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Merge pull request #3174 from daniel-k/periph_rtt_conv

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periph/rtt: add macros for time to tick conversion
This commit is contained in:
Thomas Eichinger 2015-07-18 17:55:07 +02:00
commit c72f37a30b
1 changed files with 33 additions and 0 deletions
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33
drivers/include/periph/rtt.h
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@ -32,6 +32,39 @@ extern "C" {
/* guard file in case no RTT device was specified */
#if RTT_NUMOF
#ifndef RTT_FREQUENCY
#warning "RTT_FREQUENCY undefined. Set RTT_FREQUENCY to the number of ticks" \
"per second for the current architecture."
#endif
/**
* @brief Convert microseconds to rtt ticks
* @param[in] us number of microseconds
* @return rtt ticks
*/
#define RTT_US_TO_TICKS(us) ((uint32_t)((uint64_t)(us) * RTT_FREQUENCY / 1000000UL))
/**
* @brief Convert milliseconds to rtt ticks
* @param[in] ms number of milliseconds
* @return rtt ticks
*/
#define RTT_MS_TO_TICKS(ms) ( RTT_US_TO_TICKS((ms) * 1000) )
/**
* @brief Convert seconds to rtt ticks
* @param[in] sec number of seconds
* @return rtt ticks
*/
#define RTT_SEC_TO_TICKS(sec) ( RTT_MS_TO_TICKS((sec) * 1000) )
/**
* @brief Convert minutes to rtt ticks
* @param[in] min number of minutes
* @return rtt ticks
*/
#define RTT_MIN_TO_TICKS(min) ( RTT_SEC_TO_TICKS((min) * 60) )
/**
* @brief Signature for the alarm callback
*