 
 void setup() {
     SERIAL.begin(115200);
-
-    while (CAN_OK != CAN.begin(CAN_500KBPS)) {            // init can bus : baudrate = 500k
+    while(!Serial){};
+    
+#ifdef CAN_2518FD
+    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
+#else
+    while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
+#endif          
         SERIAL.println("CAN BUS Shield init fail");
         SERIAL.println(" Init CAN BUS Shield again");
         delay(100);

// loovee, 2014-7-8

#include <SPI.h>
#include "mcp_can.h"

/*SAMD core*/
#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE

    #define SERIAL Serial
#endif

//#define CAN_2518FD
#define CAN_2515
// the cs pin of the version after v1.1 is default to D9
// v0.9b and v1.0 is default D10

#ifdef CAN_2518FD
#include "mcp2518fd_can.h"
const int SPI_CS_PIN = BCM8;
mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
#endif

#ifdef CAN_2515
#include "mcp2515_can.h"
const int SPI_CS_PIN = 9;
mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
#endif                              

const byte interruptPin = 2;
unsigned char flagRecv = 0;
unsigned char len = 0;
unsigned char buf[8];
