GitHub - HarveyBates/controllino-can: CAN interface for the Controllino-MEGA

Controllino-CAN

Small PCB that fits onto the header of a Controllino-MEGA allowing it to interface with CAN devices through SPI. Does not take up any output/input pins!

Example Code

Utilises the MCP2515 arduino library. See futher information in the examples folder.

#include <Controllino.h>
#include "mcp2515.h"

#define BIT_RATE CAN_500KBPS
#define NODE_ID 0x0A // Node-ID = 10
#define FUNCTION_CODE 0x180 // CANopen PDO1_TX

// Setup MCP2515 lib with SPI chip-select pin
MCP2515 can(CONTROLLINO_PIN_HEADER_SS);

void setup() {
  Serial.begin(115200);
  Controllino_RTC_init();
  can.reset();
  can.setBitrate(BIT_RATE, MCP_8MHZ);
  can.setNormalMode();
}

void loop() {
  can_frame frame{};
  frame.can_dlc = 8;
  frame.can_id = FUNCTION_CODE | NODE_ID;
  if (can.sendMessage(&frame) == MCP2515::ERROR_OK) {
    Serial.println("TX");
  } else {
    Serial.println("ERR");
  }
  delay(5000);
}

BOM

The bill-of-materials can be found here. The componets only cost $12 AUD ($8 USD).

PCB ordering

Compress the gerber folder and upload to your PCB manufactuer of choice (e.g. jlcpcb or PCBway etc.). As the components are SMD (0805 smallest size) get a stencil (top-side of PCB only) to make assembly easier. PCB plus stencil is roughly $15 AUD ($10 USD).

Licence

Controllino-CAN is licenced under the GNU General Public Licence v3.0 as outlined in the LICENCE.