2 FreeRTOS V7.5.1 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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66 * Manages a queue of strings that are waiting to be displayed. This is used to
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67 * ensure mutual exclusion of console output.
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69 * A task wishing to display a message will call vPrintDisplayMessage (), with a
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70 * pointer to the string as the parameter. The pointer is posted onto the
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71 * xPrintQueue queue.
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73 * The task spawned in main. c blocks on xPrintQueue. When a message becomes
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74 * available it calls pcPrintGetNextMessage () to obtain a pointer to the next
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75 * string, then uses the functions defined in the portable layer FileIO. c to
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76 * display the message.
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79 * Using console IO can disrupt real time performance - depending on the port.
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80 * Standard C IO routines are not designed for real time applications. While
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81 * standard IO is useful for demonstration and debugging an alternative method
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82 * should be used if you actually require console IO as part of your application.
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84 * \page PrintC print.c
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85 * \ingroup DemoFiles
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92 + Delay periods are now specified using variables and constants of
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93 portTickType rather than unsigned long.
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98 /* Scheduler include files. */
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99 #include "FreeRTOS.h"
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102 /* Demo program include files. */
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105 static xQueueHandle xPrintQueue;
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107 /*-----------------------------------------------------------*/
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109 void vPrintInitialise( void )
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111 const unsigned portBASE_TYPE uxQueueSize = 20;
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113 /* Create the queue on which errors will be reported. */
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114 xPrintQueue = xQueueCreate( uxQueueSize, ( unsigned portBASE_TYPE ) sizeof( char * ) );
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116 /*-----------------------------------------------------------*/
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118 void vPrintDisplayMessage( const char * const * ppcMessageToSend )
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121 xQueueSend( xPrintQueue, ( void * ) ppcMessageToSend, ( portTickType ) 0 );
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123 /* Stop warnings. */
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124 ( void ) ppcMessageToSend;
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127 /*-----------------------------------------------------------*/
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129 const char *pcPrintGetNextMessage( portTickType xPrintRate )
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133 if( xQueueReceive( xPrintQueue, &pcMessage, xPrintRate ) == pdPASS )
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