Add variable sweep point support

main.c

@@ -736,7 +736,7 @@ void load_default_properties(void)
 //current_props.magic = CONFIG_MAGIC;
   current_props._frequency0   =     50000;    // start =  50kHz
   current_props._frequency1   = 900000000;    // end   = 900MHz
-  current_props._sweep_points = POINTS_COUNT;
+  current_props._sweep_points = POINTS_SET_101; // Set default 101 points
   current_props._cal_status   = 0;
 //This data not loaded by default
 //current_props._cal_data[5][POINTS_COUNT][2];
@@ -900,6 +900,17 @@ result:
   shell_printf("bandwidth %d (%uHz)\r\n", config.bandwidth, get_bandwidth_frequency());
 }
 
+void set_sweep_points(uint16_t points){
+  if (points == sweep_points || points > POINTS_COUNT)
+    return;
+
+  sweep_points = points;
+  update_frequencies();
+
+  if (cal_auto_interpolate && (cal_status & CALSTAT_APPLY))
+    cal_interpolate(lastsaveid);
+}
+
 VNA_SHELL_FUNCTION(cmd_scan)
 {
   uint32_t start, stop;
@@ -922,6 +933,7 @@ VNA_SHELL_FUNCTION(cmd_scan)
       shell_printf("sweep points exceeds range "define_to_STR(POINTS_COUNT)"\r\n");
       return;
     }
+    sweep_points = points;
   }
 
   set_frequencies(start, stop, points);
@@ -1110,8 +1122,10 @@ VNA_SHELL_FUNCTION(cmd_sweep)
   }
   uint32_t value0 = 0;
   uint32_t value1 = 0;
+  uint32_t value2 = 0;
   if (argc >= 1) value0 = my_atoui(argv[0]);
   if (argc >= 2) value1 = my_atoui(argv[1]);
+  if (argc >= 3) value2 = my_atoui(argv[2]);
 #if MAX_FREQ_TYPE != 5
 #error "Sweep mode possibly changed, check cmd_sweep function"
 #endif
@@ -1130,9 +1144,11 @@ VNA_SHELL_FUNCTION(cmd_sweep)
     set_sweep_frequency(ST_START, value0);
   if (value1)
     set_sweep_frequency(ST_STOP, value1);
+  if (value2)
+    set_sweep_points(value2);
   return;
 usage:
-  shell_printf("usage: sweep {start(Hz)} [stop(Hz)]\r\n"\
+  shell_printf("usage: sweep {start(Hz)} [stop(Hz)] [points]\r\n"\
                "\tsweep {%s} {freq(Hz)}\r\n", sweep_cmd);
 }
 
@@ -1401,6 +1417,11 @@ cal_collect(int type)
   uint8_t bw = config.bandwidth;  // store current setting
   if (bw < BANDWIDTH_100)
     config.bandwidth = BANDWIDTH_100;
+
+  // Set MAX settings for sweep_points on calibrate
+//  if (sweep_points != POINTS_COUNT)
+//    set_sweep_points(POINTS_COUNT);
+
   sweep(false);
   config.bandwidth = bw;          // restore
   // Copy calibration data

plot.c

@@ -1614,7 +1614,7 @@ draw_frequencies(void)
     buf2[0] = S_SARROW[0];
   ili9341_drawstring(buf1, FREQUENCIES_XPOS1, FREQUENCIES_YPOS);
   ili9341_drawstring(buf2, FREQUENCIES_XPOS2, FREQUENCIES_YPOS);
-  plot_printf(buf1, sizeof(buf1), "bw:%uHz", get_bandwidth_frequency());
+  plot_printf(buf1, sizeof(buf1), "bw:%uHz %up", get_bandwidth_frequency(), sweep_points);
   ili9341_set_foreground(DEFAULT_GRID_COLOR);
   ili9341_drawstring(buf1, FREQUENCIES_XPOS3, FREQUENCIES_YPOS);
 }

ui.c

@@ -43,8 +43,8 @@ uistat_t uistat = {
 
 #define BUTTON_DOWN_LONG_TICKS      5000   /* 1sec */
 #define BUTTON_DOUBLE_TICKS         2500   /* 500ms */
-#define BUTTON_REPEAT_TICKS         500    /* 100ms */
-#define BUTTON_DEBOUNCE_TICKS       400    /* 80ms */
+#define BUTTON_REPEAT_TICKS         200    /*  40ms */
+#define BUTTON_DEBOUNCE_TICKS       100    /*  20ms */
 
 /* lever switch assignment */
 #define BIT_UP1     3
@@ -485,7 +485,7 @@ menu_config_cb(int item, uint8_t data)
   case 1:
       touch_draw_test();
       break;
-  case 3:
+  case 4:
       show_version();
       break;
   }
@@ -628,6 +628,14 @@ menu_bandwidth_cb(int item, uint8_t data)
   draw_menu();
 }
 
+static void
+menu_points_cb(int item, uint8_t data)
+{
+  (void)item;
+  set_sweep_points(data);
+  draw_menu();
+}
+
 static void 
 choose_active_marker(void)
 {
@@ -946,6 +954,13 @@ const menuitem_t menu_display[] = {
   { MT_NONE, 0, NULL, NULL } // sentinel
 };
 
+const menuitem_t menu_sweep_points[] = {
+  { MT_CALLBACK, POINTS_SET_51,  " 51 points", menu_points_cb },
+  { MT_CALLBACK, POINTS_SET_101, "101 points", menu_points_cb },
+  { MT_CANCEL, 0, S_LARROW" BACK", NULL },
+  { MT_NONE, 0, NULL, NULL } // sentinel
+};
+
 const menuitem_t menu_stimulus[] = {
   { MT_CALLBACK, 0, "START", menu_stimulus_cb },
   { MT_CALLBACK, 0, "STOP", menu_stimulus_cb },
@@ -1383,6 +1398,11 @@ menu_item_modify_attribute(const menuitem_t *menu, int item,
        *bg = 0x0000;
        *fg = 0xffff;
      }
+  } else if (menu == menu_sweep_points) {
+    if (menu_sweep_points[item].data == sweep_points) {
+       *bg = 0x0000;
+       *fg = 0xffff;
+     }
   } else if (menu == menu_transform) {
     if ((item == 0 && (domain_mode & DOMAIN_MODE) == DOMAIN_TIME)
        || (item == 1 && (domain_mode & TD_FUNC) == TD_FUNC_LOWPASS_IMPULSE)