root/Examples_CP-JR_ARM7_LPC2368/FreeRTOS_Book/Source-Code-For-Examples/Examples/Example007/main.c

Revision 36, 4.5 kB (checked in by phil, 15 years ago)

added purchased FreeRTOS book

Line 
1 /*
2         FreeRTOS.org V5.0.4 - Copyright (C) 2003-2008 Richard Barry.
3
4         This file is part of the FreeRTOS.org distribution.
5
6         FreeRTOS.org is free software; you can redistribute it and/or modify
7         it under the terms of the GNU General Public License as published by
8         the Free Software Foundation; either version 2 of the License, or
9         (at your option) any later version.
10
11         FreeRTOS.org is distributed in the hope that it will be useful,
12         but WITHOUT ANY WARRANTY; without even the implied warranty of
13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14         GNU General Public License for more details.
15
16         You should have received a copy of the GNU General Public License
17         along with FreeRTOS.org; if not, write to the Free Software
18         Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19
20         A special exception to the GPL can be applied should you wish to distribute
21         a combined work that includes FreeRTOS.org, without being obliged to provide
22         the source code for any proprietary components.  See the licensing section
23         of http://www.FreeRTOS.org for full details of how and when the exception
24         can be applied.
25
26     ***************************************************************************
27     ***************************************************************************
28     *                                                                         *
29     * SAVE TIME AND MONEY!  We can port FreeRTOS.org to your own hardware,    *
30     * and even write all or part of your application on your behalf.          *
31     * See http://www.OpenRTOS.com for details of the services we provide to   *
32     * expedite your project.                                                  *
33     *                                                                         *
34     ***************************************************************************
35     ***************************************************************************
36
37         Please ensure to read the configuration and relevant port sections of the
38         online documentation.
39
40         http://www.FreeRTOS.org - Documentation, latest information, license and
41         contact details.
42
43         http://www.SafeRTOS.com - A version that is certified for use in safety
44         critical systems.
45
46         http://www.OpenRTOS.com - Commercial support, development, porting,
47         licensing and training services.
48 */
49
50 /* FreeRTOS.org includes. */
51 #include "FreeRTOS.h"
52 #include "task.h"
53
54 /* Demo includes. */
55 #include "basic_io.h"
56
57 /* The task function. */
58 void vTaskFunction( void *pvParameters );
59
60 /* A variable that is incremented by the idle task hook function. */
61 static unsigned long ulIdleCycleCount = 0UL;
62
63 /* Define the strings that will be passed in as the task parameters.  These are
64 defined const and off the stack to ensure they remain valid when the tasks are
65 executing. */
66 const char *pcTextForTask1 = "Task 1 is running\r\n";
67 const char *pcTextForTask2 = "Task 2 is running\t\n";
68
69 /*-----------------------------------------------------------*/
70
71 int main( void )
72 {
73         /* Create the first task at priority 1... */
74         xTaskCreate( vTaskFunction, "Task 1", 1000, (void*)pcTextForTask1, 1, NULL );
75
76         /* ... and the second task at priority 2.  The priority is the second to
77         last parameter. */
78         xTaskCreate( vTaskFunction, "Task 2", 1000, (void*)pcTextForTask2, 2, NULL );
79
80         /* Start the scheduler so our tasks start executing. */
81         vTaskStartScheduler(); 
82        
83         for( ;; );
84         return 0;
85 }
86 /*-----------------------------------------------------------*/
87
88 void vTaskFunction( void *pvParameters )
89 {
90 char *pcTaskName;
91
92         /* The string to print out is passed in via the parameter.  Cast this to a
93         character pointer. */
94         pcTaskName = ( char * ) pvParameters;
95
96         /* As per most tasks, this task is implemented in an infinite loop. */
97         for( ;; )
98         {
99                 /* Print out the name of this task AND the number of times ulIdleCycleCount
100         has been incremented. */
101                 vPrintStringAndNumber( pcTaskName, ulIdleCycleCount );
102
103                 /* Delay for a period.  This time we use a call to vTaskDelay() which
104                 puts the task into the Blocked state until the delay period has expired.
105                 The delay period is specified in 'ticks'. */
106                 vTaskDelay( 250 / portTICK_RATE_MS );
107         }
108 }
109 /*-----------------------------------------------------------*/
110
111 /* Idle hook functions MUST be called vApplicationIdleHook(), take no parameters,
112 and return void. */
113 void vApplicationIdleHook( void )
114 {
115         /* This hook function does nothing but increment a counter. */
116         ulIdleCycleCount++;
117 }
118
119
120
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