Move low battery screen into main FSM

openrtx/include/state.h

@@ -52,6 +52,8 @@ typedef struct
     uint8_t rtxStatus;
     uint8_t sqlLevel;
     uint8_t voxLevel;
+
+    bool emergency;
 }
 state_t;
 

openrtx/include/ui.h

@@ -39,7 +39,8 @@ enum uiScreen
     MENU_CONTACTS,
     MENU_SMS,
     MENU_GPS,
-    MENU_SETTINGS
+    MENU_SETTINGS,
+    LOW_BAT
 };
 
 /**

openrtx/src/main.c

@@ -28,28 +28,6 @@
 #include <graphics.h>
 #include <hwconfig.h>
 
-/* If battery level is below 0% draw low battery screen, wait and shutdown */
-void check_battery()
-{
-    OS_ERR os_err;
-
-    // Check battery percentage
-    float vbat = platform_getVbat();
-    float charge = battery_getCharge(vbat);
-
-    // Draw low battery screen
-    if (charge <= 0)
-    {
-        ui_drawLowBatteryScreen();
-        gfx_render();
-
-        // Wait 5 seconds
-        OSTimeDlyHMSM(0u, 0u, 5u, 0u, OS_OPT_TIME_HMSM_STRICT, &os_err);
-
-        // TODO: Shut down radio unless a button is pressed
-    }
-}
-
 int main(void)
 {
     OS_ERR os_err;
@@ -63,9 +41,6 @@ int main(void)
     // Initialize user interface
     ui_init();
 
-    // Check if battery has enough charge to operate
-    check_battery();
-
     // Display splash screen
     ui_drawSplashScreen();
     gfx_render();
@@ -83,7 +58,7 @@ int main(void)
     // Auxiliary functions loop
     while(true)
     {
-        check_battery();
-        OSTimeDlyHMSM(0u, 1u, 0u, 0u, OS_OPT_TIME_HMSM_STRICT, &os_err);
+        // No low-frequency function at the moment
+        OSTaskSuspend(NULL, &os_err);
     }
 }

openrtx/src/state.c

@@ -44,4 +44,6 @@ void state_init()
     state.rtxStatus = RTX_OFF;
     state.sqlLevel = 0;
     state.voxLevel = 0;
+
+    state.emergency = false;
 }

openrtx/src/ui.c

@@ -354,7 +354,7 @@ void ui_drawSplashScreen()
     #endif
 }
 
-void ui_drawLowBatteryScreen()
+bool _ui_drawLowBatteryScreen()
 {
     gfx_clearScreen();
     uint16_t bat_width = SCREEN_WIDTH / 2;
@@ -375,10 +375,23 @@ void ui_drawLowBatteryScreen()
               FONT_SIZE_6PT,
               TEXT_ALIGN_CENTER,
               color_white);
+    return true;
 }
 
 void ui_updateFSM(event_t event)
 {
+    // Check if battery has enough charge to operate
+    float charge = battery_getCharge(state.v_bat);
+    if (!state.emergency && charge <= 0)
+    {
+        state.ui_screen = LOW_BAT;
+        if(event.type == EVENT_KBD && event.payload) {
+            state.ui_screen = MAIN_VFO;
+            state.emergency = true;
+        }
+        return;
+    }
+
     // Process pressed keys
     if(event.type == EVENT_KBD)
     {
@@ -440,6 +453,10 @@ bool ui_updateGUI(state_t last_state)
         case MENU_TOP:
             screen_update = _ui_drawMenuTop();
             break;
+        // Low battery screen
+        case LOW_BAT:
+            screen_update = _ui_drawLowBatteryScreen();
+            break;
     }
     return screen_update;
 }