more refinements as per Jakob Ketterl suggestions

owrx/source/perseussdr.py

@@ -3,29 +3,37 @@ from owrx.command import Flag, Option
 
 
 #
-# perseustest -s 768000 -u 0 -f 14150000 -r-|csdr convert_s8_f|nmux --bufsize 192512 --bufcnt 260 --port 35989 --address 127.0.0.1
-# perseustest -a -t0    -o -
-# perseustest -d 9 -a -t 100000 -o -  -s 768000 -u 0 -f 14150000 -r-
+# In order to interface Perseus hardware, we resolve to use the
+# perseustest utility that comes with libperseus-sdr support package.
+# Below the base options used are shown:
+#
+# -p output    I/Q samples as 32 bits floating point
+# -d -1        suppress debug messages
+# -a           don't test attenuators on startup
+# -t 0         runs indefinitely
+# -o -         output samples on stdout
+#
+# As we are already returning I/Q samples as pairs of 32 bits
+# floating points (option -p),no need for further conversions,
+# so the method getFormatConversion(self) is not implemented at all.
 
 class PerseussdrSource(DirectSource):
     def getCommandMapper(self):
-        return super().getCommandMapper().setBase("perseustest -p -d -1 -a -t 100000 -o -  ").setMappings(
+        return super().getCommandMapper().setBase("perseustest -p -d -1 -a -t 0 -o -  ").setMappings(
             {
                 "samp_rate": Option("-s"),
                 "tuner_freq": Option("-f"),
-                "rf_gain": Option("-u"),
-                "lna_gain": Option("-g"),
-                "rf_amp": Option("-x"),
+                "attenuator": Option("-u"),
+                "adc_preamp": Option("-m"),
+                "adc_dither": Option("-x"),
+                "wideband": Option("-w"),
             }
-        ).setStatic("-r-")
+        )
 
     def getEventNames(self):
         return super().getEventNames() + [
-            "lna_gain",
-            "rf_amp",
+            "attenuator",
+            "adc_preamp",
+            "adc_dither",
+            "wideband",
         ]
-
-    def getFormatConversion(self):
-#        return ["csdr convert_s24_f --bigendian"]
-#        return ["csdr convert_s24_f", "csdr gain_ff 20"]
-        return ["csdr gain_ff 20"]