Add SWR get_level to K3 (KX3, KX2)

Capabilities, level_gran and k3_get_level

rigs/kenwood/k3.c

@@ -63,7 +63,8 @@
 #define KX3_LEVEL_ALL (RIG_LEVEL_ATT|RIG_LEVEL_PREAMP|RIG_LEVEL_AGC|RIG_LEVEL_SQL|\
     RIG_LEVEL_STRENGTH|RIG_LEVEL_RFPOWER|RIG_LEVEL_KEYSPD|\
     RIG_LEVEL_AF|RIG_LEVEL_RF|RIG_LEVEL_MICGAIN|RIG_LEVEL_COMP|\
-    RIG_LEVEL_NR|RIG_LEVEL_MONITOR_GAIN|RIG_LEVEL_RAWSTR|RIG_LEVEL_RFPOWER_METER|RIG_LEVEL_RFPOWER_METER_WATTS)
+    RIG_LEVEL_NR|RIG_LEVEL_MONITOR_GAIN|RIG_LEVEL_RAWSTR|RIG_LEVEL_RFPOWER_METER|\
+    RIG_LEVEL_RFPOWER_METER_WATTS|RIG_LEVEL_SWR)
 
 /*
  * Elecraft K3/K3S extra level definitions
@@ -2313,6 +2314,18 @@ int k3_get_level(RIG *rig, vfo_t vfo, setting_t level, value_t *val)
 
         break;
 
+    case RIG_LEVEL_SWR:
+        retval = kenwood_safe_transaction(rig, "SW", levelbuf, sizeof(levelbuf), 5);
+
+        if (retval != RIG_OK)
+        {
+          return retval;
+        }
+
+        sscanf(levelbuf + 2, "%d", &val->i);
+        val->f = (float) val->i / 10.0f;
+        break;
+
     default:
         return kenwood_get_level(rig, vfo, level, val);
     }

rigs/kenwood/level_gran_elecraft.h

@@ -27,4 +27,5 @@
         [LVL_COMP]          = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/100.0f } },
         [LVL_VOXGAIN]       = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/100.0f } },
         [LVL_ALC]           = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/100.0f } },
+        [LVL_SWR]           = { .min = { .f = 1.0 },   .max = { .f = 99.9 }, .step = { .f = 1.0f/10.0f  } },