Zephyr now supports the DHSBC STM32MP255C and the DHSBC RS-485 CAN Shield

Date : 9. November 2026

Zephyr now supports the DHSBC STM32MP255C and the DHSBC RS-485 CAN Shield

Our Single Board Computer DHSBC STM32MP255C and the DHSBC RS-485 CAN Shield now have board support in Zephyr, with documentation and ready-to-run samples.

Zephyr has been extended with support for the DHSBC STM32MP255C. Applications run on the board’s integrated Arm Cortex-M33. The support is part of the official Zephyr project, so you work with the existing samples and build tooling and don’t depend on a separate vendor tree.

Board interfaces

The board’s common communication interfaces are supported. By default, FDCAN1, UART4 and SPI8 are enabled and available on the 40-pin header. Support for SPI8 was newly added to Zephyr as part of this work.

DHSBC RS-485 CAN Shield

The shield is supported as well. The RS-485 interface sends and receives data over UART, with GPIO signals controlling the transmit and receive direction. It works with Zephyr’s Modbus sample applications, such as the Modbus RTU client and server.

CAN-FD uses the CAN controller integrated in the STM32MP255C, so the shield only needs a CAN transceiver to handle the signals on the physical bus. The interface works with existing Zephyr samples such as “CAN Babbling” and “CAN Counter”.

Open to other shields

For the 40-pin header, support for Zephyr’s GPIO nexus nodes was implemented as well. This makes it possible to connect other Raspberry Pi compatible shields, provided their interfaces and hardware configuration are supported.

From prototype to your own product

Board and shield are built for industrial use, –40 to +85 °C, with 10+ years of long-term availability. If your project needs more interfaces or grows in volume, we can develop a custom board with you on the same DHSOM basis.

Documentation

Zephyr provides detailed documentation for board and shield, including how to build and flash the samples:

DHSBC STM32MP255C: https://docs.zephyrproject.org/latest/boards/dh/stm32mp255c_dhsbc/doc/index.html
DHSBC RS-485 CAN Shield: https://docs.zephyrproject.org/latest/boards/shields/dhsbc_rs485_can_shield/doc/index.html

Products

Back to overview

Name	Purpose	Lifetime	Type	Provider
CookieConsent	Saves your consent to using cookies.	1 year	HTML	Website
fe_typo_user	Assigns your browser to a session on the server. This data influences the content you see and is not evaluated or processed by us.	session	HTTP	Website

Name	Purpose	Lifetime	Type	Provider
_ga	Is used to differentiate between users.	2 years	HTML	Google
_gat	Is used to throttle the polling rate.	1 day	HTML	Google
_gid	Is used to differentiate between users.	1 day	HTML	Google
_ga_--container-id--	Saves the current status of the session.	2 years	HTML	Google
_gac_--property-id--	Is used to evaluate campaigns created with Google Analytics.	3 months	HTML	Google
_gcl_au	Used by Google AdSense for experimenting with advertisement efficiency across websites using their services.	3 months	HTML	Google
AMP_TOKEN	Contains a token that can be used to retrieve a client ID from the AMP Client ID service. Other possible values are opt-out, inflight request, or an error retrieving a client ID from the AMP Client ID service.	1 year	HTML	Google
_dc_gtm_--property-id--	Certain data is only sent to Google Analytics a maximum of once per minute. The cookie has a lifetime of one minute. As long as it is set, certain data transfers are prevented.	2 years	HTML	Google