This is the documentation for the latest (master) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

OLIMEX-STM32-H103

Overview

The OLIMEX-STM32-H103 is a simple development board based on the STMicroelectronics STM32F103RBT6 ARM Cortex-M3 CPU, with all the MCU pins populated and accessible through two male 26-pin connectors.

OLIMEX-STM32-H103 top
OLIMEX-STM32-H103 bottom

OLIMEX-STM32-H103

Hardware

Information about the board can be found at the OLIMEX-STM32-H103 website and OLIMEX-STM32-H103 user manual. The OLIMEX-STM32-H103 schematic is also available.

The ST STM32F103RB Datasheet contains the processor’s information and the datasheet.

Supported Features

The OLIMEX STM32-H103 supports the following hardware features:

Interface

Controller

Driver/Component

NVIC

on-chip

nested vectored interrupt controller

SYSTICK

on-chip

system clock

UART

on-chip

serial port

GPIO

on-chip

gpio

I2C

on-chip

i2c

PWM

on-chip

pwm

SPI

on-chip

spi

USB

on-chip

USB device

ADC

on-chip

adc

Other hardware features are not supported by the Zephyr kernel.

Connections and IOs

Default Zephyr Peripheral Mapping:

  • UART_1 TX/RX: PA9/PA10

  • UART_2 TX/RX: PA2/PA3

  • UART_3 TX/RX: PC10/PC11 (not enabled)

  • I2C_1 SCL/SDA : PB6/PB7

  • I2C_2 SCL/SDA : PB10/PB11

  • PWM_1_CH1: PA8

  • SPI_1 NSS_OE/SCK/MISO/MOSI: PA4/PA5/PA6/PA7

  • SPI_2 NSS_OE/SCK/MISO/MOSI: PB12/PB13/PB14/PB15

  • USB_DC DM/DP/DISC/PWR: PA11/PA12/PC11/PC4 (not enabled)

  • ADC_1: PA1

System Clock

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

Serial Port

The board has 3 U(S)ARTs, UART1 and UART2 are enabled by default, with UART2 used as Zephyr’s console. Default settings are 115200 8N1.

On-Board LEDs

The board has one on-board green LED that is connected to PC12, which is active low.

There is also a red power LED neither connected nor controlled by the MCU.

On-Board Button

The board has one user button connected to PA0.

USB

USB is not enabled by default, however PC4 is configured by default as an ADC input to sense the USB voltage (see schematic). It is possible to disconnect it by desoldering the appropriate pad in the PCB.

The board uses PC11 to disconnect the pull-up resistor on the USB-DP line.

External Connectors

JTAG/SWD debug

PIN #

Signal Name

PIN #

Signal Name

1

+3.3V

2

TVCC 3.3V

3

PB4 / TRST

4

GND

5

PA15 / TDI

6

GND

7

PA13 / TMS / SWDIO

8

GND

9

PA14 / TCK / SWCLK

10

GND

11

NC

12

GND

13

PB3 / TDO

14

GND

15

RST

16

GND

17

NC

18

GND

19

NC

20

GND

EXTENSION 1

PIN #

Name / STM32F103 Port

PIN #

Name / STM32F103 Port

1

PA11 / USB_DM

2

PA8 / PWM_1_CH1

3

PA12 / USB_DP

4

PA9 / UART1_TX

5

+3.3V

6

GND

7

PA10 / UART1_RX

8

PC10

9

PC11 / USB_DISC

10

PC12 / LED

11

PD2

12

PB5/I2C1_SMBA

13

PB6 / I2C1_SCL

14

PA6 / SPI1_MISO

15

PB7 / I2C1_SDA

16

PB8

17

PB9

18

PA5 / SPI1_SCK

19

PC0

20

PC1

21

PB0

22

PA7 / SPI1_MOSI

23

VBAT

24

PC13

25

RST

26

PB1

EXTENSION 2

PIN #

Name / STM32F103 Port

PIN #

Name / STM32F103 Port

1

VDDA

2

PC2

3

GNDA

4

PA0 / BUTTON

5

+3.3V

6

GND

7

PA2 / USART2_TX

8

PA1 / ADC_1

9

PC3

10

PA3 / USART2_RX

11

PA4 / SPI1_NSS

12

PC4 / USB-P

13

PC5

14

PB10 / I2C2_SCL

15

P11 / I2C2_SDA

16

PB13 / SPI2_SCK

17

PB12 / SPI2_NSS

18

PB14 / SPI2_MISO

19

PB15 / SPI2_MOSI

20

PC6

21

PC7

22

PC8

23

+5V USB

24

PC9

25

GND

26

VIN

Programming and Debugging

This board does not include any embedded debug tool interface, instead you will have to use an external probe connected to the available 20-pin JTAG connector to progran and debug the board. Both JTAG and SWD are supported.

By default when using west debug ST-Link will be used with OpenOCD’s SWD transport, but it is also possible to use JTAG with the Olimex ARM-USB-OCD-H probe, for instance. For the latter, you should replace the file openocd.cfg by openocd_olimex_jtag.cfg, located in the board’s support directory.

Flashing

Here is an example for the Button application.

# From the root of the zephyr repository
west build -b olimex_stm32_h103 samples/basic/button
west flash

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 olimex_stm32_h103 samples/hello_world
west debug

References