Receiver code for Interfacing MCP2515 CAN Module with Arduino.

Arduino_MCP_2515_CAN_Tutorial_Recv.ino

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

const int spiCSPin = 10;
const int ledPin = 2;
boolean ledON = 1;

MCP_CAN CAN(spiCSPin);

void setup()
{
    Serial.begin(115200);
    pinMode(ledPin,OUTPUT);

    while (CAN_OK != CAN.begin(CAN_500KBPS))
    {
        Serial.println("CAN BUS Init Failed");
        delay(100);
    }
    Serial.println("CAN BUS  Init OK!");
}


void loop()
{
    unsigned char len = 0;
    unsigned char buf[8];

    if(CAN_MSGAVAIL == CAN.checkReceive())
    {
        CAN.readMsgBuf(&len, buf);

        unsigned long canId = CAN.getCanId();

        Serial.println("-----------------------------");
        Serial.print("Data from ID: 0x");
        Serial.println(canId, HEX);

        for(int i = 0; i<len; i++)
        {
            Serial.print(buf[i]);
            Serial.print("\t");
            if(ledON && i==0)
            {

                digitalWrite(ledPin, buf[i]);
                ledON = 0;
                delay(500);
            }
            else if((!(ledON)) && i==4)
            {

                digitalWrite(ledPin, buf[i]);
                ledON = 1;
            }
        }
        Serial.println();
    }
}