ScriptsAPI: added a script to control DATV receiver for QO-100 wideband downlink

scriptsapi/Readme.md

@@ -58,6 +58,18 @@ In this example we have a Rx device on index 0 and a Tx device on index 1. All s
 
 Important: you should initiate switch over by stopping the active device and not by starting the other.
 
+<h2>qo100_datv.py</h2>
+
+Quick control of configuration for receiving QO-100 DATV to rapidly follow spotted activity on [BATC web sdr](https://eshail.batc.org.uk/wb/)
+
+Options are:
+  - `-h` or `--help` show this help message and exit
+  - `-a` or `--address` address and port of SDRangel instance API. Default: 127.0.0.1:8091
+  - `-d` or `--device` index of device set. Default 0
+  - `-c` or `--channel` index of DATV demod channel. Default 0
+  - `-f` or `--frequency` device center frequency (kHz). Mandatory. Ex: 491500
+  - `-s` or `--symbol-rate` symbol rate (kS/s). Mandatory. Ex: 1500
+
 <h2>config.py</h2>
 
 Sends a sequence of commands recorded in a JSON file which is in the form of a list of commands.

scriptsapi/qo100_datv.py

@@ -0,0 +1,171 @@
+#!/usr/bin/env python3
+"""
+Quick control of configuration for receiving QO-100 DATV
+"""
+
+import requests, traceback, sys, json, time
+from optparse import OptionParser
+import sdrangel
+
+base_url_pattern = "http://{0}/sdrangel"
+base_url = None
+
+# ======================================================================
+def getInputOptions():
+    """ Parse options """
+# ----------------------------------------------------------------------
+    parser = OptionParser(usage="usage: %%prog [-t]\n")
+    parser.add_option("-a", "--address", dest="address", help="Address and port. Default: 127.0.0.1:8091", metavar="ADDRESS", type="string")
+    parser.add_option("-d", "--device", dest="device_index", help="Index of device set. Default 0", metavar="INT", type="int")
+    parser.add_option("-c", "--channel", dest="channel_index", help="Index of DATV demod channel. Default 0", metavar="INT", type="int")
+    parser.add_option("-f", "--frequency", dest="frequency", help="Device center frequency (kHz). Mandatory", metavar="INT", type="int")
+    parser.add_option("-s", "--symbol-rate", dest="symbol_rate", help="Symbol rate (kS/s). Mandatory", metavar="INT", type="int")
+
+    (options, args) = parser.parse_args()
+
+    if options.address is None:
+        options.address = "127.0.0.1:8091"
+    if options.device_index is None:
+        options.device_index = 0
+    if options.channel_index is None:
+        options.channel_index = 0
+    if options.frequency is None:
+        raise RuntimeError("Frequency (-f or --frequency) is mandatory")
+    if options.symbol_rate is None:
+        raise RuntimeError("Symbol rate (-s or --symbol-rate) is mandatory")
+
+    return options
+
+# ======================================================================
+def change_center_frequency(content, new_frequency):
+    """ Change center frequency searching recursively """
+# ----------------------------------------------------------------------
+    for k in content:
+        if isinstance(content[k], dict):
+            change_center_frequency(content[k], new_frequency)
+        elif k == "centerFrequency":
+            content[k] = new_frequency
+
+# ======================================================================
+def change_decim(content, new_decim):
+    """ Change log2 decimation searching recursively """
+# ----------------------------------------------------------------------
+    for k in content:
+        if isinstance(content[k], dict):
+            change_decim(content[k], new_decim)
+        elif k == "log2Decim":
+            content[k] = new_decim
+
+# ======================================================================
+def change_rfbw(content, new_rfbw):
+    """ Change RF bandwidth searching recursively """
+# ----------------------------------------------------------------------
+    for k in content:
+        if isinstance(content[k], dict):
+            change_rfbw(content[k], new_rfbw)
+        elif k == "rfBandwidth":
+            content[k] = new_rfbw
+
+# ======================================================================
+def change_symbol_rate(content, new_symbol_rate):
+    """ Change symbol rate searching recursively """
+# ----------------------------------------------------------------------
+    for k in content:
+        if isinstance(content[k], dict):
+            change_symbol_rate(content[k], new_symbol_rate)
+        elif k == "symbolRate":
+            content[k] = new_symbol_rate
+
+# ======================================================================
+def get_device_sr_and_decim(hwtype, settings):
+    """ Return device sample rate and decimation """
+# ----------------------------------------------------------------------
+    if hwtype == "Airspy" or hwtype == "AirspyHF":
+        sr_index = settings.get("devSampleRateIndex", 0)
+        if sr_index == 1:
+            sr = 3000000
+        else:
+            sr = 6000000
+        log2_decim = settings.get("log2Decim", 0)
+    else:
+        sr = settings.get("devSampleRate", 0)
+        log2_decim = settings.get("log2Decim", 0)
+    return sr, 1<<log2_decim
+
+# ======================================================================
+def calc_decim(device_sr, symbol_rate):
+    """ Calculate ideal decimation and return as log2 """
+# ----------------------------------------------------------------------
+    quot = device_sr // (2*symbol_rate*1000)
+    for i in range(6):
+        if quot < 1<<i:
+            break
+    return 0 if i < 1 else i - 1
+
+# ======================================================================
+def set_device(options):
+    """ Set the device """
+# ----------------------------------------------------------------------
+    device_settings_url = f"{base_url}/deviceset/{options.device_index}/device/settings"
+    r = requests.get(url=device_settings_url)
+    if r.status_code // 100 == 2: # OK
+        rj = r.json()
+        hwtype = rj.get("deviceHwType", None)
+        device_settings = rj.get(sdrangel.DEVICE_TYPES[hwtype]["settings"], None)
+        device_sr, device_decim = get_device_sr_and_decim(hwtype, device_settings)
+        new_decim = calc_decim(device_sr, options.symbol_rate)
+        print(f"sr: {device_sr} S/s decim: {device_decim} new decim: {1<<new_decim}")
+        change_decim(rj, new_decim)
+        change_center_frequency(rj, options.frequency*1000)
+        r = requests.patch(url=device_settings_url, json=rj)
+        if r.status_code / 100 == 2:
+            print(f'set_device: changed {options.device_index}: frequency: {options.frequency} kHz log2Decim: {new_decim}')
+        else:
+            raise RuntimeError(f'set_device: failed to change device {options.device_index} with error {r.status_code}')
+    else:
+        raise RuntimeError(f"Cannot get device info for device set index {options.device_index} HTTP return code {r.status_code}")
+
+# ======================================================================
+def set_channel(options):
+    """ Set the channel - assume DATV demod """
+# ----------------------------------------------------------------------
+    channel_settings_url = f"{base_url}/deviceset/{options.device_index}/channel/{options.channel_index}/settings"
+    r = requests.get(url=channel_settings_url)
+    if r.status_code // 100 == 2: # OK
+        rj = r.json()
+        rfbw = round(1.5*options.symbol_rate)*1000
+        change_center_frequency(rj, 0)
+        change_rfbw(rj, rfbw)
+        change_symbol_rate(rj, options.symbol_rate*1000)
+        r = requests.patch(url=channel_settings_url, json=rj)
+        if r.status_code / 100 == 2:
+            print(f'set_channel: changed {options.device_index}:{options.channel_index}: rfbw: {rfbw} Hz symbol rate: {options.symbol_rate} kS/s')
+        else:
+            raise RuntimeError(f'set_device: failed to change channel {options.device_index}:{options.channel_index} with error {r.status_code}')
+    else:
+        raise RuntimeError(f"Cannot get channel info for channel {options.device_index}:{options.channel_index} HTTP return code {r.status_code}")
+
+
+# ======================================================================
+def main():
+    """ Main program """
+# ----------------------------------------------------------------------
+    try:
+        options = getInputOptions()
+
+        global base_url
+        base_url =  base_url_pattern.format(options.address)
+        print(f"Frequency: 10{options.frequency/1000} MHz Symbol rate: {options.symbol_rate} kS/s")
+        set_device(options)
+        set_channel(options)
+
+    except Exception as ex:
+        tb = traceback.format_exc()
+        print(tb, file=sys.stderr)
+
+# ======================================================================
+if __name__ == "__main__":
+    main()
+
+
+

scriptsapi/sdrangel.py

@@ -4,10 +4,18 @@ Constants that refer to SDRangel software
 
 # Device keys depending on hardware type (deviceHwType)
 DEVICE_TYPES = {
+    "Airspy": {
+        "settings": "airspySettings",
+        "cf_key": "centerFrequency",
+    },
     "AirspyHF": {
         "settings": "airspyHFSettings",
         "cf_key": "centerFrequency",
-    }
+    },
+    "RTLSDR": {
+        "settings": "rtlSdrSettings",
+        "cf_key": "centerFrequency",
+    },
 }
 
 # Channel keys depending on channel type (id)
@@ -27,6 +35,11 @@ CHANNEL_TYPES = {
         "df_key": "inputFrequencyOffset",
         "mute_key": "decodeActive"
     },
+    "DATVDemod": {
+        "settings": "DATVDemodSettings",
+        "df_key": "centerFrequency",
+        "mute_key": "audioMute"
+    },
     "DSDDemod": {
         "settings": "DSDDemodSettings",
         "df_key": "inputFrequencyOffset",