Merge pull request #22 from sparkfun/v2.2.10

v2.2.10

Author: sfe-SparkFro

library.properties

@@ -1,5 +1,5 @@
 name=SparkFun Qwiic Alphanumeric Display Arduino Library
-version=2.2.9
+version=2.2.10
 author=SparkFun Electronics
 maintainer=SparkFun Electronics
 sentence=A library to drive the Holtek HT16K33 LED Driver with an Alphanumeric Display.

src/SparkFun_Alphanumeric_Display.cpp

@@ -475,7 +475,8 @@ bool HT16K33::setDecimalOnOff(uint8_t displayNumber, bool turnOnDecimal, bool up
 		dat = 0x00;
 	}
 
-	displayRAM[adr + (displayNumber - 1) * 16] = displayRAM[adr + (displayNumber - 1) * 16] | dat;
+	displayRAM[adr + (displayNumber - 1) * 16] &= 0xFE;
+	displayRAM[adr + (displayNumber - 1) * 16] |= dat;
 
 	if(updateNow)
 	{
@@ -547,7 +548,8 @@ bool HT16K33::setColonOnOff(uint8_t displayNumber, bool turnOnColon, bool update
 		dat = 0x00;
 	}
 
-	displayRAM[adr + (displayNumber - 1) * 16] = displayRAM[adr + (displayNumber - 1) * 16] | dat;
+	displayRAM[adr + (displayNumber - 1) * 16] &= 0xFE;
+	displayRAM[adr + (displayNumber - 1) * 16] |= dat;
 
 	if(updateNow)
 	{
@@ -759,6 +761,10 @@ size_t HT16K33::write(uint8_t b)
  */
 size_t HT16K33::write(const uint8_t *buffer, size_t size)
 {
+	// Do not exceed number of digits available
+	if(size > 4 * numberOfDisplays)
+		size = 4 * numberOfDisplays;
+	
 	size_t n = size;
 	uint8_t buff;
 
@@ -782,7 +788,6 @@ size_t HT16K33::write(const uint8_t *buffer, size_t size)
 			displayContent[digitPosition] = buff; // Record to internal array
 
 			digitPosition++;
-			digitPosition %= (numberOfDisplays * 4);
 		}
 	}