2 FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
7 This file is part of the FreeRTOS distribution.
9 FreeRTOS is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License (version 2) as published by the
11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
13 ***************************************************************************
14 >>! NOTE: The modification to the GPL is included to allow you to !<<
15 >>! distribute a combined work that includes FreeRTOS without being !<<
16 >>! obliged to provide the source code for proprietary components !<<
17 >>! outside of the FreeRTOS kernel. !<<
18 ***************************************************************************
20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
23 link: http://www.freertos.org/a00114.html
25 ***************************************************************************
27 * FreeRTOS provides completely free yet professionally developed, *
28 * robust, strictly quality controlled, supported, and cross *
29 * platform software that is more than just the market leader, it *
30 * is the industry's de facto standard. *
32 * Help yourself get started quickly while simultaneously helping *
33 * to support the FreeRTOS project by purchasing a FreeRTOS *
34 * tutorial book, reference manual, or both: *
35 * http://www.FreeRTOS.org/Documentation *
37 ***************************************************************************
39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
40 the FAQ page "My application does not run, what could be wrong?". Have you
41 defined configASSERT()?
43 http://www.FreeRTOS.org/support - In return for receiving this top quality
44 embedded software for free we request you assist our global community by
45 participating in the support forum.
47 http://www.FreeRTOS.org/training - Investing in training allows your team to
48 be as productive as possible as early as possible. Now you can receive
49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
50 Ltd, and the world's leading authority on the world's leading RTOS.
52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
61 licenses offer ticketed support, indemnification and commercial middleware.
63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
64 engineered and independently SIL3 certified version for use in safety and
65 mission critical applications that require provable dependability.
70 /* ****************************************************************************
71 * This project includes a lot of tasks and tests and is therefore complex.
72 * If you would prefer a much simpler project to get started with then select
73 * the 'Blinky' build configuration within the HEW IDE. The Blinky build
74 * configuration uses main-blinky.c instead of main-full.c.
75 * ****************************************************************************
77 * Creates all the demo application tasks, then starts the scheduler. The web
78 * documentation provides more details of the standard demo application tasks,
79 * which provide no particular functionality but do provide a good example of
80 * how to use the FreeRTOS API. The tasks defined in flop.c are included in the
81 * set of standard demo tasks to ensure the floating point unit gets some
84 * In addition to the standard demo tasks, the following tasks and tests are
85 * defined and/or created within this file:
87 * "Reg test" tasks - These fill the registers with known values, then
88 * repeatedly check that each register still contains its expected value for
89 * the lifetime of the tasks. Each task uses different values. The tasks run
90 * with very low priority so get preempted very frequently. A check variable
91 * is incremented on each iteration of the test loop. A register containing an
92 * unexpected value is indicative of an error in the context switching
93 * mechanism and will result in a branch to a null loop - which in turn will
94 * prevent the check variable from incrementing any further and allow the check
95 * timer (described below) to determine that an error has occurred. The nature
96 * of the reg test tasks necessitates that they are written in assembly code.
98 * "Check Timer" and Callback Function - The check timer period is initially
99 * set to five seconds. The check timer callback function checks that all the
100 * standard demo tasks are not only still executing, but are executing without
101 * reporting any errors. If the check timer discovers that a task has either
102 * stalled, or reported an error, then it changes its own period from the
103 * initial five seconds, to just 200ms. The check timer callback function
104 * also toggles LED 3 each time it is called. This provides a visual
105 * indication of the system status: If the LED toggles every five seconds,
106 * then no issues have been discovered. If the LED toggles every 200ms, then
107 * an issue has been discovered with at least one task.
109 * "High frequency timer test" - A high frequency periodic interrupt is
110 * generated using a timer - the interrupt is assigned a priority above
111 * configMAX_SYSCALL_INTERRUPT_PRIORITY, so will not be effected by anything
112 * the kernel is doing. The frequency and priority of the interrupt, in
113 * combination with other standard tests executed in this demo, will result
114 * in interrupts nesting at least 3 and probably 4 deep. This test is only
115 * included in build configurations that have the optimiser switched on.
117 * *NOTE 1* If LED3 is toggling every 5 seconds then all the demo application
118 * tasks are executing as expected and no errors have been reported in any
119 * tasks. The toggle rate increasing to 200ms indicates that at least one task
120 * has reported unexpected behaviour.
122 * *NOTE 2* vApplicationSetupTimerInterrupt() is called by the kernel to let
123 * the application set up a timer to generate the tick interrupt. In this
124 * example a compare match timer is used for this purpose.
126 * *NOTE 3* The CPU must be in Supervisor mode when the scheduler is started.
127 * The PowerON_Reset_PC() supplied in resetprg.c with this demo has
128 * Change_PSW_PM_to_UserMode() commented out to ensure this is the case.
130 * *NOTE 4* The IntQueue common demo tasks test interrupt nesting and make use
131 * of all the 8bit timers (as two cascaded 16bit units).
134 /* Hardware specific includes. */
135 #include "iodefine.h"
137 /* Kernel includes. */
138 #include "FreeRTOS.h"
143 /* Standard demo includes. */
146 #include "IntQueue.h"
150 #include "blocktim.h"
153 #include "GenQTest.h"
155 #include "recmutex.h"
158 /* Values that are passed into the reg test tasks using the task parameter. The
159 tasks check that the values are passed in correctly. */
160 #define mainREG_TEST_1_PARAMETER ( 0x12121212UL )
161 #define mainREG_TEST_2_PARAMETER ( 0x12345678UL )
163 /* Priorities at which the tasks are created. */
164 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 1 )
165 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )
166 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
167 #define mainCREATOR_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
168 #define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
169 #define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY )
170 #define mainGEN_QUEUE_TASK_PRIORITY ( tskIDLE_PRIORITY )
171 #define mainFLOP_TASK_PRIORITY ( tskIDLE_PRIORITY )
173 /* The LED toggled by the check timer. */
174 #define mainCHECK_LED ( 3 )
176 /* The period at which the check timer will expire, in ms, provided no errors
177 have been reported by any of the standard demo tasks. ms are converted to the
178 equivalent in ticks using the portTICK_PERIOD_MS constant. */
179 #define mainCHECK_TIMER_PERIOD_MS ( 5000UL / portTICK_PERIOD_MS )
181 /* The period at which the check timer will expire, in ms, if an error has been
182 reported in one of the standard demo tasks. ms are converted to the equivalent
183 in ticks using the portTICK_PERIOD_MS constant. */
184 #define mainERROR_CHECK_TIMER_PERIOD_MS ( 200UL / portTICK_PERIOD_MS )
186 /* A block time of zero simple means "Don't Block". */
187 #define mainDONT_BLOCK ( 0UL )
190 * vApplicationMallocFailedHook() will only be called if
191 * configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
192 * function that will execute if a call to pvPortMalloc() fails.
193 * pvPortMalloc() is called internally by the kernel whenever a task, queue or
194 * semaphore is created. It is also called by various parts of the demo
197 void vApplicationMallocFailedHook( void );
200 * vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set to 1
201 * in FreeRTOSConfig.h. It is a hook function that is called on each iteration
202 * of the idle task. It is essential that code added to this hook function
203 * never attempts to block in any way (for example, call xQueueReceive() with
204 * a block time specified). If the application makes use of the vTaskDelete()
205 * API function (as this demo application does) then it is also important that
206 * vApplicationIdleHook() is permitted to return to its calling function because
207 * it is the responsibility of the idle task to clean up memory allocated by the
208 * kernel to any task that has since been deleted.
210 void vApplicationIdleHook( void );
213 * vApplicationStackOverflowHook() will only be called if
214 * configCHECK_FOR_STACK_OVERFLOW is set to a non-zero value. The handle and
215 * name of the offending task should be passed in the function parameters, but
216 * it is possible that the stack overflow will have corrupted these - in which
217 * case pxCurrentTCB can be inspected to find the same information.
219 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
222 * The reg test tasks as described at the top of this file.
224 static void prvRegTest1Task( void *pvParameters );
225 static void prvRegTest2Task( void *pvParameters );
228 * The actual implementation of the reg test functionality, which, because of
229 * the direct register access, have to be in assembly.
231 static void prvRegTest1Implementation( void );
232 static void prvRegTest2Implementation( void );
235 * The check timer callback function, as described at the top of this file.
237 static void prvCheckTimerCallback( TimerHandle_t xTimer );
240 /*-----------------------------------------------------------*/
242 /* Variables that are incremented on each iteration of the reg test tasks -
243 provided the tasks have not reported any errors. The check timer inspects these
244 variables to ensure they are still incrementing as expected. If a variable
245 stops incrementing then it is likely that its associate task has stalled. */
246 unsigned long ulRegTest1CycleCount = 0UL, ulRegTest2CycleCount = 0UL;
248 /* The check timer. This uses prvCheckTimerCallback() as its callback
250 static TimerHandle_t xCheckTimer = NULL;
252 /*-----------------------------------------------------------*/
256 extern void HardwareSetup( void );
258 /* Renesas provided CPU configuration routine. The clocks are configured in
262 /* Turn all LEDs off. */
263 vParTestInitialise();
265 /* Start the reg test tasks which test the context switching mechanism. */
266 xTaskCreate( prvRegTest1Task, "RegTst1", configMINIMAL_STACK_SIZE, ( void * ) mainREG_TEST_1_PARAMETER, tskIDLE_PRIORITY, NULL );
267 xTaskCreate( prvRegTest2Task, "RegTst2", configMINIMAL_STACK_SIZE, ( void * ) mainREG_TEST_2_PARAMETER, tskIDLE_PRIORITY, NULL );
269 /* Create the standard demo tasks. */
270 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
271 vCreateBlockTimeTasks();
272 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
273 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
274 vStartIntegerMathTasks( mainINTEGER_TASK_PRIORITY );
275 vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY );
276 vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY );
277 vStartQueuePeekTasks();
278 vStartRecursiveMutexTasks();
279 vStartInterruptQueueTasks();
280 vStartMathTasks( mainFLOP_TASK_PRIORITY );
282 /* The suicide tasks must be created last as they need to know how many
283 tasks were running prior to their creation in order to ascertain whether
284 or not the correct/expected number of tasks are running at any given time. */
285 vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY );
287 /* Create the software timer that performs the 'check' functionality,
288 as described at the top of this file. */
289 xCheckTimer = xTimerCreate( "CheckTimer",/* A text name, purely to help debugging. */
290 ( mainCHECK_TIMER_PERIOD_MS ), /* The timer period, in this case 5000ms (5s). */
291 pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
292 ( void * ) 0, /* The ID is not used, so can be set to anything. */
293 prvCheckTimerCallback /* The callback function that inspects the status of all the other tasks. */
296 /* Sanity check that the check timer was indeed created. */
297 configASSERT( xCheckTimer );
299 /* Start the check timer. It will actually start when the scheduler is
301 xTimerStart( xCheckTimer, mainDONT_BLOCK );
303 /* Start the tasks running. */
304 vTaskStartScheduler();
306 /* If all is well, the following line will never be reached as the scheduler
307 will be running. If the following line is reached, there was insufficient
308 FreeRTOS heap available for the idle task to be created. See
309 http://www.freertos.org/a00111.html and the malloc failed hook function for
313 /*-----------------------------------------------------------*/
315 static void prvCheckTimerCallback( TimerHandle_t xTimer )
317 static long lChangedTimerPeriodAlready = pdFALSE, lErrorStatus = pdPASS;
318 static volatile unsigned long ulLastRegTest1CycleCount = 0UL, ulLastRegTest2CycleCount = 0UL;
320 /* Check the standard demo tasks are running without error. */
321 if( xAreGenericQueueTasksStillRunning() != pdTRUE )
323 lErrorStatus = pdFAIL;
325 else if( xAreQueuePeekTasksStillRunning() != pdTRUE )
327 lErrorStatus = pdFAIL;
329 else if( xAreBlockingQueuesStillRunning() != pdTRUE )
331 lErrorStatus = pdFAIL;
333 else if( xAreBlockTimeTestTasksStillRunning() != pdTRUE )
335 lErrorStatus = pdFAIL;
337 else if( xAreSemaphoreTasksStillRunning() != pdTRUE )
339 lErrorStatus = pdFAIL;
341 else if( xArePollingQueuesStillRunning() != pdTRUE )
343 lErrorStatus = pdFAIL;
345 else if( xIsCreateTaskStillRunning() != pdTRUE )
347 lErrorStatus = pdFAIL;
349 else if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
351 lErrorStatus = pdFAIL;
353 else if( xAreRecursiveMutexTasksStillRunning() != pdTRUE )
355 lErrorStatus = pdFAIL;
357 else if( xAreIntQueueTasksStillRunning() != pdPASS )
359 lErrorStatus = pdFAIL;
361 else if( xAreMathsTaskStillRunning() != pdPASS )
363 lErrorStatus = pdFAIL;
366 /* Check the reg test tasks are still cycling. They will stop incrementing
367 their loop counters if they encounter an error. */
368 if( ulRegTest1CycleCount == ulLastRegTest1CycleCount )
370 lErrorStatus = pdFAIL;
373 if( ulRegTest2CycleCount == ulLastRegTest2CycleCount )
375 lErrorStatus = pdFAIL;
378 ulLastRegTest1CycleCount = ulRegTest1CycleCount;
379 ulLastRegTest2CycleCount = ulRegTest2CycleCount;
381 /* Toggle the check LED to give an indication of the system status. If
382 the LED toggles every 5 seconds then everything is ok. A faster toggle
383 indicates an error. */
384 vParTestToggleLED( mainCHECK_LED );
386 /* Was an error detected this time through the callback execution? */
387 if( lErrorStatus != pdPASS )
389 if( lChangedTimerPeriodAlready == pdFALSE )
391 lChangedTimerPeriodAlready = pdTRUE;
393 /* This call to xTimerChangePeriod() uses a zero block time.
394 Functions called from inside of a timer callback function must
395 *never* attempt to block. */
396 xTimerChangePeriod( xCheckTimer, ( mainERROR_CHECK_TIMER_PERIOD_MS ), mainDONT_BLOCK );
400 /*-----------------------------------------------------------*/
402 /* The RX port uses this callback function to configure its tick interrupt.
403 This allows the application to choose the tick interrupt source. */
404 void vApplicationSetupTimerInterrupt( void )
406 /* Enable compare match timer 0. */
409 /* Interrupt on compare match. */
410 CMT0.CMCR.BIT.CMIE = 1;
412 /* Set the compare match value. */
413 CMT0.CMCOR = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / configTICK_RATE_HZ ) -1 ) / 8 );
415 /* Divide the PCLK by 8. */
416 CMT0.CMCR.BIT.CKS = 0;
418 /* Enable the interrupt... */
419 _IEN( _CMT0_CMI0 ) = 1;
421 /* ...and set its priority to the application defined kernel priority. */
422 _IPR( _CMT0_CMI0 ) = configKERNEL_INTERRUPT_PRIORITY;
424 /* Start the timer. */
425 CMT.CMSTR0.BIT.STR0 = 1;
427 /*-----------------------------------------------------------*/
429 /* This function is explained by the comments above its prototype at the top
431 void vApplicationMallocFailedHook( void )
435 /*-----------------------------------------------------------*/
437 /* This function is explained by the comments above its prototype at the top
439 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
443 /*-----------------------------------------------------------*/
445 /* This function is explained by the comments above its prototype at the top
447 void vApplicationIdleHook( void )
449 /* If this is being executed then the kernel has been started. Start the high
450 frequency timer test as described at the top of this file. This is only
451 included in the optimised build configuration - otherwise it takes up too much
452 CPU time and can disrupt other tests. */
453 #ifdef INCLUDE_HIGH_FREQUENCY_TIMER_TEST
454 static portBASE_TYPE xTimerTestStarted = pdFALSE;
455 extern void vSetupHighFrequencyTimer( void );
456 if( xTimerTestStarted == pdFALSE )
458 vSetupHighFrequencyTimer();
459 xTimerTestStarted = pdTRUE;
463 /*-----------------------------------------------------------*/
465 /* This function is explained in the comments at the top of this file. */
466 static void prvRegTest1Task( void *pvParameters )
468 if( ( ( unsigned long ) pvParameters ) != mainREG_TEST_1_PARAMETER )
470 /* The parameter did not contain the expected value. */
473 /* Stop the tick interrupt so its obvious something has gone wrong. */
474 taskDISABLE_INTERRUPTS();
478 /* This is an inline asm function that never returns. */
479 prvRegTest1Implementation();
481 /*-----------------------------------------------------------*/
483 /* This function is explained in the comments at the top of this file. */
484 static void prvRegTest2Task( void *pvParameters )
486 if( ( ( unsigned long ) pvParameters ) != mainREG_TEST_2_PARAMETER )
488 /* The parameter did not contain the expected value. */
491 /* Stop the tick interrupt so its obvious something has gone wrong. */
492 taskDISABLE_INTERRUPTS();
496 /* This is an inline asm function that never returns. */
497 prvRegTest2Implementation();
499 /*-----------------------------------------------------------*/
501 /* This function is explained in the comments at the top of this file. */
502 #pragma inline_asm prvRegTest1Implementation
503 static void prvRegTest1Implementation( void )
505 ; Put a known value in each register.
522 ; Loop, checking each iteration that each register still contains the
526 ; Push the registers that are going to get clobbered.
529 ; Increment the loop counter to show this task is still getting CPU time.
530 MOV.L #_ulRegTest1CycleCount, R14
535 ; Yield to extend the text coverage. Set the bit in the ITU SWINTR register.
542 ; Restore the clobbered registers.
545 ; Now compare each register to ensure it still contains the value that was
546 ; set before this loop was entered.
578 ; All comparisons passed, start a new itteratio of this loop.
582 ; A compare failed, just loop here so the loop counter stops incrementing
583 ; causing the check timer to indicate the error.
586 /*-----------------------------------------------------------*/
588 /* This function is explained in the comments at the top of this file. */
589 #pragma inline_asm prvRegTest2Implementation
590 static void prvRegTest2Implementation( void )
592 ; Put a known value in each register.
609 ; Loop, checking on each iteration that each register still contains the
613 ; Push the registers that are going to get clobbered.
616 ; Increment the loop counter to show this task is still getting CPU time.
617 MOV.L #_ulRegTest2CycleCount, R14
622 ; Restore the clobbered registers.
656 ; All comparisons passed, start a new itteratio of this loop.
660 ; A compare failed, just loop here so the loop counter stops incrementing
661 ; - causing the check timer to indicate the error.
664 /*-----------------------------------------------------------*/