# 280 SDK CAN Communications' Stack

The 280 ST/QT-SDK includes a CAN communication stack with support for two high-level protocols:

1. **SAE J1939** – Commonly used in automotive and heavy-duty vehicle applications.
1. **CANopen (CiA 301)** – Widely used in industrial automation and control systems.

Both protocol stacks are available in both SDK variants: **280 ST-SDK** and **280 QT-SDK**.

## Default and Custom Configurations

The SDK provides basic out-of-the-box configurations for both J1939 and CANopen.
For customized configurations, such as:

1. Proprietary or extended J1939 message sets
1. Custom CANopen object dictionaries

Please contact your *maximatecc sales support representative* to obtain a tailored CAN communication library. This library will include:

1. The required protocol stack configuration
1. Data Layer mapping for seamless integration with the SDK

![SDK Platform Services](/content/images/SDK_CAN_comm.png)

## Integration and Data Access

Once the customized library is integrated into the SDK:

1. All configured signals become available through the Data Layer.
1. The Data Layer abstracts protocol details, making signals accessible to the rest of the system.

## Applying CAN Protocol Updates

To apply changes:

1. Rebuild the SDK project using STM32CubeIDE.
1. Reprogram the target unit with the updated firmware.