From c057f8a097cf3e6374e0a1dfe09b49b07e1bc3b5 Mon Sep 17 00:00:00 2001
From: Krzysiek Egzmont <egzumer@gmail.com>
Date: Thu, 2 Nov 2023 01:46:07 +0100
Subject: [PATCH] FIX #74: limit spectrum analyzer RSSI trigger values

---
 app/spectrum.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/app/spectrum.c b/app/spectrum.c
index 8f32126..2e30d0f 100644
--- a/app/spectrum.c
+++ b/app/spectrum.c
@@ -401,11 +401,24 @@ static void Measure() { rssiHistory[scanInfo.i] = scanInfo.rssi = GetRssi(); }
 
 // Update things by keypress
 
+static uint16_t dbm2rssi(int dBm)
+{
+  return (dBm + 160)*2;
+}
+
+static void ClampRssiTriggerLevel()
+{
+  settings.rssiTriggerLevel = clamp(settings.rssiTriggerLevel, dbm2rssi(settings.dbMin), dbm2rssi(settings.dbMax));
+}
+
 static void UpdateRssiTriggerLevel(bool inc) {
   if (inc)
-    settings.rssiTriggerLevel += 2;
+      settings.rssiTriggerLevel += 2;
   else
-    settings.rssiTriggerLevel -= 2;
+      settings.rssiTriggerLevel -= 2;
+
+  ClampRssiTriggerLevel();
+
   redrawScreen = true;
   redrawStatus = true;
 }
@@ -418,6 +431,8 @@ static void UpdateDBMax(bool inc) {
   } else {
     return;
   }
+
+  ClampRssiTriggerLevel();
   redrawStatus = true;
   redrawScreen = true;
   SYSTEM_DelayMs(20);