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Correct the xTimerCreate() documentation which said NULL was returned if the timer period was passed into the function as 0, whereas that is not the case. (#10)

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Add a note to the documentation for both the xTimerCreate() and xTimerCreateStatic() functions that the timer period must be greater than 0.
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Yuhui.Zheng 2020-02-14 12:16:10 -08:00 committed by GitHub
parent 210b1ffcc8
commit 10bbbcf0b9
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1 changed files with 5 additions and 5 deletions
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10
include/timers.h
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@ -121,7 +121,7 @@ typedef void (*PendedFunction_t)( void *, uint32_t );
* 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.
* equal to 1000. Time timer period must be greater than 0.
*
* @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will
* expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter.
@ -138,9 +138,9 @@ typedef void (*PendedFunction_t)( void *, uint32_t );
* which is "void vCallbackFunction( TimerHandle_t xTimer );".
*
* @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 NULL is returned.
* created timer is returned. If the timer cannot be created because there is
* insufficient FreeRTOS heap remaining to allocate the timer
* structures then NULL is returned.
*
* Example usage:
* @verbatim
@ -267,7 +267,7 @@ typedef void (*PendedFunction_t)( void *, uint32_t );
* 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.
* equal to 1000. The timer period must be greater than 0.
*
* @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will
* expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter.