tuna-f1sh / stm32f0-slcan

slcan compatiable firmware for STM32F0 communicating on USART2

STM32 SLCAN

Port of stm32-slcan to STM32F0 (Cortex M0). An alternative to candleLight firmware on Cantact compatiable schematic to use USART rather than USB.

Build

git submodule init
git submodule update
cd libopencm3/ && make && cd ../
make

Flashing SWD

Using SWD interface with st-flash or gdb

# SWDIO PA13, SWDCLK PA14 and NRST to Black Magic Probe
make flash

CAN-Interface

/* CAN1 / CAN GPIO */
#define GPIO_CAN_PB_RX                  GPIO8           /* PB8 */
#define GPIO_CAN_PB_TX                  GPIO9           /* PB9 */

Usage

/* USART2 GPIO */
#define GPIO_USART2_CTS                 GPIO0           /* PA0 */
#define GPIO_USART2_RTS                 GPIO1           /* PA1 */
#define GPIO_USART2_TX                  GPIO2           /* PA2 */
#define GPIO_USART2_RX                  GPIO3           /* PA3 */

and do:

sudo modprobe can
sudo modprobe can-raw
sudo modprobe slcan
sudo slcand -s5 -S500000 /dev/ttyUSB0 can0 # CAN Speed 5 ->250 kBaud - 500,000 Baud serial (fix)
ifconfig can0 up

Now you can use it as SocketCAN interface - enjoy :-)

Links

See 'ref/' folder for useful material.

• Original STM32F1 Schematic.
• opencm3 lib CAN example with STM32F0 and blog post.
• CAN Bit Time Calculator.