From 0aa636d9578b39fe7506328b47e5e731e9d3671c Mon Sep 17 00:00:00 2001
From: BigTire <pourv@pourv.cz>
Date: Tue, 13 Dec 2022 20:57:17 +0100
Subject: [PATCH] Added storing GUI variables in the memory of the Core.

---
 multithreading/multiThread/multiThread.ino | 44 ++++++++++++++--------
 1 file changed, 29 insertions(+), 15 deletions(-)

diff --git a/multithreading/multiThread/multiThread.ino b/multithreading/multiThread/multiThread.ino
index d1abd6e..502c86f 100644
--- a/multithreading/multiThread/multiThread.ino
+++ b/multithreading/multiThread/multiThread.ino
@@ -3,6 +3,13 @@
 #include <BluetoothSerial.h>  // Bluetooth
 #include <M5Core2.h>
 #include "icons.cpp"  // icons
+#include <Preferences.h>
+
+// store screen mode and brightness in the memory of the Core
+Preferences preferences;
+const char* key1 = "lightDark";
+const char* key2 = "brightness";
+int lightMode;
 
 // UART communication variables
 #define RX_PIN 19
@@ -11,7 +18,8 @@ String stringReceived = "";
 int valueReceived = 0;
 
 // GUI variables
-int brightnessValue = 1;
+int brightnessValues[4] = {2500, 2750, 2900, 3150};
+int brightnessValue;
 ButtonColors noDraw = { NODRAW, NODRAW, NODRAW };
 Button screenModeButton(0, 190, 50, 50, false, "", noDraw);
 Button brightnessButton(65, 190, 50, 50, false, "", noDraw);
@@ -19,8 +27,8 @@ Button restartButton(200, 191, 45, 50, false, "", noDraw);
 Button powerOffButton(260, 186, 55, 55, false, "", noDraw);
 boolean buttonPressed = false;
 
-enum screenMode { DARK, LIGHT };
-screenMode COLOR_MODE = LIGHT;
+enum screenMode {DARK, LIGHT};
+screenMode COLOR_MODE;
 
 uint16_t COLORS[2] = { WHITE, BLACK };
 
@@ -60,7 +68,14 @@ TaskHandle_t TaskHandle_2;
 
 void setup() {
   M5.begin();
-  M5.Axp.SetLcdVoltage(3150);                       // Set initial brightness
+  preferences.begin("Key");
+  Serial.print(preferences.getUInt(key1));
+  if (preferences.getUInt(key1) == 0) {
+    COLOR_MODE = DARK;
+  } else {
+    COLOR_MODE = LIGHT;
+  }
+  M5.Axp.SetLcdVoltage(brightnessValues[preferences.getUInt(key2)]); // Set initial brightness
   Serial2.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);  // UART communication
 
   // MULTITHREADING
@@ -334,8 +349,10 @@ void screenModeHandler(Event &e) {
   M5.Axp.SetLDOEnable(3, false);
   if (COLOR_MODE == DARK) {
     COLOR_MODE = LIGHT;
+    preferences.putUInt(key1, 1);
   } else {
     COLOR_MODE = DARK;
+    preferences.putUInt(key1, 0);
   }
 
   buttonPressed = true;
@@ -489,24 +506,21 @@ void brightnessHandler(Event &e) {
   M5.Axp.SetLDOEnable(3, true);
   delay(125);
   M5.Axp.SetLDOEnable(3, false);
-  switch (brightnessValue) {
+  switch (preferences.getUInt(key2)) {
+    case 0:
+      preferences.putUInt(key2, 1);
+      break;
     case 1:
-      M5.Axp.SetLcdVoltage(2500);
-      brightnessValue += 1;
+      preferences.putUInt(key2, 2);
       break;
     case 2:
-      M5.Axp.SetLcdVoltage(2750);
-      brightnessValue += 1;
+      preferences.putUInt(key2, 3);
       break;
     case 3:
-      M5.Axp.SetLcdVoltage(2900);
-      brightnessValue += 1;
-      break;
-    case 4:
-      M5.Axp.SetLcdVoltage(3150);
-      brightnessValue = 1;
+      preferences.putUInt(key2, 0);
       break;
   }
+  M5.Axp.SetLcdVoltage(brightnessValues[preferences.getUInt(key2)]);
 }
 
 void restartHandler(Event &e) {