1.Overview

The GCAN-601 is a communication converter that integrates with one CAN-Bus interface, one UART interface. The GCAN-601 can be directly connected to the UART interface of MCU, which can make a CAN-Bus communication without changing its original hardware.

In normal operation, the GCAN-601 module is in a state of real-time monitoring of the CAN bus and the UART bus. Once a data is received on one bus, it is immediately parsed and loaded into its own buffer. According to the set working mode, the data on the bus is sent to the other bus to realize the conversion of the data format.

2.Properties at a glance

Standard UART level, can be directly connected with MCU

Support serial baud rate 600bps~921600bps

Supply three kinds of conversion modes: transparent conversion, transparent conversion with identity, format conversion

Configure three kinds of conversion directions: bidirectional conversion, CAN→ serial interface, serial interface→ CAN

CAN-Bus support CAN2.0A and CAN2.0B frame format, conform to ISO/DIS11898 specification

Support CAN-Bus communication baud rate: 5Kbps~1Mbps

Use 3.3V DC power supply

Save configured parameters in storage, call the latest parameters automatically after supplying power

Working temperature: -40.00℃~ + 85.00℃

Dimensions: 22mm(L) ×13mm(W) 

3. Introduction

Pin	Name	Definition
1	3.3V	Power +3.3V interface
2	UART_TX	UART TX pin
3	UART_RX	UART RX pin
4	CAN_H	Connect CAN_H
5	CAN_L	Connect CAN_L
6	GND	GND interface
7	IAP	Update kernel
8	RST	Reset pin
9/10	NC	No connection

 

3.2 Seal and package

 

 

4. Application sample

4.1 Transparent conversion

4.1.1 Frame format
Serial frame: data flow or data with protocol, communication format: 1 start, 8 data, 1 stop
CAN-Bus frame: keep the CAN message format
4.1.2 Conversion mode
1. Serial frame convert CAN message
All of serial frame data convert into data area of CAN message. Frame ID is configured by user, as shown figure 4.1.

2. CAN message convert serial frame
Check “Permit frame information transmits to serial frame” and “Permit frame ID transmits to serial frame”, as shown figure 4.2.

Figure 4.2 CAN message convert serial frame (transparent conversion)

4.2 Transparent conversion with identity

Details see the "3.3.2 Transparent conversion with identity".
4.2.1 Frame format
1. Serial frame
Details see the "3.3.2 Transparent conversion with identity".

Figure 4.3 time format of serial frame (transparent conversion with identity)
2. CAN-Bus frame
Keep CAN message format, just convert corresponding to frame ID of CAN into the serial frame.
4.2.2 Conversion mode
1. Serial frame convert CAN message
The initial position ranges from 1~7, length ranges from 1~2 (standard frame) or 1~4 (extend frame).
Suggested values:
For standard frame: initial position 1, standard frame 2.
For extend frame: initial position 1, extend frame 4.
For example of standard frame:

Figure 4.4 serial frame convert CAN message (transparent conversion with identity)
2. CAN message convert serial frame
For example of standard frame:

Figure4.5 CAN message convert serial frame (transparent conversion with identity)

4.3 Format conversion

The GCAN-601 module has data conversion format, as shown the picture.
Every CAN frame contains 13 bytes, and 13 bytes contains CAN frame + frame ID + frame data.

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