I am using USRP2 witht RFX2400 and I need to estimate the value of rssi
to get the info of channel。
“I assume you are using the XCVR2450 when dealing with 802.11.
If so,you can access the rssi output from the maxim chip directly with
the aux adc (ad7922) on the USRP2. You can add the lsadc_read_rx()
command in
the firmware to get the adc output and then pass the 12 bits through the
metadata.word0 to the host. The rest of the adc output to dBm estimation
can be done on the host side.”
As mentioned above，I learned that lsadc_read_rx() command in the
firmware and metadata.word0 can complete this task，but I donot know the
details of the operation，Can anyone explain in detail？I do not even know
how to use the C code in the firmware.