candleLight FD is a modern, CAN-FD capable version of the candleLight based on a STM32G0B1 microcontroller.
Out of the box it comes with a single CAN channel placed. But footprints for a second CAN channel are available.
The candleLight FD is - like the candleLight - licensed under the CERN OHL v1.2 open hardware license.
The candleLight FD is available from Linux Automation as a SMD-assembled and functionally tested kit.
The candleLight FD uses a USB-C (USB 2 only) connector to connect to your PC.
CAN is provided on the industry standard D-SUB9 pinout:
- CAN1:
- High: Pin 7
- Low: Pin 2
- CAN2:
- High: Pin 8
- Low: Pin 1
- Power:
- 12V: Pin 9 (can be provided via P1)
- GND: Pin 3, Pin 6
Manufacturing Data | Schematic | Interactive BOM
(This is the current release.)
Release Notes:
- Initial release of the candleLight FD.
The firmware is based on the candleLight_fw.
Select the board config BOARD_candleLightFD when building the firmware.
NOTE: We are currently upstreaming our changes to the candleLight_fw repository. While doing so you can find our sources here.
Everyday programming can be done via USB.
Simply invoke dfu-util while the device is running.
More information on flashing can be found in the
firmware repository.
In case the device is bricked: Short the two pins labeled BOOT while powering on the device. The CPU will start in serial download mode.
For debugging a single wire interface is exposed on X3. It can be connected using a Tag Connect TC2030-IDC-NL adapter. The pinout is derived from the CandleLight.
The pinout is:
* Pin 1: 3V3
* Pin 2: SWCLK
* Pin 3: GND
* Pin 4: SWDIO
* Pin 5: NRST
* Pin 6: (not connected)
This picture shows X3 on the device. X3 is the connector in the lower left corner - below the USB-C connector.
