get_signal_path_loss correction use integer values

nanovna.h

@@ -887,7 +887,7 @@ typedef int16_t  pureRSSI_t;
 // External programm zero level settings (need decrease on this value -)
 #define EXT_ZERO_LEVEL            (128)
 #define DEVICE_TO_PURE_RSSI(rssi) ((rssi)<<4)
-#define float_TO_PURE_RSSI(rssi)  ((rssi)*32.0)
+#define float_TO_PURE_RSSI(rssi)  ((rssi)*32)
 #define PURE_TO_float(rssi)       ((rssi)/32.0)
 
 extern uint16_t actual_rbw_x10;

sa_core.c

@@ -350,14 +350,14 @@ float get_attenuation(void)
   return(setting.attenuate);
 }
 
-static float get_signal_path_loss(void){
+static pureRSSI_t get_signal_path_loss(void){
 #ifdef __ULTRA__
   if (setting.mode == M_ULTRA)
-    return -15;       // Loss in dB, -9.5 for v0.1, -12.5 for v0.2
+    return float_TO_PURE_RSSI(-15);       // Loss in dB, -9.5 for v0.1, -12.5 for v0.2
 #endif
   if (setting.mode == M_LOW)
-    return -5.5;      // Loss in dB, -9.5 for v0.1, -12.5 for v0.2
-  return +7;          // Loss in dB (+ is gain)
+    return float_TO_PURE_RSSI(-5.5);      // Loss in dB, -9.5 for v0.1, -12.5 for v0.2
+  return float_TO_PURE_RSSI(+7);          // Loss in dB (+ is gain)
 }
 
 static const int drive_dBm [16] = {-38,-35,-33,-30,-27,-24,-21,-19,-7,-4,-2, 1, 4, 7, 10, 13};
@@ -1438,10 +1438,10 @@ pureRSSI_t perform(bool break_on_operation, int i, uint32_t f, int tracking)
   if (MODE_INPUT(setting.mode)){ // only cases where the value can change on 0 point of sweep
     if (i == 0){
       correct_RSSI = getSI4432_RSSI_correction()
+                   - get_signal_path_loss()
                + float_TO_PURE_RSSI(
                      + get_level_offset()
                      +  get_attenuation()
-                     -  get_signal_path_loss()
                      -  setting.offset);
     }
     if (i == 0 || setting.frequency_step != 0)