STM32F103 Mini

Overview

The STM32F103_MINI board features an ARM Cortex-M3 based STM32F103RC MCU with a wide range of connectivity support and configurations. There are multiple version of this board like stm32f103_mini.

STM32F103 Mini Yellow STM32F103 Mini Blue

Hardware

STM32F103 Mini provides the following hardware components:

  • STM32 microcontroller in QFP64 package

  • Flexible board power supply:

    • USB VBUS or external source (3.3V, 5V, 7 - 12V)

    • Power management access point

  • Two LEDs:

    • User LED (LD1), power LED (LD2)

  • USB re-enumeration capability:

    • Mass storage

More information about STM32F103RC can be found here:

Supported Features

The stm32f103_mini 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.

Connections and IOs

Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as input (with or without pull-up or pull-down), or as peripheral alternate function. Most of the GPIO pins are shared with digital or analog alternate functions. All GPIOs are high current capable except for analog inputs.

Board connectors:

Nucleo F103RB connectors

Default Zephyr Peripheral Mapping:

  • UART_1 TX/RX: PA9/PA10

  • UART_2 TX/RX: PA2/PA3 (ST-Link Virtual COM Port)

  • SPI1 NSS/SCK/MISO/MOSI: PA4/PA5/PA6/PA7

  • SPI2 NSS/SCK/MISO/MOSI: PB12/PB13/PB14/PB15

  • I2C1 SDA/SCL: PB9/PB8

  • PWM1_CH1: PA8

  • USER_PB: PC13

  • LD1: PA5

  • USB_DC DM/DP: PA11/PA12

System Clock

The on-board 8MHz crystal is used to produce a 72MHz system clock with PLL.

Programming and Debugging

The stm32f103_mini board supports the runners and associated west commands listed below.

flash debug

Applications for the stm32f103_mini board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

There are 2 main entry points for flashing STM32F1X SoCs, one using the ROM bootloader, and another by using the SWD debug port (which requires additional hardware such as ST-Link). Flashing using the ROM bootloader requires a special activation pattern, which can be triggered by using the BOOT0 pin.

Flashing an application to stm32f103 mini

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b stm32f103_mini samples/basic/blinky
west flash

You will see the LED blinking every second.

Debugging

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

# From the root of the zephyr repository
west build -b stm32f103_mini samples/basic/blinky
west debug

References