Allow to change clock for MCP2515 in order to support mcp2515+TJA1080 shields and modules

Author: Anton N

CanHacker.cpp

@@ -54,8 +54,12 @@ Stream *CanHacker::getInterfaceStream() {
     return _stream;
 }
 
+void CanHacker::setClock(uint8_t clock){
+    canClock = clock;
+}
+
 CanHacker::ERROR CanHacker::connectCan() {
-    MCP2515::ERROR error = mcp2515->setBitrate(bitrate);
+    MCP2515::ERROR error = mcp2515->setBitrate(bitrate, canClock);
     if (error != MCP2515::ERROR_OK) {
         writeDebugStream(F("setBitrate error:\n"));
         writeDebugStream((int)error);

CanHacker.h

@@ -47,6 +47,7 @@ class CanHacker {
 
         CanHacker(Stream *stream, Stream *debugStream, uint8_t cs);
         ~CanHacker();
+        void setClock(const uint8_t clock);
         ERROR receiveCommand(const char *buffer, const int length);
         ERROR receiveCanFrame(const struct can_frame *frame);
         ERROR sendFrame(const struct can_frame *);
@@ -64,6 +65,7 @@ class CanHacker {
         static const char BEL = 7;
         static const uint16_t TIMESTAMP_LIMIT = 0xEA60;
 
+        uint8_t canClock = MCP_16MHZ;
         bool _timestampEnabled = false;
         bool _listenOnly = false;
         bool _loopback = false;