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gnrc/lorawan: Express timer drift in per mille instead of percentage

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This commit is contained in:
Leandro Lanzieri 2019-12-11 12:07:20 +01:00
parent 7d4082a6a3
commit 449da7602d
2 changed files with 4 additions and 4 deletions
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6
sys/include/net/gnrc/lorawan.h
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@ -35,15 +35,15 @@ extern "C" {
* @{
*/
/**
* @brief maximum timer drift in percentage
* @brief maximum timer drift in per mille
*
* @note this is only a workaround to compensate inaccurate timers.
*
* E.g a value of 0.1 means there's a positive drift of 0.1% (set timeout to
* E.g a value of 1 means there's a positive drift of 0.1% (set timeout to
* 1000 ms => triggers after 1001 ms)
*/
#ifndef CONFIG_GNRC_LORAWAN_TIMER_DRIFT
#define CONFIG_GNRC_LORAWAN_TIMER_DRIFT 1
#define CONFIG_GNRC_LORAWAN_TIMER_DRIFT 10
#endif
/**

2
sys/net/gnrc/link_layer/lorawan/gnrc_lorawan.c
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@ -30,7 +30,7 @@
/* This factor is used for converting "real" seconds into microcontroller
* microseconds. This is done in order to correct timer drift.
*/
#define _DRIFT_FACTOR (int) (US_PER_SEC * 100 / (100 + CONFIG_GNRC_LORAWAN_TIMER_DRIFT))
#define _DRIFT_FACTOR (int) (US_PER_SEC * 100 / (100 + (CONFIG_GNRC_LORAWAN_TIMER_DRIFT / 10.0)))
#define GNRC_LORAWAN_DL_RX2_DR_MASK (0x0F) /**< DL Settings DR Offset mask */
#define GNRC_LORAWAN_DL_RX2_DR_POS (0) /**< DL Settings DR Offset pos */