show time domain range

plot.c

@@ -701,12 +701,17 @@ trace_get_info(int t, char *buf, int len)
   }
 }
 
+static float time_of_index(int idx) {
+   return 1.0 / (float)(frequencies[1] - frequencies[0]) / 128.0 * idx;
+}
+
 static float distance_of_index(int idx) {
 #define SPEED_OF_LIGHT 299792458
    float distance = ((float)idx * (float)SPEED_OF_LIGHT) / ( (float)(frequencies[1] - frequencies[0]) * 128.0 * 2.0);
    return distance * (velocity_factor / 100.0);
 }
 
+
 static inline void
 mark_map(int x, int y)
 {
@@ -1377,7 +1382,7 @@ cell_draw_marker_info(int m, int n, int w, int h)
       frequency_string(buf, sizeof buf, frequencies[idx]);
       cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
   } else {
-      chsnprintf(buf, sizeof buf, "%.1f m (VF=%d%%)", distance_of_index(idx), velocity_factor);
+      chsnprintf(buf, sizeof buf, "%d ns %.1f m", (uint16_t)(time_of_index(idx) * 1e9), distance_of_index(idx));
       cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
   }
 
@@ -1421,6 +1426,7 @@ void
 draw_frequencies(void)
 {
   char buf[24];
+  if ((domain_mode & DOMAIN_MODE) == DOMAIN_FREQ) {
       if (frequency1 > 0) {
         int start = frequency0;
         int stop = frequency1;
@@ -1453,6 +1459,15 @@ draw_frequencies(void)
         chsnprintf(buf, 24, "                             ");
         ili9341_drawstring_5x7(buf, 205, 233, 0xffff, 0x0000);
       }
+  } else {
+      strcpy(buf, "START 0s        ");
+      ili9341_drawstring_5x7(buf, OFFSETX, 233, 0xffff, 0x0000);
+
+      strcpy(buf, "STOP ");
+      chsnprintf(buf+5, 24-5, "%d ns", (uint16_t)(time_of_index(101) * 1e9));
+      strcat(buf, "          ");
+      ili9341_drawstring_5x7(buf, 205, 233, 0xffff, 0x0000);
+  }
 }
 
 void

ui.c

@@ -695,6 +695,7 @@ menu_transform_cb(int item)
       } else {
           domain_mode = (domain_mode & ~DOMAIN_MODE) | DOMAIN_TIME;
       }
+      draw_frequencies();
       ui_mode_normal();
       break;
     case 1: