP socket. */ static SOCKET prvOpenUDPSocket( void ); /*-----------------------------------------------------------*/ /* * Task that provides the input and output for the FreeRTOS+CLI command * interpreter. In this case a WinSock UDP port is used for convenience as this * demo runs in a simulated environment on a Windows PC. See the URL in the * comments within main.c for the location of the online documentation. */ void vUDPCommandInterpreterTask( void *pvParameters ) { long lBytes, lByte; signed char cInChar, cInputIndex = 0; static signed char cInputString[ cmdMAX_INPUT_SIZE ], cOutputString[ cmdMAX_OUTPUT_SIZE ], cLocalBuffer[ cmdSOCKET_INPUT_BUFFER_SIZE ]; BaseType_t xMoreDataToFollow; volatile int iErrorCode = 0; struct sockaddr_in xClient; int xClientAddressLength = sizeof( struct sockaddr_in ); SOCKET xSocket; /* Just to prevent compiler warnings. */ ( void ) pvParameters; /* Attempt to open the socket. */ xSocket = prvOpenUDPSocket(); if( xSocket != INVALID_SOCKET ) { for( ;; ) { /* Wait for incoming data on the opened socket. */ lBytes = recvfrom( xSocket, cLocalBuffer, sizeof( cLocalBuffer ), 0, ( struct sockaddr * ) &xClient, &xClientAddressLength ); if( lBytes == SOCKET_ERROR ) { /* Something went wrong, but it is not handled by this simple example. */ iErrorCode = WSAGetLastError(); } else { /* Process each received byte in turn. */ lByte = 0; while( lByte < lBytes ) { /* The next character in the input buffer. */ cInChar = cLocalBuffer[ lByte ]; lByte++; /* Newline characters are taken as the end of the command string. */ if( cInChar == '\n' ) { /* Process the input string received prior to the newline. */ do { /* Pass the string to FreeRTOS+CLI. */ xMoreDataToFollow = FreeRTOS_CLIProcessCommand( cInputString, cOutputString, cmdMAX_OUTPUT_SIZE ); /* Send the output generated by the command's implementation. */ sendto( xSocket, cOutputString, strlen( cOutputString ), 0, ( SOCKADDR * ) &xClient, xClientAddressLength ); } while( xMoreDataToFollow != pdFALSE ); /* Until the command does not generate any more output. */ /* All the strings generated by the command processing have been sent. Clear the input string ready to receive the next command. */ cInputIndex = 0; memset( cInputString, 0x00, cmdMAX_INPUT_SIZE ); /* Transmit a spacer, just to make the command console easier to read. */ sendto( xSocket, "\r\n", strlen( "\r\n" ), 0, ( SOCKADDR * ) &xClient, xClientAddressLength ); } else { if( cInChar == '\r' ) { /* Ignore the character. Newlines are used to detect the end of the input string. */ } else if( ( cInChar == '\b' ) || ( cInChar == cmdASCII_DEL ) ) { /* Backspace was pressed. Erase the last character in the string - if any. */ if( cInputIndex > 0 ) { cInputIndex--; cInputString[ cInputIndex ] = '\0'; } } else { /* A character was entered. Add it to the string entered so far. When a \n is entered the complete string will be passed to the command interpreter. */ if( cInputIndex < cmdMAX_INPUT_SIZE ) { cInputString[ cInputIndex ] = cInChar; cInputIndex++; } } } } } } } else { /* The socket could not be opened. */ vTaskDelete( NULL ); } } /*-----------------------------------------------------------*/ static SOCKET prvOpenUDPSocket( void ) { WSADATA xWSAData; WORD wVersionRequested; struct sockaddr_in xServer; SOCKET xSocket = INVALID_SOCKET; wVersionRequested = MAKEWORD( 2, 2 ); /* Prepare to use WinSock. */ if( WSAStartup( wVersionRequested, &xWSAData ) != 0 ) { fprintf( stderr, "Could not open Windows connection.\n" ); } else { xSocket = socket( AF_INET, SOCK_DGRAM, 0 ); if( xSocket == INVALID_SOCKET) { fprintf( stderr, "Could not create socket.\n" ); WSACleanup(); } else { /* Zero out the server structure. */ memset( ( void * ) &xServer, 0x00, sizeof( struct sockaddr_in ) ); /* Set family and port. */ xServer.sin_family = AF_INET; xServer.sin_port = htons( configUDP_CLI_PORT_NUMBER ); /* Assign the loopback address */ xServer.sin_addr.S_un.S_un_b.s_b1 = 127; xServer.sin_addr.S_un.S_un_b.s_b2 = 0; xServer.sin_addr.S_un.S_un_b.s_b3 = 0; xServer.sin_addr.S_un.S_un_b.s_b4 = 1; /* Bind the address to the socket. */ if( bind( xSocket, ( struct sockaddr * ) &xServer, sizeof( struct sockaddr_in ) ) == -1 ) { fprintf( stderr, "Could not socket to port %d.\n", configUDP_CLI_PORT_NUMBER ); closesocket( xSocket ); xSocket = INVALID_SOCKET; WSACleanup(); } } } return xSocket; }