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CANBed - Arduino CAN-Bus ATmega32U4 devboard

SEEED 102991321

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Seeed Studio 102991321 - Longan CANBed - Arduino CAN-BUS Development Kit (ATmega32U4 with MCP2515 and MCP2551)

Description

CANBed - Arduino CAN-BUS Development Kit embeds an ATmega32U4 chip, which means you don’t need to add other jump wires to another Arduino Board, it is an Arduino board itself plus MCP2515 CAN Bus controller and MCP2551 CAN Bus transceiver! 

Features

  • Enhanced MCU Performance: ATmega32U4 with Arduino Leonardo bootloader on the board
  • Compatible with Arduino: Combines CAN-BUS shield and Arduino development board together on a single board
  • High Speed: Implements CAN V2.0B at up to 1 Mb/s
  • Rich Resources in Pins: 18 pins that include digital pins, analog pins, UART, and I2C interface
  • Easy to Use: Requires no other MCU to control and is compatible with Arduino IDE

CAN-BUS is a common protocol and widely used in industry due to its long travel distance, medium communication speed, and high reliability. Now you can realize a CAN-BUS project through this tiny little development board.

Because of the ATmega32U4 onboard chip, this board has rich resources in pins. As a matter of fact, there are 18 pins based on the core chipset up on the board, which include digital pins, analog pins, UART, and an I2C interface. Besides, this CANBed adopts the MCP2515 CAN Bus controller with SPI interface and MCP2551 to achieve the CAN-Bus capability. There are also two kinds of CAN Bus interfaces for various demands which are sub-D9 connector and terminal block interface. They would fit all your needs in the connecting method.

This CAN-Bus development board is perfectly compatible with Arduino IDE. With the help of the Arduino CAN-Bus library, you will save plenty of time for your CAN project. 

What is CAN-BUS?

CAN stands for Controller Area Network, it is used toallow microcontrollers and devices to communicate with each other within a vehicle without a host computer which allows for control and data acquisition. These devices are also called Electronic Control Units (ECU) and they enable communication between all parts of a vehicle.

Today, you can find up to 70 ECUs in a modern car. CAN is a serial communication bus designed for industrial and automotive applications. For example, they are found in vehicles, farming equipment, industrial environments, etc.

How does CAN-BUS work?

The fuel level, door sensors, odometer, and many more parts of a car have to communicate with each other somehow, and CAN BUS is what they used to do. These CAN-compatible components, which are called “nodes” are connected with a 3-string copper wire, with no central router to govern the flow of data. Every node can hear the messages of every other node.

Every node has an ID, where the ones with the higher priority ID can have the priority to “talk” first while the others “listen”. This is to ensure that there are never two nodes talking at the same time. The biggest benefit of CAN-BUS is to be able to just connect components without having to worry about signal routing.

Learn more about CAN-BUS here.

Application

  • Car hacking: The user can connect the circuit board to the OBD interface through the sub-D connector to read the data of the car
  • Easy building prototype: ATmega32U4 chip leads out various additional functions which help especially beginners build various prototypes.

Specification

ParameterValue
MCUATmega32U4(with Arduino Leonardo bootloader)
Clock Speed16MHz
Flash Memory32KB
SRAM2.5KB
EEPROM1KB
Operate Voltage(CAN-BUS)9-28V
Operate Voltage (MicroUSB)5V
Input Interfacesub-D

Hardware Overview

D-Sub CANbus PinOut

pin#Signal namesSignal Description
1ReservedUpgrade Path
2CAN_LDominant Low
3CAN_GNDGround
4ReservedUpgrade Path
5CAN_SHLDShield, Optional
6GNDGround, Optional
7CAN_HDominant High
8ReservedUpgrade Path
9CAN_V+Power, Optional

Switch for the 120Ω terminal resistor for CAN Bus

If you use this slaver at the end of the CAN bus, you need to solder a 120Ω resister between the two pads, if not just leave them alone.

Part List

CANBed PCBA 

1
sub-D connector 1
4PIN Terminal1
4PIN 2.0 Connector2
9x2 2.54 Header1
3x2 2.54 Header1

Links

Klikkaa tarkemmat tiedot
ValmistajaSeeed Studio
Valmistajan malli1030008
Toimittajan koodi102991321
ProsessoriAVR (ATMEGA32U4)

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