From 35bde9bccb1ed1163db99eeaea8854605ce7e136 Mon Sep 17 00:00:00 2001
From: Federico Amedeo Izzo <federico@izzo.pro>
Date: Sun, 21 Feb 2021 16:44:31 +0100
Subject: [PATCH] Add state_terminate() that saves settings to flash

---
 openrtx/include/state.h | 6 ++++++
 openrtx/src/state.c     | 6 ++++++
 openrtx/src/ui/ui.c     | 7 +++++++
 3 files changed, 19 insertions(+)

diff --git a/openrtx/include/state.h b/openrtx/include/state.h
index 141770bd..2b3b7806 100644
--- a/openrtx/include/state.h
+++ b/openrtx/include/state.h
@@ -121,6 +121,12 @@ extern state_t state;
  */
 void state_init();
 
+/**
+ * This function terminates the Radio state,
+ * Saving persistent settings to flash.
+ */
+void state_terminate();
+
 /**
  * This function applies the selected timezone after reading the time from
  * the RTC.
diff --git a/openrtx/src/state.c b/openrtx/src/state.c
index a893e548..7d1e714a 100644
--- a/openrtx/src/state.c
+++ b/openrtx/src/state.c
@@ -90,6 +90,12 @@ void state_init()
     }
 }
 
+void state_terminate()
+{
+    // Write settings to flash memory
+    nvm_writeSettings(&state.settings);
+}
+
 void state_applyTimezone()
 {
     if(state.time.hour + state.settings.utc_timezone >= 24) 
diff --git a/openrtx/src/ui/ui.c b/openrtx/src/ui/ui.c
index 29b63647..b8bc1d31 100644
--- a/openrtx/src/ui/ui.c
+++ b/openrtx/src/ui/ui.c
@@ -696,6 +696,13 @@ void ui_saveState()
 
 void ui_updateFSM(event_t event, bool *sync_rtx)
 {
+    // The volume knob has been set to OFF, shutdown the radio
+    if(state.v_bat <= 0)
+    {
+        state_terminate();
+        platform_terminate();
+        return;
+    }
     // Check if battery has enough charge to operate
     float charge = battery_getCharge(state.v_bat);
     if (!state.emergency && charge <= 0)