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[nrf528xx] improve CSL phase calculation (#6287)

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Fill a CSL Phase IE with a value for the CSL transmitter to aim at the
center of the receive window, instead of aiming at the beginning.
This commit is contained in:
Eduardo Montoya
2021-03-16 11:28:53 -07:00
committed by GitHub
parent 818a774bcf
commit 636e87f510
1 changed files with 7 additions and 6 deletions
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examples/platforms/nrf528xx/src/radio.c
+7 -6
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@@ -51,7 +51,6 @@
#include <platform-config.h>
#include <openthread/platform/alarm-micro.h>
#include <openthread/platform/diag.h>
#include <openthread/platform/logging.h>
#include <openthread/platform/radio.h>
#include <openthread/platform/time.h>
@@ -119,9 +118,10 @@ static uint8_t sEnergyDetectionChannel;
static int8_t sEnergyDetected;
#if OPENTHREAD_CONFIG_MAC_CSL_RECEIVER_ENABLE
static uint32_t sCslPeriod;
static uint32_t sCslSampleTime;
static const uint8_t sCslIeHeader[OT_IE_HEADER_SIZE] = {CSL_IE_HEADER_BYTES_LO, CSL_IE_HEADER_BYTES_HI};
static uint32_t sCslPeriod;
static uint32_t sCslSampleTime;
static const uint32_t sCslSampleDur = OPENTHREAD_CONFIG_CSL_SAMPLE_WINDOW * OT_US_PER_TEN_SYMBOLS;
static const uint8_t sCslIeHeader[OT_IE_HEADER_SIZE] = {CSL_IE_HEADER_BYTES_LO, CSL_IE_HEADER_BYTES_HI};
#endif // OPENTHREAD_CONFIG_MAC_CSL_RECEIVER_ENABLE
typedef enum
@@ -1068,8 +1068,9 @@ static uint16_t getCslPhase()
{
uint32_t curTime = otPlatAlarmMicroGetNow();
uint32_t cslPeriodInUs = sCslPeriod * OT_US_PER_TEN_SYMBOLS;
uint32_t diff = (cslPeriodInUs - (curTime % cslPeriodInUs) + (sCslSampleTime % cslPeriodInUs)) % cslPeriodInUs;
uint32_t diff =
(cslPeriodInUs - (curTime % cslPeriodInUs) + (sCslSampleTime % cslPeriodInUs) + (sCslSampleDur / 2)) %
cslPeriodInUs;
return (uint16_t)(diff / OT_US_PER_TEN_SYMBOLS + 1);
}
#endif