System message variable display time + setting option

docs/Settings.md

@@ -4582,6 +4582,16 @@ Auto swap display time interval between disarm stats pages (seconds). Reverts to
 
 ---
 
+### osd_system_msg_display_time
+
+System message display cycle time for multiple messages (milliseconds).
+
+| Default | Min | Max |
+| --- | --- | --- |
+| 1000 | 500 | 5000 |
+
+---
+
 ### osd_telemetry
 
 To enable OSD telemetry for antenna tracker. Possible values are `OFF`, `ON` and `TEST`

src/main/fc/settings.yaml

@@ -3470,6 +3470,13 @@ groups:
         max: 6
         default_value: 3
 
+      - name: osd_system_msg_display_time
+        description: System message display cycle time for multiple messages (milliseconds).
+        field: system_msg_display_time
+        default_value: 1000
+        min: 500
+        max: 5000
+
   - name: PG_OSD_COMMON_CONFIG
     type: osdCommonConfig_t
     headers: ["io/osd_common.h"]

src/main/io/osd.c

@@ -3208,7 +3208,7 @@ PG_RESET_TEMPLATE(osdConfig_t, osdConfig,
     .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,
-
+    .system_msg_display_time = SETTING_OSD_SYSTEM_MSG_DISPLAY_TIME_DEFAULT,
     .units = SETTING_OSD_UNITS_DEFAULT,
     .main_voltage_decimals = SETTING_OSD_MAIN_VOLTAGE_DECIMALS_DEFAULT,
 
@@ -4165,6 +4165,18 @@ displayCanvas_t *osdGetDisplayPortCanvas(void)
     return NULL;
 }
 
+timeMs_t systemMessageCycleTime(unsigned messageCount, const char **messages){
+    uint8_t i = 0;
+    float factor = 1.0f;
+    while (i < messageCount) {
+        if ((float)strlen(messages[i]) / 15.0f > factor) {
+            factor = (float)strlen(messages[i]) / 15.0f;
+        }
+        i++;
+    }
+    return osdConfig()->system_msg_display_time * factor;
+}
+
 textAttributes_t osdGetSystemMessage(char *buff, size_t buff_size, bool isCenteredText)
 {
     textAttributes_t elemAttr = TEXT_ATTRIBUTES_NONE;
@@ -4292,7 +4304,7 @@ textAttributes_t osdGetSystemMessage(char *buff, size_t buff_size, bool isCenter
         }
 
         if (messageCount > 0) {
-            message = messages[OSD_ALTERNATING_CHOICES(1000, messageCount)];
+            message = messages[OSD_ALTERNATING_CHOICES(systemMessageCycleTime(messageCount, messages), messageCount)];
             if (message == failsafeInfoMessage) {
                 // failsafeInfoMessage is not useful for recovering
                 // a lost model, but might help avoiding a crash.

src/main/io/osd.h

@@ -391,6 +391,7 @@ typedef struct osdConfig_s {
     uint8_t pan_servo_index;            // Index of the pan servo used for home direction offset
     int8_t pan_servo_pwm2centideg;      // Centidegrees of servo rotation per us pwm
     uint8_t crsf_lq_format;
+    uint16_t system_msg_display_time;   // system message display time for multiple messages (ms)
     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.