Added function menu latch.

1. If the moni key is long pressed by itself (no digit), function key latches.
2. It remains latched for 3 seconds.
3. If a subsequent key is pressed during this time, the timer is restarted at 3 seconds again, allowing the user to say increase the ctcss code while keeping the function latched.
4. If no key is pressed, the timer is allowed to lapse and the function unlatched.

openrtx/src/ui/ui.c

@@ -79,6 +79,20 @@
 #include <hwconfig.h>
 #include "core/voicePromptUtils.h"
 
+// 0 not latched, a positive number start timer which counts down to 0 at which 
+// time latch automatically disabled.
+// If a subsequent key is pressed before timeout, timer restarts.
+static uint16_t functionLatched = 0;
+// 3000 ms.
+#define FUNCTION_LATCH_TIMEOUT 3000
+// When a key is pressed while Moni is latched, the latch timer is restarted.
+static void RestartFunctionLatchTimer()
+{
+	if (functionLatched == 0) return;
+	
+	functionLatched = FUNCTION_LATCH_TIMEOUT;
+}
+
 /* UI main screen functions, their implementation is in "ui_main.c" */
 extern void _ui_drawMainBackground();
 extern void _ui_drawMainTop();
@@ -139,7 +153,7 @@ const char *settings_items[] =
     "GPS",
 #endif
     "M17",
-	"Voice",
+	"Accessibility",
     "Default Settings"
 };
 
@@ -792,6 +806,8 @@ bool _ui_exitStandby(long long now)
 void _ui_fsm_menuMacro(kbd_msg_t msg, bool *sync_rtx)
 {
     ui_state.input_number = input_getPressedNumber(msg);
+	if (ui_state.input_number != 0)
+		RestartFunctionLatchTimer(); // reset the timer.
     // CTCSS Encode/Decode Selection
     bool tone_tx_enable = state.channel.fm.txToneEn;
     bool tone_rx_enable = state.channel.fm.rxToneEn;
@@ -880,6 +896,7 @@ void _ui_fsm_menuMacro(kbd_msg_t msg, bool *sync_rtx)
         state.settings.sqlLevel = platform_getChSelector() - 1;
         *sync_rtx = true;
 		announceSquelch(state.settings.sqlLevel, queueFlags);
+		RestartFunctionLatchTimer(); // reset the timer.
     }
 
     if(msg.keys & KEY_LEFT || msg.keys & KEY_DOWN)
@@ -893,6 +910,7 @@ void _ui_fsm_menuMacro(kbd_msg_t msg, bool *sync_rtx)
             state.settings.sqlLevel -= 1;
             *sync_rtx = true;
 			announceSquelch(state.settings.sqlLevel, queueFlags);
+			RestartFunctionLatchTimer(); // reset the timer.
         }
     }
 
@@ -907,6 +925,7 @@ void _ui_fsm_menuMacro(kbd_msg_t msg, bool *sync_rtx)
             state.settings.sqlLevel += 1;
             *sync_rtx = true;
 			announceSquelch(state.settings.sqlLevel, queueFlags);
+			RestartFunctionLatchTimer(); // reset the timer.
         }
     }
 }
@@ -1065,9 +1084,22 @@ void ui_updateFSM(bool *sync_rtx)
             return;
 
         // If MONI is pressed, activate MACRO functions
-        if(msg.keys & KEY_MONI)
+		bool moniPressed=(msg.keys & KEY_MONI) ? true : false;
+        if(moniPressed || (functionLatched > 0))
         {
             macro_menu = true;
+			// long press moni on its own latches function.
+			if (moniPressed && msg.long_press && !input_getPressedNumber(msg))
+			{
+				functionLatched = FUNCTION_LATCH_TIMEOUT; // 3000 ms.
+				// Need to play beep to alert latch state enabled.
+			}
+			else if (functionLatched > 0)
+			{
+				functionLatched--; // count down.
+				//if (functionLatched==0)
+					// need to beep to alert latch timed out.
+			}
             _ui_fsm_menuMacro(msg, sync_rtx);
             return;
         }