timers.h

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*/
 
 
#ifndef TIMERS_H
#define TIMERS_H
 
#ifndef INC_FREERTOS_H
#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
happens to also be including task.h. */
#include "task.h"
/*lint +e537 */
 
#ifdef __cplusplus
extern "C" {
#endif
 
// Doxygen Groups ***********************************************************************
/*-----------------------------------------------------------
 * 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 )
 
// **************************************************************************************
// Timer Handles ************************************************************************
// **************************************************************************************
typedef void *TimerHandle_t;
 
typedef void (*TimerCallbackFunction_t)(TimerHandle_t xTimer);
 
typedef void (*PendedFunction_t)(void *, uint32_t);
 
// **************************************************************************************
// Timer Handles ************************************************************************
// **************************************************************************************
#if( configSUPPORT_DYNAMIC_ALLOCATION == 1 )
TimerHandle_t xTimerCreate(const char *const pcTimerName,
                           const TickType_t xTimerPeriodInTicks,
                           const UBaseType_t uxAutoReload,
                           void *const pvTimerID,
                           TimerCallbackFunction_t pxCallbackFunction) PRIVILEGED_FUNCTION;  /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
#endif
 
#if( configSUPPORT_STATIC_ALLOCATION == 1 )
TimerHandle_t xTimerCreateStatic(const char *const pcTimerName,
                                 const TickType_t xTimerPeriodInTicks,
                                 const UBaseType_t uxAutoReload,
                                 void *const pvTimerID,
                                 TimerCallbackFunction_t pxCallbackFunction,
                                 StaticTimer_t *pxTimerBuffer) PRIVILEGED_FUNCTION;  /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
#endif /* configSUPPORT_STATIC_ALLOCATION */
 
// **************************************************************************************
// Timer Deletion ***********************************************************************
// **************************************************************************************
#define xTimerDelete( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_DELETE, 0U, NULL, ( xTicksToWait ) )
 
// **************************************************************************************
// Timer Control ************************************************************************
// **************************************************************************************
#define xTimerStart( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xTicksToWait ) )
 
#define xTimerStop( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0U, NULL, ( xTicksToWait ) )
 
#define xTimerReset( xTimer, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_RESET, ( xTaskGetTickCount() ), NULL, ( xTicksToWait ) )
 
#define xTimerChangePeriod( xTimer, xNewPeriod, xTicksToWait ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), NULL, ( xTicksToWait ) )
 
// **************************************************************************************
// Timer Control From ISR ***************************************************************
// **************************************************************************************
#define xTimerStartFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START_FROM_ISR, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U )
 
#define xTimerStopFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP_FROM_ISR, 0, ( pxHigherPriorityTaskWoken ), 0U )
 
#define xTimerChangePeriodFromISR( xTimer, xNewPeriod, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD_FROM_ISR, ( xNewPeriod ), ( pxHigherPriorityTaskWoken ), 0U )
 
#define xTimerResetFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_RESET_FROM_ISR, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U )
 
// **************************************************************************************
// Timer Utility Functions **************************************************************
// **************************************************************************************
void *pvTimerGetTimerID(const TimerHandle_t xTimer) PRIVILEGED_FUNCTION;
 
void vTimerSetTimerID(TimerHandle_t xTimer, void *pvNewID) PRIVILEGED_FUNCTION;
 
BaseType_t xTimerIsTimerActive(TimerHandle_t xTimer) PRIVILEGED_FUNCTION;
 
TaskHandle_t xTimerGetTimerDaemonTaskHandle(void) PRIVILEGED_FUNCTION;
 
const char *pcTimerGetName(TimerHandle_t xTimer) PRIVILEGED_FUNCTION;    /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
 
TickType_t xTimerGetPeriod(TimerHandle_t xTimer) PRIVILEGED_FUNCTION;
 
TickType_t xTimerGetExpiryTime(TimerHandle_t xTimer) PRIVILEGED_FUNCTION;
 
// **************************************************************************************
// Timer Deference **********************************************************************
// **************************************************************************************
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) PRIVILEGED_FUNCTION;
 
/*
 * Functions beyond this part are not part of the public API and are intended
 * for use by the kernel only.
 */
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;
 
#ifdef __cplusplus
}
#endif
#endif /* TIMERS_H */