Add Example CAN Read

examples/CAN_read/CAN_read.ino

@@ -0,0 +1,35 @@
+#include <SPI.h>
+#include <mcp_can.h>
+
+struct can_frame canMsg;
+MCP_CAN mcp2551(10, MCP_CAN::MODE_NORMAL);
+
+
+void setup() {
+  Serial.begin(115200);
+  mcp2551.begin(CAN_125KBPS);
+  Serial.println("------- CAN Read ----------");
+  Serial.println("ID  DLC   DATA");
+  
+}
+
+void loop() {
+  
+  if (mcp2551.readMessage(&canMsg) == MCP_CAN::ERROR_OK) {
+        
+    Serial.print(canMsg.can_id); // print ID
+
+    Serial.print(canMsg.can_dlc); // print DLC
+
+    for(int i = 0; i<canMsg.can_dlc; i++)  {  // print the data
+        
+        Serial.print(canMsg.data[i]);
+        Serial.print(" ");
+
+    }
+
+
+    Serial.println();      
+  }
+
+}