From 74eaed2ff54ab7b677a91d7da0ca456957eb0e98 Mon Sep 17 00:00:00 2001
From: Jens Noack <jnoack@>
Date: Sun, 18 Oct 2020 15:56:43 +0200
Subject: [PATCH] Added fading function to brigthness

---
 .../OmobiLEDdisplayBluetooth/include/LedDisplayController.h  | 1 +
 vscode/OmobiLEDdisplayBluetooth/src/LedDisplayController.cpp | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/vscode/OmobiLEDdisplayBluetooth/include/LedDisplayController.h b/vscode/OmobiLEDdisplayBluetooth/include/LedDisplayController.h
index 899932c..a48b268 100644
--- a/vscode/OmobiLEDdisplayBluetooth/include/LedDisplayController.h
+++ b/vscode/OmobiLEDdisplayBluetooth/include/LedDisplayController.h
@@ -91,6 +91,7 @@ public:
     bool setBrightness(int brightness);
 
 private:
+
     // matrix objects
     TaskHandle_t displayUpdateTask;
     NeoPixelBrightnessBusGfx<NeoGrbFeature, Neo800KbpsMethod> *matrix;
diff --git a/vscode/OmobiLEDdisplayBluetooth/src/LedDisplayController.cpp b/vscode/OmobiLEDdisplayBluetooth/src/LedDisplayController.cpp
index ec13925..dfea509 100644
--- a/vscode/OmobiLEDdisplayBluetooth/src/LedDisplayController.cpp
+++ b/vscode/OmobiLEDdisplayBluetooth/src/LedDisplayController.cpp
@@ -2,7 +2,8 @@
 
 LedDisplayController *ledDisplayControllerGlobal = nullptr;
 
-
+static const uint8_t StepsFade  = 255;
+static const float RFade        = (StepsFade*log10(2))/log10(255);
 
 // --------------------
 // - Public functions -
@@ -188,7 +189,7 @@ void LedDisplayController::disp_scroll_text()
 void LedDisplayController::show_matrix(const char *text, int pos, const char *color)
 {
     //Serial.printf("TEXT: %s (pos=%d, color=%d)\n", text, pos, this->colorFromHex(String(color)));
-    this->matrix->SetBrightness(this->text_sets.disp_brightness);
+    this->matrix->SetBrightness(pow (2, (this->text_sets.disp_brightness / RFade)) - 1);
     this->matrix->setTextColor(this->colorFromHex(String(color)));
     this->matrix->setCursor(pos, 0);
     this->matrix->print(text);