Added i0; and i1; options to invert the screen

Author: arduinoenigma

EnigmaQRClock.ino

@@ -70,6 +70,7 @@ byte secs = 0;
 byte ampm = 0;
 byte update = 1;
 byte rotation = 0;
+byte invert = 0;
 
 byte xo = 15;
 byte yo = 55;
@@ -149,6 +150,24 @@ void advancetime()
   }
 }
 
+void clearScreen()
+{
+  uint16_t color = 0;
+
+  clearPrevQR();
+
+  if (invert)
+  {
+    color = WHITE;
+  }
+  else
+  {
+    color = BLACK;
+  }
+
+  Tft.fillScreen(color);
+}
+
 void clearPrevQR()
 {
   for (byte i = 0; i < 21; i++)
@@ -161,15 +180,15 @@ void setup() {
   Serial.begin(9600);
   Tft.TFTinit();
 
-  Serial.println(F("valid init string is: r1;h15;m22;s25;u10;d;x;"));
+  Serial.println(F("valid init string is: i0;r2;h15;m22;s25;u1;d;x;"));
 
   ul_UpdateMillis = update * (unsigned long)1000;
 
   buildtimestring();
   generate();
   ul_LastGenerated = millis();
 
-  clearPrevQR();
+  clearScreen();
   printcode(&outputmatrix[0]);
 
   advancetime();

SerialMenu.ino

@@ -77,6 +77,16 @@ void SerialFSM()
           break;
         }
 
+        // invert colors
+      case 'I':
+      case 'i':
+        {
+          collectednumber = 0;
+          numberstocollect = 1;
+          storenumbersin = 7;
+          break;
+        }
+
         // draw the time
       case 'D':
       case 'd':
@@ -171,8 +181,6 @@ void SerialFSM()
                 {
                   if (collectednumber < 4)
                   {
-                    clearPrevQR();
-
                     rotation = collectednumber;
 
                     if ((rotation == 0) || (rotation == 2))
@@ -187,19 +195,25 @@ void SerialFSM()
                     }
 
                     Tft.setRotation(rotation);
-                    Tft.fillScreen(BLACK);
+                    clearScreen();
+                    printcode(&outputmatrix[0]);
+                  }
+                  break;
+                }
+              case 7:
+                {
+                  if ((collectednumber == 0) || (collectednumber == 1))
+                  {
+                    invert = collectednumber;
+                    clearScreen();
                     printcode(&outputmatrix[0]);
                   }
                   break;
                 }
             }
-
           }
-
           break;
         }
     }
-
-
   }
 }

choofQR.ino

@@ -46,8 +46,22 @@ void printcode(unsigned char * array)
   int i = 0;
   int j = 0;
   uint16_t color = 0;
+  uint16_t colorbg = 0;
+  uint16_t colorfg = 0;
+  
   byte c = 0;
   unsigned long mbit = 1;
+  
+  if (invert)
+  {
+    colorbg = WHITE;
+    colorfg = BLACK;
+  }
+  else
+  {
+    colorbg = BLACK;
+    colorfg = WHITE;    
+  }
 
   for (i = 0; i < 21; i++)
   {
@@ -57,12 +71,12 @@ void printcode(unsigned char * array)
     {
       if (getbit(&array[0], (21 * i) + j))
       {
-        color = BLACK;
+        color = colorbg;
         c = 0;
       }
       else
       {
-        color = WHITE;
+        color = colorfg;
         c = 1;
       }