X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=FreeRTOS%2FSource%2Finclude%2Ftimers.h;h=831f389ee78070f6ad597b3b27a922d799c1c916;hb=61a5601b461eea61201ee14fc20615ddecf8c259;hp=5eb2033017ae4e47e0b192fd7a87b24fd10a29a7;hpb=abc9255183aa4ad1b011116333f26570ccc7aa4b;p=freertos diff --git a/FreeRTOS/Source/include/timers.h b/FreeRTOS/Source/include/timers.h index 5eb203301..831f389ee 100644 --- a/FreeRTOS/Source/include/timers.h +++ b/FreeRTOS/Source/include/timers.h @@ -1,66 +1,29 @@ /* - FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd. - - 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! -*/ + * FreeRTOS Kernel V10.2.1 + * Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ #ifndef TIMERS_H @@ -70,68 +33,99 @@ #error "include FreeRTOS.h must appear in source files before include timers.h" #endif -/*lint -e537 This headers are only multiply included if the application code +/*lint -save -e537 This headers are only multiply included if the application code happens to also be including task.h. */ #include "task.h" -/*lint +e956 */ +/*lint -restore */ #ifdef __cplusplus extern "C" { #endif -/* IDs for commands that can be sent/received on the timer queue. These are to -be used solely through the macros that make up the public software timer API, -as defined below. */ -#define tmrCOMMAND_START ( ( portBASE_TYPE ) 0 ) -#define tmrCOMMAND_STOP ( ( portBASE_TYPE ) 1 ) -#define tmrCOMMAND_CHANGE_PERIOD ( ( portBASE_TYPE ) 2 ) -#define tmrCOMMAND_DELETE ( ( portBASE_TYPE ) 3 ) - /*----------------------------------------------------------- * MACROS AND DEFINITIONS *----------------------------------------------------------*/ - /** +/* IDs for commands that can be sent/received on the timer queue. These are to +be used solely through the macros that make up the public software timer API, +as defined below. The commands that are sent from interrupts must use the +highest numbers as tmrFIRST_FROM_ISR_COMMAND is used to determine if the task +or interrupt version of the queue send function should be used. */ +#define tmrCOMMAND_EXECUTE_CALLBACK_FROM_ISR ( ( BaseType_t ) -2 ) +#define tmrCOMMAND_EXECUTE_CALLBACK ( ( BaseType_t ) -1 ) +#define tmrCOMMAND_START_DONT_TRACE ( ( BaseType_t ) 0 ) +#define tmrCOMMAND_START ( ( BaseType_t ) 1 ) +#define tmrCOMMAND_RESET ( ( BaseType_t ) 2 ) +#define tmrCOMMAND_STOP ( ( BaseType_t ) 3 ) +#define tmrCOMMAND_CHANGE_PERIOD ( ( BaseType_t ) 4 ) +#define tmrCOMMAND_DELETE ( ( BaseType_t ) 5 ) + +#define tmrFIRST_FROM_ISR_COMMAND ( ( BaseType_t ) 6 ) +#define tmrCOMMAND_START_FROM_ISR ( ( BaseType_t ) 6 ) +#define tmrCOMMAND_RESET_FROM_ISR ( ( BaseType_t ) 7 ) +#define tmrCOMMAND_STOP_FROM_ISR ( ( BaseType_t ) 8 ) +#define tmrCOMMAND_CHANGE_PERIOD_FROM_ISR ( ( BaseType_t ) 9 ) + + +/** * Type by which software timers are referenced. For example, a call to - * xTimerCreate() returns an xTimerHandle variable that can then be used to + * xTimerCreate() returns an TimerHandle_t variable that can then be used to * reference the subject timer in calls to other software timer API functions * (for example, xTimerStart(), xTimerReset(), etc.). */ -typedef void * xTimerHandle; +struct tmrTimerControl; /* The old naming convention is used to prevent breaking kernel aware debuggers. */ +typedef struct tmrTimerControl * TimerHandle_t; + +/* + * Defines the prototype to which timer callback functions must conform. + */ +typedef void (*TimerCallbackFunction_t)( TimerHandle_t xTimer ); -/* Define the prototype to which timer callback functions must conform. */ -typedef void (*tmrTIMER_CALLBACK)( xTimerHandle xTimer ); +/* + * Defines the prototype to which functions used with the + * xTimerPendFunctionCallFromISR() function must conform. + */ +typedef void (*PendedFunction_t)( void *, uint32_t ); /** - * xTimerHandle xTimerCreate( const signed char *pcTimerName, - * portTickType xTimerPeriodInTicks, - * unsigned portBASE_TYPE uxAutoReload, + * TimerHandle_t xTimerCreate( const char * const pcTimerName, + * TickType_t xTimerPeriodInTicks, + * UBaseType_t uxAutoReload, * void * pvTimerID, - * tmrTIMER_CALLBACK pxCallbackFunction ); + * TimerCallbackFunction_t pxCallbackFunction ); * - * Creates a new software timer instance. This allocates the storage required - * by the new timer, initialises the new timers internal state, and returns a - * handle by which the new timer can be referenced. + * Creates a new software timer instance, and returns a handle by which the + * created software timer can be referenced. + * + * Internally, within the FreeRTOS implementation, software timers use a block + * of memory, in which the timer data structure is stored. If a software timer + * is created using xTimerCreate() then the required memory is automatically + * dynamically allocated inside the xTimerCreate() function. (see + * http://www.freertos.org/a00111.html). If a software timer is created using + * xTimerCreateStatic() then the application writer must provide the memory that + * will get used by the software timer. xTimerCreateStatic() therefore allows a + * software timer to be created without using any dynamic memory allocation. * * Timers are created in the dormant state. The xTimerStart(), xTimerReset(), * xTimerStartFromISR(), xTimerResetFromISR(), xTimerChangePeriod() and - * xTimerChangePeriodFromISR() API functions can all be used to transition a timer into the - * active state. + * xTimerChangePeriodFromISR() API functions can all be used to transition a + * timer into the active state. * * @param pcTimerName A text name that is assigned to the timer. This is done - * purely to assist debugging. The kernel itself only ever references a timer by - * its handle, and never by its name. + * purely to assist debugging. The kernel itself only ever references a timer + * by its handle, and never by its name. * - * @param xTimerPeriodInTicks The timer period. The time is defined in tick periods so - * the constant portTICK_RATE_MS can be used to convert a time that has been - * specified in milliseconds. For example, if the timer must expire after 100 - * ticks, then xTimerPeriodInTicks should be set to 100. Alternatively, if the timer - * must expire after 500ms, then xPeriod can be set to ( 500 / portTICK_RATE_MS ) - * provided configTICK_RATE_HZ is less than or equal to 1000. + * @param xTimerPeriodInTicks The timer period. The time is defined in tick + * periods so the constant portTICK_PERIOD_MS can be used to convert a time that + * has been specified in milliseconds. For example, if the timer must expire + * after 100 ticks, then xTimerPeriodInTicks should be set to 100. + * Alternatively, if the timer must expire after 500ms, then xPeriod can be set + * to ( 500 / portTICK_PERIOD_MS ) provided configTICK_RATE_HZ is less than or + * equal to 1000. * * @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will - * expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter. If - * uxAutoReload is set to pdFALSE then the timer will be a one-shot timer and + * expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter. + * If uxAutoReload is set to pdFALSE then the timer will be a one-shot timer and * enter the dormant state after it expires. * * @param pvTimerID An identifier that is assigned to the timer being created. @@ -140,38 +134,38 @@ typedef void (*tmrTIMER_CALLBACK)( xTimerHandle xTimer ); * timer. * * @param pxCallbackFunction The function to call when the timer expires. - * Callback functions must have the prototype defined by tmrTIMER_CALLBACK, - * which is "void vCallbackFunction( xTimerHandle xTimer );". + * Callback functions must have the prototype defined by TimerCallbackFunction_t, + * which is "void vCallbackFunction( TimerHandle_t xTimer );". * - * @return If the timer is successfully create then a handle to the newly + * @return If the timer is successfully created then a handle to the newly * created timer is returned. If the timer cannot be created (because either * there is insufficient FreeRTOS heap remaining to allocate the timer - * structures, or the timer period was set to 0) then 0 is returned. + * structures, or the timer period was set to 0) then NULL is returned. * * Example usage: * @verbatim * #define NUM_TIMERS 5 * * // An array to hold handles to the created timers. - * xTimerHandle xTimers[ NUM_TIMERS ]; + * TimerHandle_t xTimers[ NUM_TIMERS ]; * * // An array to hold a count of the number of times each timer expires. - * long lExpireCounters[ NUM_TIMERS ] = { 0 }; + * int32_t lExpireCounters[ NUM_TIMERS ] = { 0 }; * * // Define a callback function that will be used by multiple timer instances. * // The callback function does nothing but count the number of times the * // associated timer expires, and stop the timer once the timer has expired * // 10 times. - * void vTimerCallback( xTimerHandle pxTimer ) + * void vTimerCallback( TimerHandle_t pxTimer ) * { - * long lArrayIndex; - * const long xMaxExpiryCountBeforeStopping = 10; + * int32_t lArrayIndex; + * const int32_t xMaxExpiryCountBeforeStopping = 10; * * // Optionally do something if the pxTimer parameter is NULL. * configASSERT( pxTimer ); - * + * * // Which timer expired? - * lArrayIndex = ( long ) pvTimerGetTimerID( pxTimer ); + * lArrayIndex = ( int32_t ) pvTimerGetTimerID( pxTimer ); * * // Increment the number of times that pxTimer has expired. * lExpireCounters[ lArrayIndex ] += 1; @@ -187,18 +181,18 @@ typedef void (*tmrTIMER_CALLBACK)( xTimerHandle xTimer ); * * void main( void ) * { - * long x; + * int32_t x; * * // Create then start some timers. Starting the timers before the scheduler * // has been started means the timers will start running immediately that * // the scheduler starts. * for( x = 0; x < NUM_TIMERS; x++ ) * { - * xTimers[ x ] = xTimerCreate( "Timer", // Just a text name, not used by the kernel. - * ( 100 * x ), // The timer period in ticks. - * pdTRUE, // The timers will auto-reload themselves when they expire. - * ( void * ) x, // Assign each timer a unique id equal to its array index. - * vTimerCallback // Each timer calls the same callback when it expires. + * xTimers[ x ] = xTimerCreate( "Timer", // Just a text name, not used by the kernel. + * ( 100 * x ), // The timer period in ticks. + * pdTRUE, // The timers will auto-reload themselves when they expire. + * ( void * ) x, // Assign each timer a unique id equal to its array index. + * vTimerCallback // Each timer calls the same callback when it expires. * ); * * if( xTimers[ x ] == NULL ) @@ -223,26 +217,163 @@ typedef void (*tmrTIMER_CALLBACK)( xTimerHandle xTimer ); * * // Starting the scheduler will start the timers running as they have already * // been set into the active state. - * xTaskStartScheduler(); + * vTaskStartScheduler(); + * + * // Should not reach here. + * for( ;; ); + * } + * @endverbatim + */ +#if( configSUPPORT_DYNAMIC_ALLOCATION == 1 ) + TimerHandle_t xTimerCreate( const char * const pcTimerName, /*lint !e971 Unqualified char types are allowed for strings and single characters only. */ + const TickType_t xTimerPeriodInTicks, + const UBaseType_t uxAutoReload, + void * const pvTimerID, + TimerCallbackFunction_t pxCallbackFunction ) PRIVILEGED_FUNCTION; +#endif + +/** + * TimerHandle_t xTimerCreateStatic(const char * const pcTimerName, + * TickType_t xTimerPeriodInTicks, + * UBaseType_t uxAutoReload, + * void * pvTimerID, + * TimerCallbackFunction_t pxCallbackFunction, + * StaticTimer_t *pxTimerBuffer ); + * + * Creates a new software timer instance, and returns a handle by which the + * created software timer can be referenced. + * + * Internally, within the FreeRTOS implementation, software timers use a block + * of memory, in which the timer data structure is stored. If a software timer + * is created using xTimerCreate() then the required memory is automatically + * dynamically allocated inside the xTimerCreate() function. (see + * http://www.freertos.org/a00111.html). If a software timer is created using + * xTimerCreateStatic() then the application writer must provide the memory that + * will get used by the software timer. xTimerCreateStatic() therefore allows a + * software timer to be created without using any dynamic memory allocation. + * + * Timers are created in the dormant state. The xTimerStart(), xTimerReset(), + * xTimerStartFromISR(), xTimerResetFromISR(), xTimerChangePeriod() and + * xTimerChangePeriodFromISR() API functions can all be used to transition a + * timer into the active state. + * + * @param pcTimerName A text name that is assigned to the timer. This is done + * purely to assist debugging. The kernel itself only ever references a timer + * by its handle, and never by its name. + * + * @param xTimerPeriodInTicks The timer period. The time is defined in tick + * periods so the constant portTICK_PERIOD_MS can be used to convert a time that + * has been specified in milliseconds. For example, if the timer must expire + * after 100 ticks, then xTimerPeriodInTicks should be set to 100. + * Alternatively, if the timer must expire after 500ms, then xPeriod can be set + * to ( 500 / portTICK_PERIOD_MS ) provided configTICK_RATE_HZ is less than or + * equal to 1000. + * + * @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will + * expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter. + * If uxAutoReload is set to pdFALSE then the timer will be a one-shot timer and + * enter the dormant state after it expires. + * + * @param pvTimerID An identifier that is assigned to the timer being created. + * Typically this would be used in the timer callback function to identify which + * timer expired when the same callback function is assigned to more than one + * timer. + * + * @param pxCallbackFunction The function to call when the timer expires. + * Callback functions must have the prototype defined by TimerCallbackFunction_t, + * which is "void vCallbackFunction( TimerHandle_t xTimer );". + * + * @param pxTimerBuffer Must point to a variable of type StaticTimer_t, which + * will be then be used to hold the software timer's data structures, removing + * the need for the memory to be allocated dynamically. + * + * @return If the timer is created then a handle to the created timer is + * returned. If pxTimerBuffer was NULL then NULL is returned. + * + * Example usage: + * @verbatim + * + * // The buffer used to hold the software timer's data structure. + * static StaticTimer_t xTimerBuffer; + * + * // A variable that will be incremented by the software timer's callback + * // function. + * UBaseType_t uxVariableToIncrement = 0; + * + * // A software timer callback function that increments a variable passed to + * // it when the software timer was created. After the 5th increment the + * // callback function stops the software timer. + * static void prvTimerCallback( TimerHandle_t xExpiredTimer ) + * { + * UBaseType_t *puxVariableToIncrement; + * BaseType_t xReturned; + * + * // Obtain the address of the variable to increment from the timer ID. + * puxVariableToIncrement = ( UBaseType_t * ) pvTimerGetTimerID( xExpiredTimer ); + * + * // Increment the variable to show the timer callback has executed. + * ( *puxVariableToIncrement )++; + * + * // If this callback has executed the required number of times, stop the + * // timer. + * if( *puxVariableToIncrement == 5 ) + * { + * // This is called from a timer callback so must not block. + * xTimerStop( xExpiredTimer, staticDONT_BLOCK ); + * } + * } + * + * + * void main( void ) + * { + * // Create the software time. xTimerCreateStatic() has an extra parameter + * // than the normal xTimerCreate() API function. The parameter is a pointer + * // to the StaticTimer_t structure that will hold the software timer + * // structure. If the parameter is passed as NULL then the structure will be + * // allocated dynamically, just as if xTimerCreate() had been called. + * xTimer = xTimerCreateStatic( "T1", // Text name for the task. Helps debugging only. Not used by FreeRTOS. + * xTimerPeriod, // The period of the timer in ticks. + * pdTRUE, // This is an auto-reload timer. + * ( void * ) &uxVariableToIncrement, // A variable incremented by the software timer's callback function + * prvTimerCallback, // The function to execute when the timer expires. + * &xTimerBuffer ); // The buffer that will hold the software timer structure. + * + * // The scheduler has not started yet so a block time is not used. + * xReturned = xTimerStart( xTimer, 0 ); + * + * // ... + * // Create tasks here. + * // ... + * + * // Starting the scheduler will start the timers running as they have already + * // been set into the active state. + * vTaskStartScheduler(); * * // Should not reach here. * for( ;; ); * } * @endverbatim */ -xTimerHandle xTimerCreate( const signed char * const pcTimerName, portTickType xTimerPeriodInTicks, unsigned portBASE_TYPE uxAutoReload, void * pvTimerID, tmrTIMER_CALLBACK pxCallbackFunction ) PRIVILEGED_FUNCTION; +#if( configSUPPORT_STATIC_ALLOCATION == 1 ) + TimerHandle_t xTimerCreateStatic( const char * const pcTimerName, /*lint !e971 Unqualified char types are allowed for strings and single characters only. */ + const TickType_t xTimerPeriodInTicks, + const UBaseType_t uxAutoReload, + void * const pvTimerID, + TimerCallbackFunction_t pxCallbackFunction, + StaticTimer_t *pxTimerBuffer ) PRIVILEGED_FUNCTION; +#endif /* configSUPPORT_STATIC_ALLOCATION */ /** - * void *pvTimerGetTimerID( xTimerHandle xTimer ); + * void *pvTimerGetTimerID( TimerHandle_t xTimer ); * * Returns the ID assigned to the timer. * * IDs are assigned to timers using the pvTimerID parameter of the call to - * xTimerCreated() that was used to create the timer. + * xTimerCreated() that was used to create the timer, and by calling the + * vTimerSetTimerID() API function. * * If the same callback function is assigned to multiple timers then the timer - * ID can be used within the callback function to identify which timer actually - * expired. + * ID can be used as time specific (timer local) storage. * * @param xTimer The timer being queried. * @@ -252,16 +383,37 @@ xTimerHandle xTimerCreate( const signed char * const pcTimerName, portTickType x * * See the xTimerCreate() API function example usage scenario. */ -void *pvTimerGetTimerID( xTimerHandle xTimer ) PRIVILEGED_FUNCTION; +void *pvTimerGetTimerID( const TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; /** - * portBASE_TYPE xTimerIsTimerActive( xTimerHandle xTimer ); + * void vTimerSetTimerID( TimerHandle_t xTimer, void *pvNewID ); + * + * Sets the ID assigned to the timer. + * + * IDs are assigned to timers using the pvTimerID parameter of the call to + * xTimerCreated() that was used to create the timer. + * + * If the same callback function is assigned to multiple timers then the timer + * ID can be used as time specific (timer local) storage. + * + * @param xTimer The timer being updated. + * + * @param pvNewID The ID to assign to the timer. + * + * Example usage: + * + * See the xTimerCreate() API function example usage scenario. + */ +void vTimerSetTimerID( TimerHandle_t xTimer, void *pvNewID ) PRIVILEGED_FUNCTION; + +/** + * BaseType_t xTimerIsTimerActive( TimerHandle_t xTimer ); * * Queries a timer to see if it is active or dormant. * * A timer will be dormant if: * 1) It has been created but not started, or - * 2) It is an expired on-shot timer that has not been restarted. + * 2) It is an expired one-shot timer that has not been restarted. * * Timers are created in the dormant state. The xTimerStart(), xTimerReset(), * xTimerStartFromISR(), xTimerResetFromISR(), xTimerChangePeriod() and @@ -276,7 +428,7 @@ void *pvTimerGetTimerID( xTimerHandle xTimer ) PRIVILEGED_FUNCTION; * Example usage: * @verbatim * // This function assumes xTimer has already been created. - * void vAFunction( xTimerHandle xTimer ) + * void vAFunction( TimerHandle_t xTimer ) * { * if( xTimerIsTimerActive( xTimer ) != pdFALSE ) // or more simply and equivalently "if( xTimerIsTimerActive( xTimer ) )" * { @@ -289,23 +441,22 @@ void *pvTimerGetTimerID( xTimerHandle xTimer ) PRIVILEGED_FUNCTION; * } * @endverbatim */ -portBASE_TYPE xTimerIsTimerActive( xTimerHandle xTimer ) PRIVILEGED_FUNCTION; +BaseType_t xTimerIsTimerActive( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; /** - * xTimerGetTimerDaemonTaskHandle() is only available if - * INCLUDE_xTimerGetTimerDaemonTaskHandle is set to 1 in FreeRTOSConfig.h. + * TaskHandle_t xTimerGetTimerDaemonTaskHandle( void ); * * Simply returns the handle of the timer service/daemon task. It it not valid * to call xTimerGetTimerDaemonTaskHandle() before the scheduler has been started. */ -xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); +TaskHandle_t xTimerGetTimerDaemonTaskHandle( void ) PRIVILEGED_FUNCTION; /** - * portBASE_TYPE xTimerStart( xTimerHandle xTimer, portTickType xBlockTime ); + * BaseType_t xTimerStart( TimerHandle_t xTimer, TickType_t xTicksToWait ); * * Timer functionality is provided by a timer service/daemon task. Many of the * public FreeRTOS timer API functions send commands to the timer service task - * though a queue called the timer command queue. The timer command queue is + * through a queue called the timer command queue. The timer command queue is * private to the kernel itself and is not directly accessible to application * code. The length of the timer command queue is set by the * configTIMER_QUEUE_LENGTH configuration constant. @@ -330,14 +481,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * @param xTimer The handle of the timer being started/restarted. * - * @param xBlockTime Specifies the time, in ticks, that the calling task should + * @param xTicksToWait Specifies the time, in ticks, that the calling task should * be held in the Blocked state to wait for the start command to be successfully * sent to the timer command queue, should the queue already be full when - * xTimerStart() was called. xBlockTime is ignored if xTimerStart() is called + * xTimerStart() was called. xTicksToWait is ignored if xTimerStart() is called * before the scheduler is started. * * @return pdFAIL will be returned if the start command could not be sent to - * the timer command queue even after xBlockTime ticks had passed. pdPASS will + * the timer command queue even after xTicksToWait ticks had passed. pdPASS will * be returned if the command was successfully sent to the timer command queue. * When the command is actually processed will depend on the priority of the * timer service/daemon task relative to other tasks in the system, although the @@ -350,14 +501,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * See the xTimerCreate() API function example usage scenario. * */ -#define xTimerStart( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xBlockTime ) ) +#define xTimerStart( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xTicksToWait ) ) /** - * portBASE_TYPE xTimerStop( xTimerHandle xTimer, portTickType xBlockTime ); + * BaseType_t xTimerStop( TimerHandle_t xTimer, TickType_t xTicksToWait ); * * Timer functionality is provided by a timer service/daemon task. Many of the * public FreeRTOS timer API functions send commands to the timer service task - * though a queue called the timer command queue. The timer command queue is + * through a queue called the timer command queue. The timer command queue is * private to the kernel itself and is not directly accessible to application * code. The length of the timer command queue is set by the * configTIMER_QUEUE_LENGTH configuration constant. @@ -373,14 +524,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * @param xTimer The handle of the timer being stopped. * - * @param xBlockTime Specifies the time, in ticks, that the calling task should + * @param xTicksToWait Specifies the time, in ticks, that the calling task should * be held in the Blocked state to wait for the stop command to be successfully * sent to the timer command queue, should the queue already be full when - * xTimerStop() was called. xBlockTime is ignored if xTimerStop() is called + * xTimerStop() was called. xTicksToWait is ignored if xTimerStop() is called * before the scheduler is started. * * @return pdFAIL will be returned if the stop command could not be sent to - * the timer command queue even after xBlockTime ticks had passed. pdPASS will + * the timer command queue even after xTicksToWait ticks had passed. pdPASS will * be returned if the command was successfully sent to the timer command queue. * When the command is actually processed will depend on the priority of the * timer service/daemon task relative to other tasks in the system. The timer @@ -392,16 +543,16 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * See the xTimerCreate() API function example usage scenario. * */ -#define xTimerStop( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0U, NULL, ( xBlockTime ) ) +#define xTimerStop( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0U, NULL, ( xTicksToWait ) ) /** - * portBASE_TYPE xTimerChangePeriod( xTimerHandle xTimer, - * portTickType xNewPeriod, - * portTickType xBlockTime ); + * BaseType_t xTimerChangePeriod( TimerHandle_t xTimer, + * TickType_t xNewPeriod, + * TickType_t xTicksToWait ); * * Timer functionality is provided by a timer service/daemon task. Many of the * public FreeRTOS timer API functions send commands to the timer service task - * though a queue called the timer command queue. The timer command queue is + * through a queue called the timer command queue. The timer command queue is * private to the kernel itself and is not directly accessible to application * code. The length of the timer command queue is set by the * configTIMER_QUEUE_LENGTH configuration constant. @@ -418,21 +569,21 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * @param xTimer The handle of the timer that is having its period changed. * * @param xNewPeriod The new period for xTimer. Timer periods are specified in - * tick periods, so the constant portTICK_RATE_MS can be used to convert a time + * tick periods, so the constant portTICK_PERIOD_MS can be used to convert a time * that has been specified in milliseconds. For example, if the timer must * expire after 100 ticks, then xNewPeriod should be set to 100. Alternatively, * if the timer must expire after 500ms, then xNewPeriod can be set to - * ( 500 / portTICK_RATE_MS ) provided configTICK_RATE_HZ is less than + * ( 500 / portTICK_PERIOD_MS ) provided configTICK_RATE_HZ is less than * or equal to 1000. * - * @param xBlockTime Specifies the time, in ticks, that the calling task should + * @param xTicksToWait Specifies the time, in ticks, that the calling task should * be held in the Blocked state to wait for the change period command to be * successfully sent to the timer command queue, should the queue already be - * full when xTimerChangePeriod() was called. xBlockTime is ignored if + * full when xTimerChangePeriod() was called. xTicksToWait is ignored if * xTimerChangePeriod() is called before the scheduler is started. * * @return pdFAIL will be returned if the change period command could not be - * sent to the timer command queue even after xBlockTime ticks had passed. + * sent to the timer command queue even after xTicksToWait ticks had passed. * pdPASS will be returned if the command was successfully sent to the timer * command queue. When the command is actually processed will depend on the * priority of the timer service/daemon task relative to other tasks in the @@ -446,7 +597,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // is deleted. If the timer referenced by xTimer is not active when it is * // called, then the period of the timer is set to 500ms and the timer is * // started. - * void vAFunction( xTimerHandle xTimer ) + * void vAFunction( TimerHandle_t xTimer ) * { * if( xTimerIsTimerActive( xTimer ) != pdFALSE ) // or more simply and equivalently "if( xTimerIsTimerActive( xTimer ) )" * { @@ -459,7 +610,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // cause the timer to start. Block for a maximum of 100 ticks if the * // change period command cannot immediately be sent to the timer * // command queue. - * if( xTimerChangePeriod( xTimer, 500 / portTICK_RATE_MS, 100 ) == pdPASS ) + * if( xTimerChangePeriod( xTimer, 500 / portTICK_PERIOD_MS, 100 ) == pdPASS ) * { * // The command was successfully sent. * } @@ -472,14 +623,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * } * @endverbatim */ - #define xTimerChangePeriod( xTimer, xNewPeriod, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), NULL, ( xBlockTime ) ) + #define xTimerChangePeriod( xTimer, xNewPeriod, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), NULL, ( xTicksToWait ) ) /** - * portBASE_TYPE xTimerDelete( xTimerHandle xTimer, portTickType xBlockTime ); + * BaseType_t xTimerDelete( TimerHandle_t xTimer, TickType_t xTicksToWait ); * * Timer functionality is provided by a timer service/daemon task. Many of the * public FreeRTOS timer API functions send commands to the timer service task - * though a queue called the timer command queue. The timer command queue is + * through a queue called the timer command queue. The timer command queue is * private to the kernel itself and is not directly accessible to application * code. The length of the timer command queue is set by the * configTIMER_QUEUE_LENGTH configuration constant. @@ -492,14 +643,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * @param xTimer The handle of the timer being deleted. * - * @param xBlockTime Specifies the time, in ticks, that the calling task should + * @param xTicksToWait Specifies the time, in ticks, that the calling task should * be held in the Blocked state to wait for the delete command to be * successfully sent to the timer command queue, should the queue already be - * full when xTimerDelete() was called. xBlockTime is ignored if xTimerDelete() + * full when xTimerDelete() was called. xTicksToWait is ignored if xTimerDelete() * is called before the scheduler is started. * * @return pdFAIL will be returned if the delete command could not be sent to - * the timer command queue even after xBlockTime ticks had passed. pdPASS will + * the timer command queue even after xTicksToWait ticks had passed. pdPASS will * be returned if the command was successfully sent to the timer command queue. * When the command is actually processed will depend on the priority of the * timer service/daemon task relative to other tasks in the system. The timer @@ -510,14 +661,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * See the xTimerChangePeriod() API function example usage scenario. */ -#define xTimerDelete( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_DELETE, 0U, NULL, ( xBlockTime ) ) +#define xTimerDelete( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_DELETE, 0U, NULL, ( xTicksToWait ) ) /** - * portBASE_TYPE xTimerReset( xTimerHandle xTimer, portTickType xBlockTime ); + * BaseType_t xTimerReset( TimerHandle_t xTimer, TickType_t xTicksToWait ); * * Timer functionality is provided by a timer service/daemon task. Many of the * public FreeRTOS timer API functions send commands to the timer service task - * though a queue called the timer command queue. The timer command queue is + * through a queue called the timer command queue. The timer command queue is * private to the kernel itself and is not directly accessible to application * code. The length of the timer command queue is set by the * configTIMER_QUEUE_LENGTH configuration constant. @@ -544,14 +695,14 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * @param xTimer The handle of the timer being reset/started/restarted. * - * @param xBlockTime Specifies the time, in ticks, that the calling task should + * @param xTicksToWait Specifies the time, in ticks, that the calling task should * be held in the Blocked state to wait for the reset command to be successfully * sent to the timer command queue, should the queue already be full when - * xTimerReset() was called. xBlockTime is ignored if xTimerReset() is called + * xTimerReset() was called. xTicksToWait is ignored if xTimerReset() is called * before the scheduler is started. * * @return pdFAIL will be returned if the reset command could not be sent to - * the timer command queue even after xBlockTime ticks had passed. pdPASS will + * the timer command queue even after xTicksToWait ticks had passed. pdPASS will * be returned if the command was successfully sent to the timer command queue. * When the command is actually processed will depend on the priority of the * timer service/daemon task relative to other tasks in the system, although the @@ -565,11 +716,11 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // without a key being pressed, then the LCD back-light is switched off. In * // this case, the timer is a one-shot timer. * - * xTimerHandle xBacklightTimer = NULL; + * TimerHandle_t xBacklightTimer = NULL; * * // The callback function assigned to the one-shot timer. In this case the * // parameter is not used. - * void vBacklightTimerCallback( xTimerHandle pxTimer ) + * void vBacklightTimerCallback( TimerHandle_t pxTimer ) * { * // The timer expired, therefore 5 seconds must have passed since a key * // was pressed. Switch off the LCD back-light. @@ -595,12 +746,12 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * void main( void ) * { - * long x; + * int32_t x; * * // Create then start the one-shot timer that is responsible for turning * // the back-light off if no keys are pressed within a 5 second period. * xBacklightTimer = xTimerCreate( "BacklightTimer", // Just a text name, not used by the kernel. - * ( 5000 / portTICK_RATE_MS), // The timer period in ticks. + * ( 5000 / portTICK_PERIOD_MS), // The timer period in ticks. * pdFALSE, // The timer is a one-shot timer. * 0, // The id is not used by the callback so can take any value. * vBacklightTimerCallback // The callback function that switches the LCD back-light off. @@ -627,18 +778,18 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * // Starting the scheduler will start the timer running as it has already * // been set into the active state. - * xTaskStartScheduler(); + * vTaskStartScheduler(); * * // Should not reach here. * for( ;; ); * } * @endverbatim */ -#define xTimerReset( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xBlockTime ) ) +#define xTimerReset( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_RESET, ( xTaskGetTickCount() ), NULL, ( xTicksToWait ) ) /** - * portBASE_TYPE xTimerStartFromISR( xTimerHandle xTimer, - * portBASE_TYPE *pxHigherPriorityTaskWoken ); + * BaseType_t xTimerStartFromISR( TimerHandle_t xTimer, + * BaseType_t *pxHigherPriorityTaskWoken ); * * A version of xTimerStart() that can be called from an interrupt service * routine. @@ -662,8 +813,9 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * successfully sent to the timer command queue. When the command is actually * processed will depend on the priority of the timer service/daemon task * relative to other tasks in the system, although the timers expiry time is - * relative to when xTimerStartFromISR() is actually called. The timer service/daemon - * task priority is set by the configTIMER_TASK_PRIORITY configuration constant. + * relative to when xTimerStartFromISR() is actually called. The timer + * service/daemon task priority is set by the configTIMER_TASK_PRIORITY + * configuration constant. * * Example usage: * @verbatim @@ -676,7 +828,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * // The callback function assigned to the one-shot timer. In this case the * // parameter is not used. - * void vBacklightTimerCallback( xTimerHandle pxTimer ) + * void vBacklightTimerCallback( TimerHandle_t pxTimer ) * { * // The timer expired, therefore 5 seconds must have passed since a key * // was pressed. Switch off the LCD back-light. @@ -686,7 +838,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // The key press interrupt service routine. * void vKeyPressEventInterruptHandler( void ) * { - * portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; + * BaseType_t xHigherPriorityTaskWoken = pdFALSE; * * // Ensure the LCD back-light is on, then restart the timer that is * // responsible for turning the back-light off after 5 seconds of @@ -714,16 +866,16 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * if( xHigherPriorityTaskWoken != pdFALSE ) * { * // Call the interrupt safe yield function here (actual function - * // depends on the FreeRTOS port being used. + * // depends on the FreeRTOS port being used). * } * } * @endverbatim */ -#define xTimerStartFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U ) +#define xTimerStartFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START_FROM_ISR, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U ) /** - * portBASE_TYPE xTimerStopFromISR( xTimerHandle xTimer, - * portBASE_TYPE *pxHigherPriorityTaskWoken ); + * BaseType_t xTimerStopFromISR( TimerHandle_t xTimer, + * BaseType_t *pxHigherPriorityTaskWoken ); * * A version of xTimerStop() that can be called from an interrupt service * routine. @@ -757,7 +909,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // The interrupt service routine that stops the timer. * void vAnExampleInterruptServiceRoutine( void ) * { - * portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; + * BaseType_t xHigherPriorityTaskWoken = pdFALSE; * * // The interrupt has occurred - simply stop the timer. * // xHigherPriorityTaskWoken was set to pdFALSE where it was defined @@ -777,17 +929,17 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * if( xHigherPriorityTaskWoken != pdFALSE ) * { * // Call the interrupt safe yield function here (actual function - * // depends on the FreeRTOS port being used. + * // depends on the FreeRTOS port being used). * } * } * @endverbatim */ -#define xTimerStopFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0, ( pxHigherPriorityTaskWoken ), 0U ) +#define xTimerStopFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP_FROM_ISR, 0, ( pxHigherPriorityTaskWoken ), 0U ) /** - * portBASE_TYPE xTimerChangePeriodFromISR( xTimerHandle xTimer, - * portTickType xNewPeriod, - * portBASE_TYPE *pxHigherPriorityTaskWoken ); + * BaseType_t xTimerChangePeriodFromISR( TimerHandle_t xTimer, + * TickType_t xNewPeriod, + * BaseType_t *pxHigherPriorityTaskWoken ); * * A version of xTimerChangePeriod() that can be called from an interrupt * service routine. @@ -795,11 +947,11 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * @param xTimer The handle of the timer that is having its period changed. * * @param xNewPeriod The new period for xTimer. Timer periods are specified in - * tick periods, so the constant portTICK_RATE_MS can be used to convert a time + * tick periods, so the constant portTICK_PERIOD_MS can be used to convert a time * that has been specified in milliseconds. For example, if the timer must * expire after 100 ticks, then xNewPeriod should be set to 100. Alternatively, * if the timer must expire after 500ms, then xNewPeriod can be set to - * ( 500 / portTICK_RATE_MS ) provided configTICK_RATE_HZ is less than + * ( 500 / portTICK_PERIOD_MS ) provided configTICK_RATE_HZ is less than * or equal to 1000. * * @param pxHigherPriorityTaskWoken The timer service/daemon task spends most @@ -830,7 +982,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // The interrupt service routine that changes the period of xTimer. * void vAnExampleInterruptServiceRoutine( void ) * { - * portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; + * BaseType_t xHigherPriorityTaskWoken = pdFALSE; * * // The interrupt has occurred - change the period of xTimer to 500ms. * // xHigherPriorityTaskWoken was set to pdFALSE where it was defined @@ -850,16 +1002,16 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * if( xHigherPriorityTaskWoken != pdFALSE ) * { * // Call the interrupt safe yield function here (actual function - * // depends on the FreeRTOS port being used. + * // depends on the FreeRTOS port being used). * } * } * @endverbatim */ -#define xTimerChangePeriodFromISR( xTimer, xNewPeriod, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), ( pxHigherPriorityTaskWoken ), 0U ) +#define xTimerChangePeriodFromISR( xTimer, xNewPeriod, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD_FROM_ISR, ( xNewPeriod ), ( pxHigherPriorityTaskWoken ), 0U ) /** - * portBASE_TYPE xTimerResetFromISR( xTimerHandle xTimer, - * portBASE_TYPE *pxHigherPriorityTaskWoken ); + * BaseType_t xTimerResetFromISR( TimerHandle_t xTimer, + * BaseType_t *pxHigherPriorityTaskWoken ); * * A version of xTimerReset() that can be called from an interrupt service * routine. @@ -898,7 +1050,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * * // The callback function assigned to the one-shot timer. In this case the * // parameter is not used. - * void vBacklightTimerCallback( xTimerHandle pxTimer ) + * void vBacklightTimerCallback( TimerHandle_t pxTimer ) * { * // The timer expired, therefore 5 seconds must have passed since a key * // was pressed. Switch off the LCD back-light. @@ -908,7 +1060,7 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * // The key press interrupt service routine. * void vKeyPressEventInterruptHandler( void ) * { - * portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; + * BaseType_t xHigherPriorityTaskWoken = pdFALSE; * * // Ensure the LCD back-light is on, then reset the timer that is * // responsible for turning the back-light off after 5 seconds of @@ -936,19 +1088,217 @@ xTaskHandle xTimerGetTimerDaemonTaskHandle( void ); * if( xHigherPriorityTaskWoken != pdFALSE ) * { * // Call the interrupt safe yield function here (actual function - * // depends on the FreeRTOS port being used. + * // depends on the FreeRTOS port being used). * } * } * @endverbatim */ -#define xTimerResetFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U ) +#define xTimerResetFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_RESET_FROM_ISR, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U ) + + +/** + * BaseType_t xTimerPendFunctionCallFromISR( PendedFunction_t xFunctionToPend, + * void *pvParameter1, + * uint32_t ulParameter2, + * BaseType_t *pxHigherPriorityTaskWoken ); + * + * + * Used from application interrupt service routines to defer the execution of a + * function to the RTOS daemon task (the timer service task, hence this function + * is implemented in timers.c and is prefixed with 'Timer'). + * + * Ideally an interrupt service routine (ISR) is kept as short as possible, but + * sometimes an ISR either has a lot of processing to do, or needs to perform + * processing that is not deterministic. In these cases + * xTimerPendFunctionCallFromISR() can be used to defer processing of a function + * to the RTOS daemon task. + * + * A mechanism is provided that allows the interrupt to return directly to the + * task that will subsequently execute the pended callback function. This + * allows the callback function to execute contiguously in time with the + * interrupt - just as if the callback had executed in the interrupt itself. + * + * @param xFunctionToPend The function to execute from the timer service/ + * daemon task. The function must conform to the PendedFunction_t + * prototype. + * + * @param pvParameter1 The value of the callback function's first parameter. + * The parameter has a void * type to allow it to be used to pass any type. + * For example, unsigned longs can be cast to a void *, or the void * can be + * used to point to a structure. + * + * @param ulParameter2 The value of the callback function's second parameter. + * + * @param pxHigherPriorityTaskWoken As mentioned above, calling this function + * will result in a message being sent to the timer daemon task. If the + * priority of the timer daemon task (which is set using + * configTIMER_TASK_PRIORITY in FreeRTOSConfig.h) is higher than the priority of + * the currently running task (the task the interrupt interrupted) then + * *pxHigherPriorityTaskWoken will be set to pdTRUE within + * xTimerPendFunctionCallFromISR(), indicating that a context switch should be + * requested before the interrupt exits. For that reason + * *pxHigherPriorityTaskWoken must be initialised to pdFALSE. See the + * example code below. + * + * @return pdPASS is returned if the message was successfully sent to the + * timer daemon task, otherwise pdFALSE is returned. + * + * Example usage: + * @verbatim + * + * // The callback function that will execute in the context of the daemon task. + * // Note callback functions must all use this same prototype. + * void vProcessInterface( void *pvParameter1, uint32_t ulParameter2 ) + * { + * BaseType_t xInterfaceToService; + * + * // The interface that requires servicing is passed in the second + * // parameter. The first parameter is not used in this case. + * xInterfaceToService = ( BaseType_t ) ulParameter2; + * + * // ...Perform the processing here... + * } + * + * // An ISR that receives data packets from multiple interfaces + * void vAnISR( void ) + * { + * BaseType_t xInterfaceToService, xHigherPriorityTaskWoken; + * + * // Query the hardware to determine which interface needs processing. + * xInterfaceToService = prvCheckInterfaces(); + * + * // The actual processing is to be deferred to a task. Request the + * // vProcessInterface() callback function is executed, passing in the + * // number of the interface that needs processing. The interface to + * // service is passed in the second parameter. The first parameter is + * // not used in this case. + * xHigherPriorityTaskWoken = pdFALSE; + * xTimerPendFunctionCallFromISR( vProcessInterface, NULL, ( uint32_t ) xInterfaceToService, &xHigherPriorityTaskWoken ); + * + * // If xHigherPriorityTaskWoken is now set to pdTRUE then a context + * // switch should be requested. The macro used is port specific and will + * // be either portYIELD_FROM_ISR() or portEND_SWITCHING_ISR() - refer to + * // the documentation page for the port being used. + * portYIELD_FROM_ISR( xHigherPriorityTaskWoken ); + * + * } + * @endverbatim + */ +BaseType_t xTimerPendFunctionCallFromISR( PendedFunction_t xFunctionToPend, void *pvParameter1, uint32_t ulParameter2, BaseType_t *pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION; + + /** + * BaseType_t xTimerPendFunctionCall( PendedFunction_t xFunctionToPend, + * void *pvParameter1, + * uint32_t ulParameter2, + * TickType_t xTicksToWait ); + * + * + * Used to defer the execution of a function to the RTOS daemon task (the timer + * service task, hence this function is implemented in timers.c and is prefixed + * with 'Timer'). + * + * @param xFunctionToPend The function to execute from the timer service/ + * daemon task. The function must conform to the PendedFunction_t + * prototype. + * + * @param pvParameter1 The value of the callback function's first parameter. + * The parameter has a void * type to allow it to be used to pass any type. + * For example, unsigned longs can be cast to a void *, or the void * can be + * used to point to a structure. + * + * @param ulParameter2 The value of the callback function's second parameter. + * + * @param xTicksToWait Calling this function will result in a message being + * sent to the timer daemon task on a queue. xTicksToWait is the amount of + * time the calling task should remain in the Blocked state (so not using any + * processing time) for space to become available on the timer queue if the + * queue is found to be full. + * + * @return pdPASS is returned if the message was successfully sent to the + * timer daemon task, otherwise pdFALSE is returned. + * + */ +BaseType_t xTimerPendFunctionCall( PendedFunction_t xFunctionToPend, void *pvParameter1, uint32_t ulParameter2, TickType_t xTicksToWait ) PRIVILEGED_FUNCTION; + +/** + * const char * const pcTimerGetName( TimerHandle_t xTimer ); + * + * Returns the name that was assigned to a timer when the timer was created. + * + * @param xTimer The handle of the timer being queried. + * + * @return The name assigned to the timer specified by the xTimer parameter. + */ +const char * pcTimerGetName( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */ + +/** + * void vTimerSetReloadMode( TimerHandle_t xTimer, const UBaseType_t uxAutoReload ); + * + * Updates a timer to be either an auto-reload timer, in which case the timer + * automatically resets itself each time it expires, or a one-shot timer, in + * which case the timer will only expire once unless it is manually restarted. + * + * @param xTimer The handle of the timer being updated. + * + * @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will + * expire repeatedly with a frequency set by the timer's period (see the + * xTimerPeriodInTicks parameter of the xTimerCreate() API function). If + * uxAutoReload is set to pdFALSE then the timer will be a one-shot timer and + * enter the dormant state after it expires. + */ +void vTimerSetReloadMode( TimerHandle_t xTimer, const UBaseType_t uxAutoReload ) PRIVILEGED_FUNCTION; + +/** +* UBaseType_t uxTimerGetReloadMode( TimerHandle_t xTimer ); +* +* Queries a timer to determine if it is an auto-reload timer, in which case the timer +* automatically resets itself each time it expires, or a one-shot timer, in +* which case the timer will only expire once unless it is manually restarted. +* +* @param xTimer The handle of the timer being queried. +* +* @return If the timer is an auto-reload timer then pdTRUE is returned, otherwise +* pdFALSE is returned. +*/ +UBaseType_t uxTimerGetReloadMode( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; + +/** + * TickType_t xTimerGetPeriod( TimerHandle_t xTimer ); + * + * Returns the period of a timer. + * + * @param xTimer The handle of the timer being queried. + * + * @return The period of the timer in ticks. + */ +TickType_t xTimerGetPeriod( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; + +/** +* TickType_t xTimerGetExpiryTime( TimerHandle_t xTimer ); +* +* Returns the time in ticks at which the timer will expire. If this is less +* than the current tick count then the expiry time has overflowed from the +* current time. +* +* @param xTimer The handle of the timer being queried. +* +* @return If the timer is running then the time in ticks at which the timer +* will next expire is returned. If the timer is not running then the return +* value is undefined. +*/ +TickType_t xTimerGetExpiryTime( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; /* * Functions beyond this part are not part of the public API and are intended * for use by the kernel only. */ -portBASE_TYPE xTimerCreateTimerTask( void ) PRIVILEGED_FUNCTION; -portBASE_TYPE xTimerGenericCommand( xTimerHandle xTimer, portBASE_TYPE xCommandID, portTickType xOptionalValue, signed portBASE_TYPE *pxHigherPriorityTaskWoken, portTickType xBlockTime ) PRIVILEGED_FUNCTION; +BaseType_t xTimerCreateTimerTask( void ) PRIVILEGED_FUNCTION; +BaseType_t xTimerGenericCommand( TimerHandle_t xTimer, const BaseType_t xCommandID, const TickType_t xOptionalValue, BaseType_t * const pxHigherPriorityTaskWoken, const TickType_t xTicksToWait ) PRIVILEGED_FUNCTION; + +#if( configUSE_TRACE_FACILITY == 1 ) + void vTimerSetTimerNumber( TimerHandle_t xTimer, UBaseType_t uxTimerNumber ) PRIVILEGED_FUNCTION; + UBaseType_t uxTimerGetTimerNumber( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; +#endif #ifdef __cplusplus }