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Merge pull request #126 from andrzej-kaczmarek/phy-late-wfr-fix

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nimble/phy: Fix late wfr setup
This commit is contained in:
Andrzej Kaczmarek
2018-06-04 15:52:31 +02:00
committed by GitHub
parent 6691ddd7d6 5de98708c1
commit 2d7c900c5a
1 changed files with 18 additions and 0 deletions
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nimble/drivers/nrf52/src/ble_phy.c
+18
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@@ -673,6 +673,24 @@ ble_phy_wfr_enable(int txrx, uint8_t tx_phy_mode, uint32_t wfr_usecs)
/* Enable the disabled interrupt so we time out on events compare */
NRF_RADIO->INTENSET = RADIO_INTENSET_DISABLED_Msk;
/*
* It may happen that if CPU is halted for a brief moment (e.g. during flash
* erase or write), TIMER0 already counted past CC[3] and thus wfr will not
* fire as expected. In case this happened, let's just disable PPIs for wfr
* and trigger wfr manually (i.e. disable radio).
*
* Note that the same applies to RX start time set in CC[0] but since it
* should fire earlier than wfr, fixing wfr is enough.
*
* CC[1] is only used as a reference on RX start, we do not need it here so
* it can be used to read TIMER0 counter.
*/
NRF_TIMER0->TASKS_CAPTURE[1] = 1;
if (NRF_TIMER0->CC[1] > NRF_TIMER0->CC[3]) {
NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk;
NRF_RADIO->TASKS_DISABLE = 1;
}
}
#if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION)