candleLightFD

Overview

The candleLight FD is an open-hardware USB to CAN FD adapter board available from Linux Automation GmBH. Find more information about the board at the Linux Automation website.

Hardware

The candleLight FD board is equipped with a STM32G0B1CBT6 microcontroller and features an USB-C connector, a DB-9M connector for the CAN bus, and two user LEDs. Schematics and component placement drawings are available in the candleLight FD GitHub repository.

Supported Features

The candlelightfd board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

System Clock

The STM32G0B1CBT6 PLL is driven by an external crystal oscillator (HSE) running at 8 MHz and configured to provide a system clock of 60 MHz. This allows generating a FDCAN1 and FDCAN2 core clock of 80 MHz.

Programming and Debugging

The candlelightfd board supports the runners and associated west commands listed below.

	flash	debug

Build and flash applications as usual (see Building an Application and Run an Application for more details).

If flashing via USB DFU, short jumper BOOT when applying power to the candleLight FD in order to enter the built-in DFU mode.

Variants

The candleLight FD is can be retrofitted with a second transceiver, making it a dual CAN FD device:

candlelightfd: The default variant.
candlelightfd_stm32g0b1xx_dual: Variant for the dual CAN FD.

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b candlelightfd samples/basic/blinky
west flash