First of all, thank you for you answer.
Of course, I connected power pin, just forget to mention it.
After I wrote all these posts I found that CAN shield is not compatible with Leonardo, so I took my UNO and tried a slightly modified example from your github library:
[code]// demo: CAN-BUS Shield, receive data
#include <mcp_can.h>
#include <SPI.h>
long unsigned int rxId;
unsigned char len = 0;
unsigned char rxBuf[8];
MCP_CAN CAN0(10); // Set CS to pin 10
void setup()
{
delay(5000);
Serial.begin(115200);
if(CAN0.begin(CAN_100KBPS) == CAN_OK) Serial.print(“can init ok!!\r\n”);
else Serial.print(“Can init fail!!\r\n”); // init can bus : baudrate = 100k
pinMode(2, INPUT); // Setting pin 2 for /INT input
Serial.println(“MCP2515 Library Receive Example…”);
}
void loop()
{
if(!digitalRead(2)) // If pin 2 is low, read receive buffer
{
CAN0.readMsgBuf(&len, rxBuf); // Read data: len = data length, buf = data byte(s)
rxId = CAN0.getCanId(); // Get message ID
Serial.print("ID: “);
Serial.print(rxId, HEX);
Serial.print(” Data: “);
for(int i = 0; i<len; i++) // Print each byte of the data
{
if(rxBuf[i] < 0x10) // If data byte is less than 0x10, add a leading zero
{
Serial.print(“0”);
}
Serial.print(rxBuf[i], HEX);
Serial.print(” ");
}
Serial.println();
}
}
/*********************************************************************************************************
END FILE
*********************************************************************************************************/[/code]
That gives me this output:
can init ok!!
MCP2515 Library Receive Example...
So, as I see, the library itself works, but after that there’s complete silence. No RX blinking, no messages received. I have CAN wires connected to my car’s wires, and it is know to work because CAN adapter for my clarion stereo works fine.
What else could I check to receive something?