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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [AVR_ATMega323_IAR/] [main.c] - Blame information for rev 594

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

Line No. Rev Author Line
1 589 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
 * Creates all the demo application tasks, then starts the scheduler.  The WEB
56
 * documentation provides more details of the demo application tasks.
57
 *
58
 * Main. c also creates a task called "Check".  This only executes every three
59
 * seconds but has the highest priority so is guaranteed to get processor time.
60
 * Its main function is to check that all the other tasks are still operational.
61
 * Each task that does not flash an LED maintains a unique count that is
62
 * incremented each time the task successfully completes its function.  Should
63
 * any error occur within such a task the count is permanently halted.  The
64
 * check task inspects the count of each task to ensure it has changed since
65
 * the last time the check task executed.  If all the count variables have
66
 * changed all the tasks are still executing error free, and the check task
67
 * toggles an LED.  Should any task contain an error at any time the LED toggle
68
 * will stop.
69
 *
70
 * The LED flash and communications test tasks do not maintain a count.
71
 */
72
 
73
/*
74
Changes from V1.2.0
75
 
76
        + Changed the baud rate for the serial test from 19200 to 57600.
77
 
78
Changes from V1.2.3
79
 
80
        + The integer and comtest tasks are now used when the cooperative scheduler
81
          is being used.  Previously they were only used with the preemptive
82
          scheduler.
83
 
84
Changes from V1.2.5
85
 
86
        + Set the baud rate to 38400.  This has a smaller error percentage with an
87
          8MHz clock (according to the manual).
88
 
89
Changes from V2.0.0
90
 
91
        + Delay periods are now specified using variables and constants of
92
          portTickType rather than unsigned long.
93
 
94
Changes from V2.2.0
95
 
96
        + File can now be built using either the IAR or WinAVR compiler.
97
 
98
Changes from V2.6.1
99
 
100
        + The IAR and WinAVR AVR ports are now maintained separately.
101
 
102
Changes from V4.0.5
103
 
104
        + Modified to demonstrate the use of co-routines.
105
*/
106
 
107
#include <stdlib.h>
108
#include <string.h>
109
 
110
#ifdef GCC_MEGA_AVR
111
        /* EEPROM routines used only with the WinAVR compiler. */
112
        #include <avr/eeprom.h>
113
#endif
114
 
115
/* Scheduler include files. */
116
#include "FreeRTOS.h"
117
#include "task.h"
118
#include "croutine.h"
119
 
120
/* Demo file headers. */
121
#include "PollQ.h"
122
#include "integer.h"
123
#include "serial.h"
124
#include "comtest.h"
125
#include "crflash.h"
126
#include "print.h"
127
#include "partest.h"
128
#include "regtest.h"
129
 
130
/* Priority definitions for most of the tasks in the demo application.  Some
131
tasks just use the idle priority. */
132
#define mainLED_TASK_PRIORITY                   ( tskIDLE_PRIORITY + 1 )
133
#define mainCOM_TEST_PRIORITY                   ( tskIDLE_PRIORITY + 2 )
134
#define mainQUEUE_POLL_PRIORITY                 ( tskIDLE_PRIORITY + 2 )
135
#define mainCHECK_TASK_PRIORITY                 ( tskIDLE_PRIORITY + 3 )
136
 
137
/* Baud rate used by the serial port tasks. */
138
#define mainCOM_TEST_BAUD_RATE                  ( ( unsigned long ) 38400 )
139
 
140
/* LED used by the serial port tasks.  This is toggled on each character Tx,
141
and mainCOM_TEST_LED + 1 is toggles on each character Rx. */
142
#define mainCOM_TEST_LED                                ( 4 )
143
 
144
/* LED that is toggled by the check task.  The check task periodically checks
145
that all the other tasks are operating without error.  If no errors are found
146
the LED is toggled.  If an error is found at any time the LED is never toggles
147
again. */
148
#define mainCHECK_TASK_LED                              ( 7 )
149
 
150
/* The period between executions of the check task. */
151
#define mainCHECK_PERIOD                                ( ( portTickType ) 3000 / portTICK_RATE_MS  )
152
 
153
/* An address in the EEPROM used to count resets.  This is used to check that
154
the demo application is not unexpectedly resetting. */
155
#define mainRESET_COUNT_ADDRESS                 ( ( void * ) 0x50 )
156
 
157
/* The number of coroutines to create. */
158
#define mainNUM_FLASH_COROUTINES                ( 3 )
159
 
160
/*
161
 * The task function for the "Check" task.
162
 */
163
static void vErrorChecks( void *pvParameters );
164
 
165
/*
166
 * Checks the unique counts of other tasks to ensure they are still operational.
167
 * Flashes an LED if everything is okay.
168
 */
169
static void prvCheckOtherTasksAreStillRunning( void );
170
 
171
/*
172
 * Called on boot to increment a count stored in the EEPROM.  This is used to
173
 * ensure the CPU does not reset unexpectedly.
174
 */
175
static void prvIncrementResetCount( void );
176
 
177
/*
178
 * Idle hook is used to scheduler co-routines.
179
 */
180
void vApplicationIdleHook( void );
181
 
182
short main( void )
183
{
184
        prvIncrementResetCount();
185
 
186
        /* Setup the LED's for output. */
187
        vParTestInitialise();
188
 
189
        /* Create the standard demo tasks. */
190
        vStartIntegerMathTasks( tskIDLE_PRIORITY );
191
        vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );
192
        vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
193
        vStartRegTestTasks();
194
 
195
        /* Create the tasks defined within this file. */
196
        xTaskCreate( vErrorChecks, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
197
 
198
        /* Create the co-routines that flash the LED's. */
199
        vStartFlashCoRoutines( mainNUM_FLASH_COROUTINES );
200
 
201
        /* In this port, to use preemptive scheduler define configUSE_PREEMPTION
202
        as 1 in portmacro.h.  To use the cooperative scheduler define
203
        configUSE_PREEMPTION as 0. */
204
        vTaskStartScheduler();
205
 
206
        return 0;
207
}
208
/*-----------------------------------------------------------*/
209
 
210
static void vErrorChecks( void *pvParameters )
211
{
212
static volatile unsigned long ulDummyVariable = 3UL;
213
 
214
        /* The parameters are not used. */
215
        ( void ) pvParameters;
216
 
217
        /* Cycle for ever, delaying then checking all the other tasks are still
218
        operating without error. */
219
        for( ;; )
220
        {
221
                vTaskDelay( mainCHECK_PERIOD );
222
 
223
                /* Perform a bit of 32bit maths to ensure the registers used by the
224
                integer tasks get some exercise. The result here is not important -
225
                see the demo application documentation for more info. */
226
                ulDummyVariable *= 3;
227
 
228
                prvCheckOtherTasksAreStillRunning();
229
        }
230
}
231
/*-----------------------------------------------------------*/
232
 
233
static void prvCheckOtherTasksAreStillRunning( void )
234
{
235
static portBASE_TYPE xErrorHasOccurred = pdFALSE;
236
 
237
        if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
238
        {
239
                xErrorHasOccurred = pdTRUE;
240
        }
241
 
242
        if( xAreComTestTasksStillRunning() != pdTRUE )
243
        {
244
                xErrorHasOccurred = pdTRUE;
245
        }
246
 
247
        if( xArePollingQueuesStillRunning() != pdTRUE )
248
        {
249
                xErrorHasOccurred = pdTRUE;
250
        }
251
 
252
        if( xAreRegTestTasksStillRunning() != pdTRUE )
253
        {
254
                xErrorHasOccurred = pdTRUE;
255
        }
256
 
257
        if( xErrorHasOccurred == pdFALSE )
258
        {
259
                /* Toggle the LED if everything is okay so we know if an error occurs even if not
260
                using console IO. */
261
                vParTestToggleLED( mainCHECK_TASK_LED );
262
        }
263
}
264
/*-----------------------------------------------------------*/
265
 
266
static void prvIncrementResetCount( void )
267
{
268
unsigned char ucCount;
269
const unsigned char ucReadBit = ( unsigned char ) 0x01;
270
const unsigned char ucWrite1 = ( unsigned char ) 0x04;
271
const unsigned char ucWrite2 = ( unsigned char ) 0x02;
272
 
273
        /* Increment the EEPROM value at 0x00.
274
 
275
        Setup the EEPROM address. */
276
        EEARH = 0x00;
277
        EEARL = 0x00;
278
 
279
        /* Set the read enable bit. */
280
        EECR |= ucReadBit;
281
 
282
        /* Wait for the read. */
283
        while( EECR & ucReadBit );
284
 
285
        /* The byte is ready. */
286
        ucCount = EEDR;
287
 
288
        /* Increment the reset count, then write the byte back. */
289
        ucCount++;
290
        EEDR = ucCount;
291
        EECR = ucWrite1;
292
        EECR = ( ucWrite1 | ucWrite2 );
293
}
294
/*-----------------------------------------------------------*/
295
 
296
void vApplicationIdleHook( void )
297
{
298
        vCoRoutineSchedule();
299
}
300
 

powered by: WebSVN 2.1.0

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