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/stm32g0b1xx board target supports the following hardware features:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
PINMUX	on-chip	pinmux
FLASH	on-chip	flash memory
GPIO	on-chip	gpio
USB	on-chip	USB
CAN1	on-chip	CAN controller
CAN2	on-chip	CAN controller

The default configuration can be found in the defconfig file: boards/others/candlelightfd/candlelightfd_stm32g0b1xx_defconfig.

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

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