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LPC8xx: add gpt_lld_change_interval() 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5546 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
theShed 2013-04-05 15:04:49 +00:00
parent c86a83d45a
commit 9986b28b99
1 changed files with 16 additions and 0 deletions
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16
os/hal/platforms/LPC8xx/gpt_lld.h
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@ -152,6 +152,22 @@ struct GPTDriver {
/* Driver macros. */ /* Driver macros. */
/*===========================================================================*/ /*===========================================================================*/
/**
* @brief Changes the interval of GPT peripheral.
* @details This function changes the interval of a running GPT unit.
* @pre The GPT unit must have been activated using @p gptStart().
* @pre The GPT unit must have been running in continuous mode using
* @p gptStartContinuous().
* @post The GPT unit interval is changed to the new value.
* @note The function has effect at the next cycle start.
*
* @param[in] gptp pointer to a @p GPTDriver object
* @param[in] interval new cycle time in timer ticks
* @notapi
*/
#define gpt_lld_change_interval(gptp, interval) \
((gptp)->tmr->INTVAL = ((interval*(gptp)->pr) - 1))
/*===========================================================================*/ /*===========================================================================*/
/* External declarations. */ /* External declarations. */
/*===========================================================================*/ /*===========================================================================*/