Olimex Unveils STM32MP1-Based Open Hardware STMP1-OLinuXino Single-Board Computer

Offering Arm Cortex-A and Cortex-M4 processors, the new board shares its layout with the earlier LIME2.

Open hardware specialist Olimex has unveiled a new single-board computer design, the STMP1-OLinuXino, based on the ST Microelectronics ST32MP1 family and boasting mainline Linux support — as well as an impressively wide operating temperature range.

"ST32MP1XX SoCs from ST Microelectronics has one unique feature: They operate from -40 up to +125 [degrees Celsius] by default," the company explains of its decision to build a board around the parts. "There is no other commercial or industrial or etc temperature range. What does this mean – very well done production! It’s not secret that all SoC vendors produce their chips then test them and which pass -40+125 are classified automotive grade, which fail but pass -40+85C are classified industrial and it there are SoC which fail both automotive and industrial grade on tests are sold as commercial grade. This chip has no other than automotive grade, so ST is confident in their process quality."

The parts themselves feature an Arm Cortex-M4 co-processor for real-time tasks alongside its Cortex A-series application-class processors, two full-duplex CAN buses, two analogue-to-digital converters (ADCs) with 16-bit maximum resolution, two 12-bit digital-to-analogue converters (DACs), a camera interface operating at up to 140MB/s, gigabit Ethernet, six SPI, six I2C FM+, and both Arm TrustZone and secure boot support. All this, naturally, is brought out into the finished board design.

"We designed our STMP1-OLinuXino to be with same layout as A20-OLinuXino-LIME2, with all connectors on same positions, so people who used LIME2 to may migrate to STMP1 if necessary," the company continues. "We put the SoC on bottom this time to may attach easier bigger heat sinks or even connect it to the BOX-LIME-BLACK metal and remove the need for aluminium heatsink."

More information is available on the Olimex blog, while preliminary design files can be found on the company's GitHub repository. The board layout isn't yet finished, however: "We just placed the components on their approximate locations," Olimex notes, with schematic verification and board routing still to take place.

Gareth Halfacree
Freelance journalist, technical author, hacker, tinkerer, erstwhile sysadmin. For hire: freelance@halfacree.co.uk.
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