STM32F3 Discovery

Overview

The STM32F3DISCOVERY Discovery kit features an ARM Cortex-M4 based STM32F303VC MCU with everything required for beginners and experienced users to get started quickly. Here are some highlights of the STM32F3DISCOVERY board:

STM32 microcontroller in LQFP100 package
Extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing
On-board, ST-LINK/V2 for PCB version A or B or ST-LINK/V2-B for PCB version C and newer, debugger/programmer with SWD connector
Board power supply: through USB bus or from an external 3 V or 5 V supply voltage
External application power supply: 3 V and 5 V
Ten LEDs:
- 3.3 V power on (LD1)
- USB communication (LD2)
- Eight user LEDs: red (LD3/LD10), blue (LD4/LD9), orange (LD5/LD9) and green (LD6/LD7)
Two push-buttons: USER and RESET
USB USER with Mini-B connector
L3GD20 or I3G4250D, ST MEMS motion sensor, 3-axis digital output gyroscope
LSM303DLHC or LSM303AGR, ST MEMS system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor;

Hint

Recent PCB revisions (E and newer) are shipped with I3G4250D and LSM303AGR.

More information about the board can be found at the STM32F3DISCOVERY website.

Hardware

STM32F3DISCOVERY Discovery kit provides the following hardware components:

STM32F303VCT6 in LQFP100 package
ARM® 32-bit Cortex® -M4 CPU with FPU
72 MHz max CPU frequency
VDD from 2.0 V to 3.6 V
256 KB Flash
40 KB SRAM
Routine booster: 8 Kbytes of SRAM on instruction and data bus
GPIO with external interrupt capability
4x12-bit ADC with 39 channels
2x12-bit D/A converters
RTC
General Purpose Timers (13)
USART/UART (5)
I2C (2)
SPI (3)
CAN
USB 2.0 full speed interface
Infrared transmitter
DMA Controller

More information about STM32F303VC can be found here:

Supported Features

The Zephyr stm32f3_disco board configuration supports the following hardware features:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
UART	on-chip	serial port-polling; serial port-interrupt
PINMUX	on-chip	pinmux
GPIO	on-chip	gpio
I2C	on-chip	i2c
SPI	on-chip	spi
USB	on-chip	USB device
CAN	on-chip	CAN
IWDG	on-chip	Independent WatchDoG
PWM	on-chip	pwm
ADC	on-chip	adc
DAC	on-chip	dac
DMA	on-chip	Direct Memory Access
die-temp	on-chip	die temperature sensor
RTC	on-chip	rtc

Other hardware features are not yet supported on Zephyr porting.

The default configuration can be found in boards/st/stm32f3_disco/stm32f3_disco_defconfig

Pin Mapping

STM32F3DISCOVERY Discovery kit has 6 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32F3DISCOVERY board User Manual.

Default Zephyr Peripheral Mapping:

UART_1_TX : PC4
UART_1_RX : PC5
UART_2_TX : PA2
UART_2_RX : PA3
UART_4_TX : PC10
UART_4_RX : PC11
I2C1_SCL : PB6
I2C1_SDA : PB7
I2C2_SCL : PA9
I2C2_SDA : PA10
SPI1_NSS : PA4
SPI1_SCK : PA5
SPI1_MISO : PA6
SPI1_MOSI : PA7
SPI2_NSS : PB12
SPI2_SCK : PB13
SPI2_MISO : PB14
SPI2_MOSI : PB15
CAN1_RX : PD0
CAN1_TX : PD1
USB_DM : PA11
USB_DP : PA12
USER_PB : PA0
LD3 : PE9
LD4 : PE8
LD5 : PE10
LD6 : PE15
LD7 : PE11
LD8 : PE14
LD9 : PE12
LD10 : PE13
PWM : PA8
ADC1 : PA0
DAC1 : PA4

System Clock

STM32F3DISCOVERY System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 72 MHz, driven by 8 MHz MCO from the ST Link.

Serial Port

STM32F3DISCOVERY Discovery kit has up to 5 UARTs. The Zephyr console output is assigned to UART1. Default settings are 115200 8N1.

I2C

STM32F3DISCOVERY has up to 2 I2Cs. I2C1 is connected to the LSM303DLHC and is an ultra-compact low-power system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor.

USB

STM32F3DISCOVERY has a USB 2.0 full-speed device interface available through its mini USB connector (USB USER).

CAN

The STM32F3DISCOVERY does not have an onboard CAN transceiver. In order to use the CAN bus on the this board, an external CAN bus transceiver must be connected to PD0 (CAN1_RX) and PD1 (CAN1_TX).

Programming and Debugging

STM32F3DISCOVERY Discovery kit includes a ST-LINK/V2 or ST-LINK/V2-B embedded debug tool interface.

Applications for the stm32f3_disco board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.

Alternatively, OpenOCD or JLink can also be used to flash the board using the --runner (or -r) option:

$ west flash --runner openocd
$ west flash --runner jlink

Flashing an application to STM32F3DISCOVERY

First, connect the STM32F3DISCOVERY Discovery kit to your host computer using the USB port to prepare it for flashing. Then build and flash your application.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b stm32f3_disco samples/hello_world
west flash

In case you are using a recent PCB revision (E or newer), you have to use an adapted board definition:

# From the root of the zephyr repository
west build -b stm32f3_disco@E samples/hello_world
west flash

Run a serial host program to connect with your board. For PCB version A or B a TTL(3.3V) serial adapter is required. For PCB version C and newer a Virtual Com Port (VCP) is available on the USB ST-LINK port.

$ minicom -D /dev/<tty device>

Replace <tty_device> with the port where the STM32F3DISCOVERY board can be found. For example, under Linux, /dev/ttyUSB0.

You should see the following message on the console:

Hello World! arm

Debugging

You can debug an application in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b stm32f3_disco samples/hello_world
west debug

Again you have to use the adapted command for newer PCB revisions (E and newer):

# From the root of the zephyr repository
west build -b stm32f3_disco@E samples/hello_world
west debug