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 Zephyr stm32f103_mini 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

CLOCK

on-chip

reset and clock control

FLASH

on-chip

flash memory

WATCHDOG

on-chip

independent watchdog

ADC

on-chip

ADC Controller

PWM

on-chip

pwm

SPI

on-chip

spi

USB

on-chip

USB device

COUNTER

on-chip

rtc

Other hardware features are not yet supported in this Zephyr port.

The default configuration can be found in boards/others/stm32f103_mini/stm32f103_mini_defconfig

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

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