candleLight

Overview

The candleLight is an open-hardware USB to CAN 2.0B adapter board available from a number of sources.

Hardware

The candleLight board is equipped with a STM32F072CB microcontroller and features an USB connector, a DB-9M connector for the CAN bus, and two user LEDs. Schematics and component placement drawings are available in the candleLight GitHub repository.

Supported Features

The candlelight 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 STM32F072CB PLL is driven by the internal RC oscillator (HSI) running at 8 MHz and configured to provide a system clock of 48 MHz.

Programming and Debugging

The candlelight 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 resistor R203 when applying power to the candleLight in order to enter the built-in DFU mode.

Here is an example for the Blinky application.

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