Configures the automatic PRS LNA bypass.
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t.
Public Attributes#
Maximum time in microseconds to wait for frame detection after the LNA has been bypassed.
Threshold (without unit) from which LNA bypass is turned on.
Compensation in dB applied by RAIL to RSSI during LNA bypass.
PRS Channel used for the bypass.
PRS signal polarity for bypass.
Public Attribute Documentation#
timeoutUs#
uint32_t RAIL_PrsLnaBypassConfig_t::timeoutUs
Maximum time in microseconds to wait for frame detection after the LNA has been bypassed.
It must be greater than 0 to enable automatic PRS LNA bypass with RAIL_EnablePrsLnaBypass().
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t::timeout_us.
threshold#
uint8_t RAIL_PrsLnaBypassConfig_t::threshold
Threshold (without unit) from which LNA bypass is turned on.
The table below shows EFR32XG25 thresholds corresponding to received power level without the LNA gain.
Level dBm | FSK_1a | FSK_1b | FSK_2a | FSK_2b | FSK_3 | FSK_4a | FSK_4b | FSK_5 | OFDM1 | OFDM2 | OFDM3 | OFDM4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
-25 | 9 | 9 | 9 | 10 | ||||||||
-20 | 7 | 7 | 7 | 8 | 8 | 7 | 8 | 11 | 12 | 12 | 12 | |
-15 | 7 | 10 | 10 | 10 | 9 | 9 | 10 | 10 | 14 | 14 | 14 | 15 |
-10 | 9 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 16 | 16 | 16 | 16 |
-5 | 11 | 14 | 14 | 14 | 16 | 16 | 14 | 16 | ||||
0 | 14 | 17 | 18 | 17 | 17 | 18 | 18 | 18 |
For example, with OFDM1 PHY, setting the threshold to 11 will turn on the bypass when the power level at EFR32XG25 input is greater than -20 dBm.
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t::threshold.
deltaRssiDbm#
uint8_t RAIL_PrsLnaBypassConfig_t::deltaRssiDbm
Compensation in dB applied by RAIL to RSSI during LNA bypass.
The RSSI offset set using RAIL_SetRssiOffset() must corespond to the case with FEM LNA not bypassed. deltaRssiDbm is typically the FEM LNA gain value.
Note
This field's units are dB not dBm; it was misnamed and retains Dbm suffix for backward compatibility.
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t::delta_rssi_db.
prsChannel#
uint8_t RAIL_PrsLnaBypassConfig_t::prsChannel
PRS Channel used for the bypass.
PRS_GetFreeChannel() can be use to find a free channel. Then the signal can be routed to GPIO pin and port using PRS_PinOutput(). This allows logical operations with other PRS channels and so to adapt to the FEM control logic table. Any call to PRS_Combine() with RAIL_PrsLnaBypassConfig_t::prsChannel as chA must be done after the RAIL_EnablePrsLnaBypass() call.
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t::prs_channel.
polarity#
bool RAIL_PrsLnaBypassConfig_t::polarity
PRS signal polarity for bypass.
With a polarity of 1, PRS signal is set to 1 for bypass and 0 for un-bypass. with a polarity of 0, PRS signal is set to 0 for bypass and 1 for un-bypass.
DeprecatedRAIL 2.x synonym of sl_rail_prs_lna_bypass_config_t::polarity.