Notes

// demo: CAN-BUS Shield, send data
// [email protected]

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

// the cs pin of the version after v1.1 is default to D9
// v0.9b and v1.0 is default D10
const int SPI_CS_PIN = 9;

MCP_CAN CAN(SPI_CS_PIN); // Set CS pin

void setup()
{
Serial.begin(115200);

while (CAN_OK != CAN.begin(CAN_500KBPS)) // init can bus : baudrate = 500k
{
Serial.println("CAN BUS Shield init fail");
Serial.println(" Init CAN BUS Shield again");
delay(100);
}
Serial.println("CAN BUS Shield init ok!");
}

unsigned char stmp[8] = {0, 0, 0, 0, 0, 0, 0, 0};
void loop()
{
// send data: id = 0x00, standrad frame, data len = 8, stmp: data buf
stmp[7] = stmp[7]+1;
if(stmp[7] == 100)
{
stmp[7] = 0;
stmp[6] = stmp[6] + 1;

if(stmp[6] == 100)
{
stmp[6] = 0;
stmp[5] = stmp[6] + 1;
}
}

CAN.sendMsgBuf(0x00, 0, 8, stmp);
delay(100); // send data per 100ms
}

// END FILE



// demo: CAN-BUS Shield, receive data with check mode
// send data coming to fast, such as less than 10ms, you can use this way
// loovee, 2014-6-13


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


// the cs pin of the version after v1.1 is default to D9
// v0.9b and v1.0 is default D10
const int SPI_CS_PIN = 9;

MCP_CAN CAN(SPI_CS_PIN); // Set CS pin

void setup()
{
Serial.begin(115200);

while (CAN_OK != CAN.begin(CAN_500KBPS)) // init can bus : baudrate = 500k
{
Serial.println("CAN BUS Shield init fail");
Serial.println(" Init CAN BUS Shield again");
delay(100);
}
Serial.println("CAN BUS Shield init ok!");
}


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

if(CAN_MSGAVAIL == CAN.checkReceive()) // check if data coming
{
CAN.readMsgBuf(&len, buf); // read data, len: data length, buf: data buf

unsigned long canId = CAN.getCanId();

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

for(int i = 0; i<len; i++) // print the data
{
Serial.print(buf[i], HEX);
Serial.print("t");
}
Serial.println();
}
}

/*********************************************************************************************************
END FILE
*********************************************************************************************************/