fix: keep freq mode in each save slot

main.c

@@ -779,7 +779,6 @@ config_t config = {
   .trace_color =       { DEFAULT_TRACE_1_COLOR, DEFAULT_TRACE_2_COLOR, DEFAULT_TRACE_3_COLOR, DEFAULT_TRACE_4_COLOR },
 //  .touch_cal =         { 693, 605, 124, 171 },  // 2.4 inch LCD panel
   .touch_cal =         { 338, 522, 153, 192 },  // 2.8 inch LCD panel
-  .freq_mode = FREQ_MODE_START_STOP,
   .harmonic_freq_threshold = 300000000,
   .vbat_offset = 500
 };
@@ -819,6 +818,8 @@ void load_default_properties(void)
   current_props._active_marker   = 0;
   current_props._domain_mode     = 0;
   current_props._marker_smith_format = MS_RLC;
+  current_props._freq_mode = FREQ_MODE_START_STOP;
+
 //Checksum add on caldata_save
 //current_props.checksum = 0;
 }
@@ -1003,7 +1004,7 @@ set_sweep_frequency(int type, uint32_t freq)
   ensure_edit_config();
   switch (type) {
     case ST_START:
-      config.freq_mode &= ~FREQ_MODE_CENTER_SPAN;
+      freq_mode &= ~FREQ_MODE_CENTER_SPAN;
       if (frequency0 != freq) {
         frequency0 = freq;
         // if start > stop then make start = stop
@@ -1011,7 +1012,7 @@ set_sweep_frequency(int type, uint32_t freq)
       }
       break;
     case ST_STOP:
-      config.freq_mode &= ~FREQ_MODE_CENTER_SPAN;
+      freq_mode &= ~FREQ_MODE_CENTER_SPAN;
       if (frequency1 != freq) {
         frequency1 = freq;
         // if start > stop then make start = stop
@@ -1019,7 +1020,7 @@ set_sweep_frequency(int type, uint32_t freq)
       }
       break;
     case ST_CENTER:
-      config.freq_mode |= FREQ_MODE_CENTER_SPAN;
+      freq_mode |= FREQ_MODE_CENTER_SPAN;
       uint32_t center = frequency0 / 2 + frequency1 / 2;
       if (center != freq) {
         uint32_t span = frequency1 - frequency0;
@@ -1034,7 +1035,7 @@ set_sweep_frequency(int type, uint32_t freq)
       }
       break;
     case ST_SPAN:
-      config.freq_mode |= FREQ_MODE_CENTER_SPAN;
+      freq_mode |= FREQ_MODE_CENTER_SPAN;
       if (frequency1 - frequency0 != freq) {
         uint32_t center = frequency0 / 2 + frequency1 / 2;
         if (center < START_MIN + freq / 2) {
@@ -1048,7 +1049,7 @@ set_sweep_frequency(int type, uint32_t freq)
       }
       break;
     case ST_CW:
-      config.freq_mode |= FREQ_MODE_CENTER_SPAN;
+      freq_mode |= FREQ_MODE_CENTER_SPAN;
       if (frequency0 != freq || frequency1 != freq) {
         frequency0 = freq;
         frequency1 = freq;

nanovna.h

@@ -230,7 +230,6 @@ typedef struct config {
   uint16_t menu_active_color;
   uint16_t trace_color[TRACES_MAX];
   int16_t  touch_cal[4];
-  int8_t   freq_mode;
   uint32_t harmonic_freq_threshold;
   uint16_t vbat_offset;
   uint8_t _reserved[22];
@@ -380,7 +379,8 @@ typedef struct properties {
   uint8_t _domain_mode; /* 0bxxxxxffm : where ff: TD_FUNC m: DOMAIN_MODE */
   uint8_t _marker_smith_format;
   uint8_t _bandwidth;
-  uint8_t _reserved[50];
+  int8_t _freq_mode;
+  uint8_t _reserved[49];
   uint32_t checksum;
 } properties_t;
 
@@ -407,9 +407,10 @@ extern properties_t current_props;
 #define velocity_factor current_props._velocity_factor
 #define marker_smith_format current_props._marker_smith_format
 #define bandwidth current_props._bandwidth
+#define freq_mode current_props._freq_mode
 
-#define FREQ_IS_STARTSTOP() (!(config.freq_mode&FREQ_MODE_CENTER_SPAN))
+#define FREQ_IS_STARTSTOP() (!(freq_mode & FREQ_MODE_CENTER_SPAN))
-#define FREQ_IS_CENTERSPAN() (config.freq_mode&FREQ_MODE_CENTER_SPAN)
+#define FREQ_IS_CENTERSPAN() (freq_mode & FREQ_MODE_CENTER_SPAN)
 #define FREQ_IS_CW() (frequency0 == frequency1)
 
 int caldata_save(int id);