ST 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:

• STM32F303VC on www.st.com

• STM32F303xC reference manual

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

Flashing

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 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