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/*
FreeRTOS V8.2.0rc1 - Copyright (C) 2014 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
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?". Have you defined configASSERT()? *
* *
* http://www.FreeRTOS.org/FAQHelp.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 *
* *
***************************************************************************
***************************************************************************
* *
* Investing in training allows your team to be as productive as *
* possible as early as possible, lowering your overall development *
* cost, and enabling you to bring a more robust product to market *
* earlier than would otherwise be possible. Richard Barry is both *
* the architect and key author of FreeRTOS, and so also the world's *
* leading authority on what is the world's most popular real time *
* kernel for deeply embedded MCU designs. Obtaining your training *
* from Richard ensures your team will gain directly from his in-depth *
* product knowledge and years of usage experience. Contact Real Time *
* Engineers Ltd to enquire about the FreeRTOS Masterclass, presented *
* by Richard Barry: http://www.FreeRTOS.org/contact
* *
***************************************************************************
***************************************************************************
* *
* You are receiving this top quality software for free. Please play *
* fair and reciprocate by reporting any suspected issues and *
* participating in the community forum: *
* http://www.FreeRTOS.org/support *
* *
* Thank you! *
* *
***************************************************************************
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.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!
*/
#pragma comment( lib, "ws2_32.lib" )
/* Win32 includes. */
#include <WinSock2.h>
#include <stdio.h>
/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
/* 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
/*
* 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 UDP port is used. 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' )
{
/* 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;
}
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