Added selectable precision to the OSD RPM

docs/Settings.md

@@ -4122,6 +4122,16 @@ Value above which to make the OSD distance from home indicator blink (meters)
 
 ---
 
+### osd_esc_rpm_precision
+
+Number of characters used to display the RPM value.
+
+| Default | Min | Max |
+| --- | --- | --- |
+| 3 | 3 | 6 |
+
+---
+
 ### osd_esc_temp_alarm_max
 
 Temperature above which the IMU temperature OSD element will start blinking (decidegrees centigrade)

src/main/fc/settings.yaml

@@ -3340,7 +3340,6 @@ groups:
         description: "How many navigation waypoints are displayed, set to 0 (zero) to disable. As sample, if set to 2, and you just passed the 3rd waypoint of the mission, you'll see markers for the 4th waypoint (marked 1) and the 5th waypoint (marked 2)"
         default_value: 0
         field: hud_wp_disp
-
         min: 0
         max: 3
       - name: osd_left_sidebar_scroll
@@ -3476,6 +3475,13 @@ groups:
         min: -36
         max: 36
 
+      - name: osd_esc_rpm_precision
+        description: Number of characters used to display the RPM value.
+        field: esc_rpm_precision
+        min: 3
+        max: 6
+        default_value: 3
+
   - name: PG_OSD_COMMON_CONFIG
     type: osdCommonConfig_t
     headers: ["io/osd_common.h"]

src/main/io/osd.c

@@ -1037,17 +1037,37 @@ static void osdFormatRpm(char *buff, uint32_t rpm)
 {
     buff[0] = SYM_RPM;
     if (rpm) {
-        if (rpm >= 1000) {
-            osdFormatCentiNumber(buff + 1, rpm / 10, 0, 1, 1, 2);
-            buff[3] = 'K';
-            buff[4] = '\0';
+        if ( digitCount(rpm) > osdConfig()->esc_rpm_precision) {
+            uint8_t rpmMaxDecimals = (osdConfig()->esc_rpm_precision - 3);
+            osdFormatCentiNumber(buff + 1, rpm / 10, 0, rpmMaxDecimals, rpmMaxDecimals, osdConfig()->esc_rpm_precision-1);
+            buff[osdConfig()->esc_rpm_precision] = 'K';
+            buff[osdConfig()->esc_rpm_precision+1] = '\0';
         }
         else {
-            tfp_sprintf(buff + 1, "%3lu", rpm);
+            switch(osdConfig()->esc_rpm_precision) {
+                case 6:
+                    tfp_sprintf(buff + 1, "%6lu", rpm);
+                    break;
+                case 5:
+                    tfp_sprintf(buff + 1, "%5lu", rpm);
+                    break;
+                case 4:
+                    tfp_sprintf(buff + 1, "%4lu", rpm);
+                    break;
+                case 3:
+                default:
+                    tfp_sprintf(buff + 1, "%3lu", rpm);
+                    break;
+            }
+
+
         }
     }
     else {
-        strcpy(buff + 1, "---");
+        uint8_t buffPos = 1;
+        while (buffPos <=( osdConfig()->esc_rpm_precision)) {
+            strcpy(buff + buffPos++, "-");
+        }
     }
 }
 #endif
@@ -3148,6 +3168,7 @@ PG_RESET_TEMPLATE(osdConfig_t, osdConfig,
     .osd_home_position_arm_screen = SETTING_OSD_HOME_POSITION_ARM_SCREEN_DEFAULT,
     .pan_servo_index = SETTING_OSD_PAN_SERVO_INDEX_DEFAULT,
     .pan_servo_pwm2centideg = SETTING_OSD_PAN_SERVO_PWM2CENTIDEG_DEFAULT,
+    .esc_rpm_precision = SETTING_OSD_ESC_RPM_PRECISION_DEFAULT,
 
     .units = SETTING_OSD_UNITS_DEFAULT,
     .main_voltage_decimals = SETTING_OSD_MAIN_VOLTAGE_DECIMALS_DEFAULT,

src/main/io/osd.h

@@ -383,6 +383,7 @@ typedef struct osdConfig_s {
     uint8_t crsf_lq_format;
     uint8_t sidebar_height;             // sidebar height in rows, 0 turns off sidebars leaving only level indicator arrows
     uint8_t telemetry; 				    // use telemetry on displayed pixel line 0
+    uint8_t esc_rpm_precision;          // Number of characters used for the RPM numbers.
 
 } osdConfig_t;