From 1c53e3b1fb8dea4465ac6ff79e73bb9317752d81 Mon Sep 17 00:00:00 2001
From: Tuomas Kuosmanen <tuomas.kuosmanen@gmail.com>
Date: Wed, 31 Jan 2024 00:01:49 +0200
Subject: [PATCH] added setContrast method for the oled

---
 GNC255/GNC255.cpp | 10 +++++++++-
 GNC255/GNC255.h   |  2 ++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/GNC255/GNC255.cpp b/GNC255/GNC255.cpp
index ddb2af0..c81aed8 100644
--- a/GNC255/GNC255.cpp
+++ b/GNC255/GNC255.cpp
@@ -110,6 +110,9 @@ void GNC255::set(int16_t messageID, const char *data)
     case 5: // set COM/NAV mode
         setMode(strcmp(data, "0") == 0);
         break;
+    case 6: // set contrast (brightness) of OLED
+        setContrast(atoi(data));
+        break;
     default:
         break;
     }
@@ -164,4 +167,9 @@ void GNC255::_renderLabel(const char *text, Label label, Position offset, bool u
 
     _oledDisplay->print(text);
     if (update) _oledDisplay->sendBuffer();
-}
\ No newline at end of file
+}
+
+void GNC255::setContrast(uint8_t displayContrast)
+{
+    _oledDisplay->setContrast(displayContrast);
+}
diff --git a/GNC255/GNC255.h b/GNC255/GNC255.h
index f197f45..00a9888 100644
--- a/GNC255/GNC255.h
+++ b/GNC255/GNC255.h
@@ -44,6 +44,7 @@ class GNC255
     bool                                 _hasChanged;
     char                                 activeFrequency[8]  = "123.456";
     char                                 standbyFrequency[8] = "123.456";
+    uint8_t                              displayContrast = 32;
 
     void _update();
     void _stop();
@@ -53,4 +54,5 @@ class GNC255
     void updateActiveLabel(const char *frequency);
     void updateStandbyLabel(const char *frequency);
     void _renderLabel(const char *text, Label label, Position offset, bool update = false);
+    void setContrast(uint8_t displayContrast);
 };