add rockprog interface

owrx/source/fifi_sdr.py

@@ -1,5 +1,10 @@
 from owrx.command import Option
 from .direct import DirectSource
+from subprocess import Popen
+
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class FifiSdrSource(DirectSource):
@@ -13,4 +18,20 @@ class FifiSdrSource(DirectSource):
         return super().getEventNames() + ["device"]
 
     def getFormatConversion(self):
-        return ["csdr convert_s16_f", "csdr gain_ff 30"]
+        return ["csdr convert_s16_f", "csdr gain_ff 30"]
+
+    def sendRockProgFrequency(self, frequency):
+        process = Popen(["echo", "--vco", "-w", "--", "freq={}".format(frequency / 1E6)])
+        process.communicate()
+        rc = process.wait()
+        if rc != 0:
+            logger.warning("rockprog failed to set frequency; rc=%i", rc)
+
+    def preStart(self):
+        values = self.getCommandValues()
+        self.sendRockProgFrequency(values["tuner_freq"])
+
+    def onPropertyChange(self, name, value):
+        if name != "center_freq":
+            return
+        self.sendRockProgFrequency(value)