diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
| commit | a6163888f3c56123b1db313743c6147ba498732c (patch) | |
| tree | ff7d15d991d1d09ba6cbc0cec80924f57445bfdd /third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c | |
| parent | c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (diff) | |
Add third_party libs
Diffstat (limited to 'third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c')
| -rw-r--r-- | third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c b/third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c new file mode 100644 index 0000000..25949ea --- /dev/null +++ b/third_party/FreeRTOS/Demo/Common/Minimal/AltPollQ.c @@ -0,0 +1,275 @@ +/*
+ FreeRTOS V7.6.0 - Copyright (C) 2013 Real Time Engineers Ltd.
+ All rights reserved
+
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+ ***************************************************************************
+ * *
+ * FreeRTOS provides completely free yet professionally developed, *
+ * robust, strictly quality controlled, supported, and cross *
+ * platform software that has become a de facto standard. *
+ * *
+ * Help yourself get started quickly and support the FreeRTOS *
+ * project by purchasing a FreeRTOS tutorial book, reference *
+ * manual, or both from: http://www.FreeRTOS.org/Documentation *
+ * *
+ * Thank you! *
+ * *
+ ***************************************************************************
+
+ This file is part of the FreeRTOS distribution.
+
+ FreeRTOS is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License (version 2) as published by the
+ Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
+
+ >>! NOTE: The modification to the GPL is included to allow you to distribute
+ >>! a combined work that includes FreeRTOS without being obliged to provide
+ >>! the source code for proprietary components outside of the FreeRTOS
+ >>! kernel.
+
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. Full license text is available from the following
+ link: http://www.freertos.org/a00114.html
+
+ 1 tab == 4 spaces!
+
+ ***************************************************************************
+ * *
+ * Having a problem? Start by reading the FAQ "My application does *
+ * not run, what could be wrong?" *
+ * *
+ * http://www.FreeRTOS.org/FAQHelp.html *
+ * *
+ ***************************************************************************
+
+ http://www.FreeRTOS.org - Documentation, books, training, latest versions,
+ license and Real Time Engineers Ltd. contact details.
+
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+ http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
+ Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
+ licenses offer ticketed support, indemnification and middleware.
+
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+ engineered and independently SIL3 certified version for use in safety and
+ mission critical applications that require provable dependability.
+
+ 1 tab == 4 spaces!
+*/
+
+/*
+ * This is a version of PollQ.c that uses the alternative (Alt) API.
+ *
+ * Creates two tasks that communicate over a single queue. One task acts as a
+ * producer, the other a consumer.
+ *
+ * The producer loops for three iteration, posting an incrementing number onto the
+ * queue each cycle. It then delays for a fixed period before doing exactly the
+ * same again.
+ *
+ * The consumer loops emptying the queue. Each item removed from the queue is
+ * checked to ensure it contains the expected value. When the queue is empty it
+ * blocks for a fixed period, then does the same again.
+ *
+ * All queue access is performed without blocking. The consumer completely empties
+ * the queue each time it runs so the producer should never find the queue full.
+ *
+ * An error is flagged if the consumer obtains an unexpected value or the producer
+ * find the queue is full.
+ */
+
+/*
+Changes from V2.0.0
+
+ + Delay periods are now specified using variables and constants of
+ portTickType rather than unsigned portLONG.
+*/
+
+#include <stdlib.h>
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+
+/* Demo program include files. */
+#include "AltPollQ.h"
+
+#define pollqSTACK_SIZE configMINIMAL_STACK_SIZE
+#define pollqQUEUE_SIZE ( 10 )
+#define pollqPRODUCER_DELAY ( ( portTickType ) 200 / portTICK_RATE_MS )
+#define pollqCONSUMER_DELAY ( pollqPRODUCER_DELAY - ( portTickType ) ( 20 / portTICK_RATE_MS ) )
+#define pollqNO_DELAY ( ( portTickType ) 0 )
+#define pollqVALUES_TO_PRODUCE ( ( signed portBASE_TYPE ) 3 )
+#define pollqINITIAL_VALUE ( ( signed portBASE_TYPE ) 0 )
+
+/* The task that posts the incrementing number onto the queue. */
+static portTASK_FUNCTION_PROTO( vPolledQueueProducer, pvParameters );
+
+/* The task that empties the queue. */
+static portTASK_FUNCTION_PROTO( vPolledQueueConsumer, pvParameters );
+
+/* Variables that are used to check that the tasks are still running with no
+errors. */
+static volatile signed portBASE_TYPE xPollingConsumerCount = pollqINITIAL_VALUE, xPollingProducerCount = pollqINITIAL_VALUE;
+
+/*-----------------------------------------------------------*/
+
+void vStartAltPolledQueueTasks( unsigned portBASE_TYPE uxPriority )
+{
+static xQueueHandle xPolledQueue;
+
+ /* Create the queue used by the producer and consumer. */
+ xPolledQueue = xQueueCreate( pollqQUEUE_SIZE, ( unsigned portBASE_TYPE ) sizeof( unsigned portSHORT ) );
+
+ /* vQueueAddToRegistry() adds the queue to the queue registry, if one is
+ in use. The queue registry is provided as a means for kernel aware
+ debuggers to locate queues and has no purpose if a kernel aware debugger
+ is not being used. The call to vQueueAddToRegistry() will be removed
+ by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
+ defined to be less than 1. */
+ vQueueAddToRegistry( xPolledQueue, ( signed portCHAR * ) "AltPollQueue" );
+
+
+ /* Spawn the producer and consumer. */
+ xTaskCreate( vPolledQueueConsumer, ( signed portCHAR * ) "QConsNB", pollqSTACK_SIZE, ( void * ) &xPolledQueue, uxPriority, ( xTaskHandle * ) NULL );
+ xTaskCreate( vPolledQueueProducer, ( signed portCHAR * ) "QProdNB", pollqSTACK_SIZE, ( void * ) &xPolledQueue, uxPriority, ( xTaskHandle * ) NULL );
+}
+/*-----------------------------------------------------------*/
+
+static portTASK_FUNCTION( vPolledQueueProducer, pvParameters )
+{
+unsigned portSHORT usValue = ( unsigned portSHORT ) 0;
+signed portBASE_TYPE xError = pdFALSE, xLoop;
+
+ #ifdef USE_STDIO
+ void vPrintDisplayMessage( const portCHAR * const * ppcMessageToSend );
+
+ const portCHAR * const pcTaskStartMsg = "Alt polling queue producer task started.\r\n";
+
+ /* Queue a message for printing to say the task has started. */
+ vPrintDisplayMessage( &pcTaskStartMsg );
+ #endif
+
+ for( ;; )
+ {
+ for( xLoop = 0; xLoop < pollqVALUES_TO_PRODUCE; xLoop++ )
+ {
+ /* Send an incrementing number on the queue without blocking. */
+ if( xQueueAltSendToBack( *( ( xQueueHandle * ) pvParameters ), ( void * ) &usValue, pollqNO_DELAY ) != pdPASS )
+ {
+ /* We should never find the queue full so if we get here there
+ has been an error. */
+ xError = pdTRUE;
+ }
+ else
+ {
+ if( xError == pdFALSE )
+ {
+ /* If an error has ever been recorded we stop incrementing the
+ check variable. */
+ portENTER_CRITICAL();
+ xPollingProducerCount++;
+ portEXIT_CRITICAL();
+ }
+
+ /* Update the value we are going to post next time around. */
+ usValue++;
+ }
+ }
+
+ /* Wait before we start posting again to ensure the consumer runs and
+ empties the queue. */
+ vTaskDelay( pollqPRODUCER_DELAY );
+ }
+} /*lint !e818 Function prototype must conform to API. */
+/*-----------------------------------------------------------*/
+
+static portTASK_FUNCTION( vPolledQueueConsumer, pvParameters )
+{
+unsigned portSHORT usData, usExpectedValue = ( unsigned portSHORT ) 0;
+signed portBASE_TYPE xError = pdFALSE;
+
+ #ifdef USE_STDIO
+ void vPrintDisplayMessage( const portCHAR * const * ppcMessageToSend );
+
+ const portCHAR * const pcTaskStartMsg = "Alt blocking queue consumer task started.\r\n";
+
+ /* Queue a message for printing to say the task has started. */
+ vPrintDisplayMessage( &pcTaskStartMsg );
+ #endif
+
+ for( ;; )
+ {
+ /* Loop until the queue is empty. */
+ while( uxQueueMessagesWaiting( *( ( xQueueHandle * ) pvParameters ) ) )
+ {
+ if( xQueueAltReceive( *( ( xQueueHandle * ) pvParameters ), &usData, pollqNO_DELAY ) == pdPASS )
+ {
+ if( usData != usExpectedValue )
+ {
+ /* This is not what we expected to receive so an error has
+ occurred. */
+ xError = pdTRUE;
+
+ /* Catch-up to the value we received so our next expected
+ value should again be correct. */
+ usExpectedValue = usData;
+ }
+ else
+ {
+ if( xError == pdFALSE )
+ {
+ /* Only increment the check variable if no errors have
+ occurred. */
+ portENTER_CRITICAL();
+ xPollingConsumerCount++;
+ portEXIT_CRITICAL();
+ }
+ }
+
+ /* Next time round we would expect the number to be one higher. */
+ usExpectedValue++;
+ }
+ }
+
+ /* Now the queue is empty we block, allowing the producer to place more
+ items in the queue. */
+ vTaskDelay( pollqCONSUMER_DELAY );
+ }
+} /*lint !e818 Function prototype must conform to API. */
+/*-----------------------------------------------------------*/
+
+/* This is called to check that all the created tasks are still running with no errors. */
+portBASE_TYPE xAreAltPollingQueuesStillRunning( void )
+{
+portBASE_TYPE xReturn;
+
+ /* Check both the consumer and producer poll count to check they have both
+ been changed since out last trip round. We do not need a critical section
+ around the check variables as this is called from a higher priority than
+ the other tasks that access the same variables. */
+ if( ( xPollingConsumerCount == pollqINITIAL_VALUE ) ||
+ ( xPollingProducerCount == pollqINITIAL_VALUE )
+ )
+ {
+ xReturn = pdFALSE;
+ }
+ else
+ {
+ xReturn = pdTRUE;
+ }
+
+ /* Set the check variables back down so we know if they have been
+ incremented the next time around. */
+ xPollingConsumerCount = pollqINITIAL_VALUE;
+ xPollingProducerCount = pollqINITIAL_VALUE;
+
+ return xReturn;
+}
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