diff options
Diffstat (limited to 'apps/grgsm_trx')
| -rwxr-xr-x | apps/grgsm_trx | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/apps/grgsm_trx b/apps/grgsm_trx index 1c0581f..45312e6 100755 --- a/apps/grgsm_trx +++ b/apps/grgsm_trx @@ -25,6 +25,8 @@ import signal import getopt import sys +from gnuradio import eng_notation + from grgsm.trx import ctrl_if_bb from grgsm.trx import radio_if from grgsm.trx import fake_pm @@ -45,6 +47,7 @@ class Application: # PHY specific phy_sample_rate = 4 * 1625000 / 6 + phy_freq_offset_hz = None phy_tx_antenna = "TX/RX" phy_rx_antenna = "RX2" phy_rx_gain = 30 @@ -67,6 +70,10 @@ class Application: self.bind_addr, self.remote_addr, self.base_port) + # Optional frequency offset + if self.phy_freq_offset_hz is not None: + self.radio.freq_offset_hz = self.phy_freq_offset_hz + # Power measurement emulation # Noise: -120 .. -105 # BTS: -75 .. -50 @@ -110,6 +117,7 @@ class Application: " -G --tx-gain Set TX gain (default %d)\n" \ " --rx-antenna Set RX antenna (default %s)\n" \ " --tx-antenna Set TX antenna (default %s)\n" \ + " --freq-offset Shift baseband freq. (e.g. -500M)\n" \ " --ppm Set frequency correction (default %d)\n" print(s % ( @@ -128,7 +136,7 @@ class Application: "i:b:p:a:s:g:G:h", ["help", "remote-addr=", "bind-addr=", "base-port=", "device-args=", "sample-rate=", "rx-gain=", "tx-gain=", - "ppm=", "rx-antenna=", "tx-antenna="]) + "ppm=", "rx-antenna=", "tx-antenna=", "freq-offset="]) except getopt.GetoptError as err: # Print(help and exit) self.print_help() @@ -167,6 +175,10 @@ class Application: self.phy_tx_antenna = v elif o in ("--ppm"): self.phy_ppm = int(v) + elif o in ("--freq-offset"): + # Convert /\d+(\.\d+)?(M|k)?/ to Hz + offset_hz = eng_notation.str_to_num(v) + self.phy_freq_offset_hz = offset_hz def sig_handler(self, signum, frame): print("Signal %d received" % signum) |