diff options
Diffstat (limited to 'host/lib')
| -rw-r--r-- | host/lib/usrp/dboard/db_xcvr2450.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/host/lib/usrp/dboard/db_xcvr2450.cpp b/host/lib/usrp/dboard/db_xcvr2450.cpp index 9d25b30a5..70b0bbabd 100644 --- a/host/lib/usrp/dboard/db_xcvr2450.cpp +++ b/host/lib/usrp/dboard/db_xcvr2450.cpp @@ -152,12 +152,21 @@ private: * \return the rssi in dB */ double get_rssi(void){ + //*FIXME* RSSI depends on LNA Gain Setting (datasheet pg 16 top middle chart) + double max_power; + switch(_max2829_regs.rx_lna_gain){ + case 0: + case 1: max_power = 0; break; + case 2: max_power = -15; break; + case 3: max_power = -30.5; break; + } + //constants for the rssi calculation static const double min_v = 0.5, max_v = 2.5; static const double rssi_dyn_range = 60; //calculate the rssi from the voltage double voltage = this->get_iface()->read_aux_adc(dboard_iface::UNIT_RX, dboard_iface::AUX_ADC_B); - return rssi_dyn_range*(voltage - min_v)/(max_v - min_v); + return max_power - rssi_dyn_range*(voltage - min_v)/(max_v - min_v); } }; @@ -621,7 +630,7 @@ void xcvr2450::rx_get(const wax::obj &key_, wax::obj &val){ if (key.name == "lo_locked") val = sensor_value_t("LO", this->get_locked(), "locked", "unlocked"); else if (key.name == "rssi") - val = sensor_value_t("RSSI", this->get_rssi(), "dB"); + val = sensor_value_t("RSSI", this->get_rssi(), "dBm"); else UHD_THROW_INVALID_CODE_PATH(); return; |