Fix multiple defines, add ACAN locally

Software/MCP2515ReceiveFilters.h

@@ -0,0 +1,91 @@
+//··································································································
+// MCP2515 Receive filter classes
+// by Pierre Molinaro
+// https://github.com/pierremolinaro/acan2515
+//··································································································
+
+#ifndef MCP2515_RECEIVE_FILTER_ENTITIES_DEFINED
+#define MCP2515_RECEIVE_FILTER_ENTITIES_DEFINED
+
+//··································································································
+
+#include <Arduino.h>
+
+//··································································································
+
+class ACAN2515Mask {
+
+//--- Default constructor
+  public: ACAN2515Mask (void) :
+  mSIDH (0),
+  mSIDL (0),
+  mEID8 (0),
+  mEID0 (0) {
+  }
+
+//--- Properties
+  public: uint8_t mSIDH ;
+  public: uint8_t mSIDL ;
+  public: uint8_t mEID8 ;
+  public: uint8_t mEID0 ;
+} ;
+
+//··································································································
+
+class ACAN2515AcceptanceFilter {
+  public: typedef void (*tCallBackRoutine) (const CANMessage & inMessage) ;
+  public: const ACAN2515Mask mMask ;
+  public: const tCallBackRoutine mCallBack ;
+} ;
+
+//··································································································
+
+inline ACAN2515Mask standard2515Mask (const uint16_t inIdentifier,
+                                      const uint8_t inByte0,
+                                      const uint8_t inByte1) {
+  ACAN2515Mask result ;
+  result.mSIDH = (uint8_t) (inIdentifier >> 3) ;
+  result.mSIDL = (uint8_t) (inIdentifier << 5) ;
+  result.mEID8 = inByte0 ;
+  result.mEID0 = inByte1 ;
+  return result ;
+}
+
+//··································································································
+
+inline ACAN2515Mask extended2515Mask (const uint32_t inIdentifier) {
+  ACAN2515Mask result ;
+  result.mSIDH = (uint8_t) (inIdentifier >> 21) ;
+  result.mSIDL = (uint8_t) (((inIdentifier >> 16) & 0x03) | ((inIdentifier >> 13) & 0xE0)) ;
+  result.mEID8 = (uint8_t) (inIdentifier >> 8) ;
+  result.mEID0 = (uint8_t) inIdentifier ;
+  return result ;
+}
+
+//··································································································
+
+inline ACAN2515Mask standard2515Filter (const uint16_t inIdentifier,
+                                 const uint8_t inByte0,
+                                 const uint8_t inByte1) {
+  ACAN2515Mask result ;
+  result.mSIDH = (uint8_t) (inIdentifier >> 3) ;
+  result.mSIDL = (uint8_t) (inIdentifier << 5) ;
+  result.mEID8 = inByte0 ;
+  result.mEID0 = inByte1 ;
+  return result ;
+}
+
+//··································································································
+
+inline ACAN2515Mask extended2515Filter (const uint32_t inIdentifier) {
+  ACAN2515Mask result ;
+  result.mSIDH = (uint8_t) (inIdentifier >> 21) ;
+  result.mSIDL = (uint8_t) (((inIdentifier >> 16) & 0x03) | ((inIdentifier >> 13) & 0xE0)) | 0x08 ;
+  result.mEID8 = (uint8_t) (inIdentifier >> 8) ;
+  result.mEID0 = (uint8_t) inIdentifier ;
+  return result ;
+}
+
+//··································································································
+
+#endif