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cpu/nrf52: fix RSSI calculation in nrf802154_radio

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This commit is contained in:
Mikolai Gütschow 2024-08-28 11:40:44 +02:00
parent b056060bd8
commit 076dcefb92
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1 changed files with 7 additions and 4 deletions
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11
cpu/nrf52/radio/nrf802154/nrf802154_radio.c
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@ -337,10 +337,13 @@ static int _read(ieee802154_dev_t *dev, void *buf, size_t max_size,
radio_info->lqi = (uint8_t)(hwlqi > UINT8_MAX/ED_RSSISCALE
? UINT8_MAX
: hwlqi * ED_RSSISCALE);
/* We calculate RSSI from LQI, since it's already 8-bit
saturated (see page 321 of product spec v1.1) */
radio_info->rssi = _hwval_to_ieee802154_dbm(radio_info->lqi)
+ IEEE802154_RADIO_RSSI_OFFSET;
/* Converting the hardware-provided LQI value back to the
original RSSI value is not properly documented in the PS.
The linear mapping used here has been found empirically
through comparison with the RSSI value provided by NRF_RADIO->RSSISAMPLE
after enabling the ADDRESS_RSSISTART short. */
int8_t rssi_dbm = hwlqi + ED_RSSIOFFS - 1;
radio_info->rssi = ieee802154_dbm_to_rssi(rssi_dbm);
}
memcpy(buf, &rxbuf[1], pktlen);
}