Merge pull request #3683 from tonhuisman/feature/p057-support-period-to-display

[P057] Add support for periods in display

lib/HT16K33/HT16K33.cpp

@@ -68,7 +68,7 @@ uint16_t CHT16K33::GetRow(uint8_t com)
     return 0;
 };
 
-void CHT16K33::SetDigit(uint8_t com, uint8_t c)
+void CHT16K33::SetDigit(uint8_t com, uint8_t c, bool setDot)
 {
   uint16_t value = 0;
 
@@ -115,6 +115,9 @@ void CHT16K33::SetDigit(uint8_t com, uint8_t c)
       value = 0x40;
       break;
   }
+  if (setDot) {
+    value |= 0x80;  // Set the dot-bit
+  }
 
   SetRow(com, value);
 }

lib/HT16K33/HT16K33.h

@@ -13,7 +13,7 @@ class CHT16K33 {
   void ClearRowBuffer(void);
   void SetRow(uint8_t com, uint16_t data);
   uint16_t GetRow(uint8_t com);
-  void SetDigit(uint8_t com, uint8_t c);
+  void SetDigit(uint8_t com, uint8_t c, bool setDot = false);
 
   // LED output and control
   void SetBrightness(uint8_t b);

src/_P057_HT16K33_LED.ino

@@ -180,17 +180,21 @@ boolean Plugin_057(uint8_t function, struct EventStruct *event, String& string)
       {
         String text = parseStringToEnd(string, 2);
 
-        if (text.length() > 0) {
+        if (!text.isEmpty()) {
           uint8_t seg = 0;
+          uint8_t txt = 0; // Separate indexers for text and segments
+          bool    setDot;
 
           P057_data->ledMatrix.ClearRowBuffer();
 
-          while (text[seg] && seg < 8)
+          while (txt < text.length() && text[txt] && seg < 8)
           {
-            // uint16_t value = 0;
-            char c = text[seg];
-            P057_data->ledMatrix.SetDigit(seg, c);
+            setDot = (txt < text.length() - 1 && text[txt + 1] == '.');
+            char c = text[txt];
+            P057_data->ledMatrix.SetDigit(seg, c, setDot);
             seg++;
+            txt++;
+            if (setDot) { txt++; } // extra increment to skip past the dot
           }
           P057_data->ledMatrix.TransmitRowBuffer();
           success = true;