OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [MB91460_Softune/] [SRC/] [crflash_modified.c] - Blame information for rev 609

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 584 jeremybenn
/*
2
    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
3
 
4
    ***************************************************************************
5
    *                                                                         *
6
    * If you are:                                                             *
7
    *                                                                         *
8
    *    + New to FreeRTOS,                                                   *
9
    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
10
    *    + Looking for basic training,                                        *
11
    *    + Wanting to improve your FreeRTOS skills and productivity           *
12
    *                                                                         *
13
    * then take a look at the FreeRTOS books - available as PDF or paperback  *
14
    *                                                                         *
15
    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
16
    *                  http://www.FreeRTOS.org/Documentation                  *
17
    *                                                                         *
18
    * A pdf reference manual is also available.  Both are usually delivered   *
19
    * to your inbox within 20 minutes to two hours when purchased between 8am *
20
    * and 8pm GMT (although please allow up to 24 hours in case of            *
21
    * exceptional circumstances).  Thank you for your support!                *
22
    *                                                                         *
23
    ***************************************************************************
24
 
25
    This file is part of the FreeRTOS distribution.
26
 
27
    FreeRTOS is free software; you can redistribute it and/or modify it under
28
    the terms of the GNU General Public License (version 2) as published by the
29
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
30
    ***NOTE*** The exception to the GPL is included to allow you to distribute
31
    a combined work that includes FreeRTOS without being obliged to provide the
32
    source code for proprietary components outside of the FreeRTOS kernel.
33
    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
34
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
35
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
36
    more details. You should have received a copy of the GNU General Public
37
    License and the FreeRTOS license exception along with FreeRTOS; if not it
38
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
39
    by writing to Richard Barry, contact details for whom are available on the
40
    FreeRTOS WEB site.
41
 
42
    1 tab == 4 spaces!
43
 
44
    http://www.FreeRTOS.org - Documentation, latest information, license and
45
    contact details.
46
 
47
    http://www.SafeRTOS.com - A version that is certified for use in safety
48
    critical systems.
49
 
50
    http://www.OpenRTOS.com - Commercial support, development, porting,
51
    licensing and training services.
52
*/
53
 
54
/*
55
 * This demo application file demonstrates the use of queues to pass data
56
 * between co-routines.
57
 *
58
 * N represents the number of 'fixed delay' co-routines that are created and
59
 * is set during initialisation.
60
 *
61
 * N 'fixed delay' co-routines are created that just block for a fixed
62
 * period then post the number of an LED onto a queue.  Each such co-routine
63
 * uses a different block period.  A single 'flash' co-routine is also created
64
 * that blocks on the same queue, waiting for the number of the next LED it
65
 * should flash.  Upon receiving a number it simply toggle the instructed LED
66
 * then blocks on the queue once more.  In this manner each LED from LED 0 to
67
 * LED N-1 is caused to flash at a different rate.
68
 *
69
 * The 'fixed delay' co-routines are created with co-routine priority 0.  The
70
 * flash co-routine is created with co-routine priority 1.  This means that
71
 * the queue should never contain more than a single item.  This is because
72
 * posting to the queue will unblock the 'flash' co-routine, and as this has
73
 * a priority greater than the tasks posting to the queue it is guaranteed to
74
 * have emptied the queue and blocked once again before the queue can contain
75
 * any more date.  An error is indicated if an attempt to post data to the
76
 * queue fails - indicating that the queue is already full.
77
 *
78
 */
79
 
80
/* Scheduler includes. */
81
#include "FreeRTOS.h"
82
#include "croutine.h"
83
#include "queue.h"
84
 
85
/* Demo application includes. */
86
#include "partest.h"
87
#include "crflash.h"
88
 
89
/* The queue should only need to be of length 1.  See the description at the
90
top of the file. */
91
#define crfQUEUE_LENGTH         1
92
 
93
#define crfFIXED_DELAY_PRIORITY         0
94
#define crfFLASH_PRIORITY                       1
95
 
96
/* Only one flash co-routine is created so the index is not significant. */
97
#define crfFLASH_INDEX                          0
98
 
99
/* Don't allow more than crfMAX_FLASH_TASKS 'fixed delay' co-routines to be
100
created. */
101
#define crfMAX_FLASH_TASKS                      8
102
 
103
/* We don't want to block when posting to the queue. */
104
#define crfPOSTING_BLOCK_TIME           0
105
 
106
/* Added by MPi, this define is added in order to make the vParTestToggleLED()
107
work. This basically differentiates the PDR09 from PDR00. 7-seg display LEDs connected
108
to PDR09 (SEG1) are used by the prvFlashCoRoutine() and PDR00 (SEG2) are used by tasks. */
109
#define PDR00_Offset    8
110
 
111
/*
112
 * The 'fixed delay' co-routine as described at the top of the file.
113
 */
114
static void prvFixedDelayCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex );
115
 
116
/*
117
 * The 'flash' co-routine as described at the top of the file.
118
 */
119
static void prvFlashCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex );
120
 
121
/* The queue used to pass data between the 'fixed delay' co-routines and the
122
'flash' co-routine. */
123
static xQueueHandle xFlashQueue;
124
 
125
/* This will be set to pdFALSE if we detect an error. */
126
static unsigned portBASE_TYPE uxCoRoutineFlashStatus = pdPASS;
127
 
128
/*-----------------------------------------------------------*/
129
 
130
/*
131
 * See the header file for details.
132
 */
133
void vStartFlashCoRoutines( unsigned portBASE_TYPE uxNumberToCreate )
134
{
135
unsigned portBASE_TYPE uxIndex;
136
 
137
        if( uxNumberToCreate > crfMAX_FLASH_TASKS )
138
        {
139
                uxNumberToCreate = crfMAX_FLASH_TASKS;
140
        }
141
 
142
        /* Create the queue used to pass data between the co-routines. */
143
        xFlashQueue = xQueueCreate( crfQUEUE_LENGTH, sizeof( unsigned portBASE_TYPE ) );
144
 
145
        if( xFlashQueue )
146
        {
147
                /* Create uxNumberToCreate 'fixed delay' co-routines. */
148
                for( uxIndex = 0; uxIndex < uxNumberToCreate; uxIndex++ )
149
                {
150
                        xCoRoutineCreate( prvFixedDelayCoRoutine, crfFIXED_DELAY_PRIORITY, uxIndex );
151
                }
152
 
153
                /* Create the 'flash' co-routine. */
154
                xCoRoutineCreate( prvFlashCoRoutine, crfFLASH_PRIORITY, crfFLASH_INDEX );
155
        }
156
}
157
/*-----------------------------------------------------------*/
158
 
159
static void prvFixedDelayCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
160
{
161
/* Even though this is a co-routine the xResult variable does not need to be
162
static as we do not need it to maintain its state between blocks. */
163
signed portBASE_TYPE xResult;
164
/* The uxIndex parameter of the co-routine function is used as an index into
165
the xFlashRates array to obtain the delay period to use. */
166
static const portTickType xFlashRates[ crfMAX_FLASH_TASKS ] = { 150 / portTICK_RATE_MS,
167
                                                                                                                                200 / portTICK_RATE_MS,
168
                                                                                                                                250 / portTICK_RATE_MS,
169
                                                                                                                                300 / portTICK_RATE_MS,
170
                                                                                                                                350 / portTICK_RATE_MS,
171
                                                                                                                                400 / portTICK_RATE_MS,
172
                                                                                                                                450 / portTICK_RATE_MS,
173
                                                                                                                                500  / portTICK_RATE_MS };
174
 
175
        /* Co-routines MUST start with a call to crSTART. */
176
        crSTART( xHandle );
177
 
178
        for( ;; )
179
        {
180
                /* Post our uxIndex value onto the queue.  This is used as the LED to
181
                flash. */
182
                crQUEUE_SEND( xHandle, xFlashQueue, ( void * ) &uxIndex, crfPOSTING_BLOCK_TIME, &xResult );
183
 
184
                if( xResult != pdPASS )
185
                {
186
                        /* For the reasons stated at the top of the file we should always
187
                        find that we can post to the queue.  If we could not then an error
188
                        has occurred. */
189
                        uxCoRoutineFlashStatus = pdFAIL;
190
                }
191
 
192
                crDELAY( xHandle, xFlashRates[ uxIndex ] );
193
        }
194
 
195
        /* Co-routines MUST end with a call to crEND. */
196
        crEND();
197
}
198
/*-----------------------------------------------------------*/
199
 
200
static void prvFlashCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
201
{
202
/* Even though this is a co-routine the variable do not need to be
203
static as we do not need it to maintain their state between blocks. */
204
signed portBASE_TYPE xResult;
205
unsigned portBASE_TYPE uxLEDToFlash;
206
 
207
        /* Co-routines MUST start with a call to crSTART. */
208
        crSTART( xHandle );
209
        ( void ) uxIndex;
210
 
211
        for( ;; )
212
        {
213
                /* Block to wait for the number of the LED to flash. */
214
                crQUEUE_RECEIVE( xHandle, xFlashQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
215
 
216
                if( xResult != pdPASS )
217
                {
218
                        /* We would not expect to wake unless we received something. */
219
                        uxCoRoutineFlashStatus = pdFAIL;
220
                }
221
                else
222
                {
223
                        /* We received the number of an LED to flash - flash it! */
224
                        /* Added by MPi, PDR00_Offset is added in order to make the
225
                        vParTestToggleLED() work. */
226
                        vParTestToggleLED( uxLEDToFlash +  PDR00_Offset );
227
                }
228
        }
229
 
230
        /* Co-routines MUST end with a call to crEND. */
231
        crEND();
232
}
233
/*-----------------------------------------------------------*/
234
 
235
portBASE_TYPE xAreFlashCoRoutinesStillRunning( void )
236
{
237
        /* Return pdPASS or pdFAIL depending on whether an error has been detected
238
        or not. */
239
        return uxCoRoutineFlashStatus;
240
}
241
 

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.