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.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M0 CPU1 |
|
ADC |
on-chip |
STM32 ADC1 |
|
CAN |
on-chip |
STM32 CAN controller1 |
|
Clock control |
on-chip |
STM32F0/G0 RCC (Reset and Clock controller)1 |
|
on-chip |
STM32 HSE Clock1 |
||
on-chip |
|||
on-chip |
STM32 LSE Clock1 |
||
on-chip |
STM32F0/F3 Main PLL1 |
||
Counter |
on-chip |
STM32 counters5 |
|
DAC |
on-chip |
STM32 family DAC1 |
|
DMA |
on-chip |
STM32 DMA controller (V2bis) for the stm32F0, stm32F1 and stm32L1 soc families1 |
|
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
GPIO & Headers |
on-chip |
STM32 GPIO Controller6 |
|
I2C |
on-chip |
STM32 I2C V2 controller2 |
|
Interrupt controller |
on-chip |
ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Memory controller |
on-chip |
STM32 Battery Backed RAM1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
PHY |
on-chip |
This binding is to be used by all the usb transceivers which are built-in with USB IP1 |
|
on-board |
Simple GPIO controlled CAN transceiver1 |
||
Pin control |
on-chip |
STM32 Pin controller1 |
|
PWM |
on-chip |
STM32 PWM7 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
Sensors |
on-chip |
STM32 VREF+1 |
|
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
||
on-chip |
STM32 VBAT1 |
||
Serial controller |
on-chip |
STM32 USART4 |
|
SMbus |
on-chip |
STM32 SMBus controller2 |
|
SPI |
on-chip |
STM32 SPI controller with embedded Rx and Tx FIFOs2 |
|
SRAM |
on-chip |
Generic on-chip SRAM description1 |
|
Timer |
on-chip |
ARMv6-M System Tick1 |
|
on-chip |
STM32 timers9 |
||
USB |
on-chip |
STM32 USB controller1 |
|
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
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
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