Get the "calloc" function to work across different processors.

Author: makin-stuff

src/SparkFun_Alphanumeric_Display.cpp

@@ -679,7 +679,7 @@ bool HT16K33::defineChar(uint8_t displayChar, uint16_t segmentsToTurnOn)
 	  uint16_t characterPosition = displayChar - '!' + 1;
 
       //Create a new character definition
-      struct CharDef * pNewCharDef = calloc(1, sizeof(CharDef));
+      struct CharDef * pNewCharDef = (CharDef *)calloc(1, sizeof(CharDef));
 
 	  //Set the position to the table index
       pNewCharDef -> position = characterPosition;

src/SparkFun_Alphanumeric_Display.h

@@ -26,6 +26,8 @@ Distributed as-is; no warranty is given.
 
 #include <Arduino.h>
 #include <Wire.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 #define DEFAULT_ADDRESS 0x70 //Default I2C address when A0, A1 are floating
 // #define DEV_ID 0x12          //Device ID that I just made up