Allow users to set the bit delay via constructor

TM1637Display.cpp

@@ -58,11 +58,12 @@ const uint8_t digitToSegment[] = {
 
 static const uint8_t minusSegments = 0b01000000;
 
-TM1637Display::TM1637Display(uint8_t pinClk, uint8_t pinDIO)
+TM1637Display::TM1637Display(uint8_t pinClk, uint8_t pinDIO, unsigned int bitDelay)
 {
 	// Copy the pin numbers
 	m_pinClk = pinClk;
 	m_pinDIO = pinDIO;
+	m_bitDelay = bitDelay;
 
 	// Set the pin direction and default value.
 	// Both pins are set as inputs, allowing the pull-up resistors to pull them up
@@ -177,7 +178,7 @@ void TM1637Display::showNumberBaseEx(int8_t base, uint16_t num, uint8_t dots, bo
 
 void TM1637Display::bitDelay()
 {
-	delayMicroseconds(100);
+	delayMicroseconds(m_bitDelay);
 }
 
 void TM1637Display::start()

TM1637Display.h

@@ -27,6 +27,8 @@
 #define SEG_F   0b00100000
 #define SEG_G   0b01000000
 
+#define DEFAULT_BIT_DELAY  100
+
 class TM1637Display {
 
 public:
@@ -35,7 +37,9 @@ class TM1637Display {
   //!
   //! @param pinClk - The number of the digital pin connected to the clock pin of the module
   //! @param pinDIO - The number of the digital pin connected to the DIO pin of the module
-  TM1637Display(uint8_t pinClk, uint8_t pinDIO);
+  //! @param bitDelay - The delay, in microseconds, between bit transition on the serial
+  //!                   bus connected to the display
+  TM1637Display(uint8_t pinClk, uint8_t pinDIO, unsigned int bitDelay = DEFAULT_BIT_DELAY);
 
   //! Sets the brightness of the display.
   //!
@@ -155,6 +159,7 @@ class TM1637Display {
 	uint8_t m_pinClk;
 	uint8_t m_pinDIO;
 	uint8_t m_brightness;
+	unsigned int m_bitDelay;
 };
 
 #endif // __TM1637DISPLAY__