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cpu/nrf52/nrf802154_radio: fix rssi calculation

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Francisco Molina 2020-12-11 13:56:37 +01:00
parent f8bc934785
commit 6d4d00ebe9
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GPG Key ID: 3E94EAC3DBDEEDA8
1 changed files with 4 additions and 5 deletions
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cpu/nrf52/radio/nrf802154/nrf802154_radio.c
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@ -230,11 +230,10 @@ static int _read(ieee802154_dev_t *dev, void *buf, size_t max_size,
radio_info->lqi = (uint8_t)(hwlqi > UINT8_MAX/ED_RSSISCALE radio_info->lqi = (uint8_t)(hwlqi > UINT8_MAX/ED_RSSISCALE
? UINT8_MAX ? UINT8_MAX
: hwlqi * ED_RSSISCALE); : hwlqi * ED_RSSISCALE);
/* Calculate RSSI by subtracting the offset from the datasheet. /* We calculate RSSI from LQI, since it's already 8-bit
* Intentionally using a different calculation than the one from saturated (see page 321 of product spec v1.1) */
* figure 122 of the v1.1 product specification. This appears to radio_info->rssi = _hwval_to_ieee802154_dbm(radio_info->lqi)
* match real world performance better */ + IEEE802154_RADIO_RSSI_OFFSET;
radio_info->rssi = _hwval_to_ieee802154_dbm(hwlqi) + IEEE802154_RADIO_RSSI_OFFSET;
} }
memcpy(buf, &rxbuf[1], pktlen); memcpy(buf, &rxbuf[1], pktlen);
} }