avr: Conserve memory with smallest data types

Signed-off-by: Ricky Cheung <[email protected]>

Author: Ricky Cheung

Arduino_Code/Arduino_Code.ino

@@ -34,7 +34,7 @@ for default settings use -O0. -O may be a good tradeoff between both */
 /* For 8-bit microcontrollers we should use 16 bit variables since the
 difficulty is low, for all the other cases should be 32 bits. */
 #if defined(ARDUINO_ARCH_AVR) || defined(ARDUINO_ARCH_MEGAAVR)
-typedef uint32_t uintDiff;
+typedef uint16_t uintDiff;
 #else
 typedef uint32_t uintDiff;
 #endif
@@ -48,7 +48,7 @@ typedef uint32_t uintDiff;
 
 bool digitDrawn = false;
 bool matrixEnabled = true;
-int minedDigitCount = 0;
+byte minedDigitCount = 0;
 
 Adafruit_Microbit_Matrix microbit;
 #endif