OLIMEX-STM32-H405

Overview

The OLIMEX-STM32-H405 board is based on the STMicroelectronics STM32F405RG ARM Cortex-M4 CPU.

Hardware

Information about the board can be found at the OLIMEX-STM32-H405 website and OLIMEX-STM32-H405 user manual. The ST STM32F405RG Datasheet contains the processor’s information and the datasheet.

Supported Features

The olimex_stm32_h405 board configuration 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
USB	on-chip	USB device
WATCHDOG	on-chip	independent watchdog
COUNTER	on-chip	rtc
RNG	on-chip	random number generator

Other hardware features have not been enabled yet for this board.

Pin Mapping

LED

USER_LED (green) = PC12
PWR_LED (red) = power

Push buttons

USER_BUTTON = PA0
RST = NRST

External Connectors

JTAG debug

PIN #	Signal Name	Pin #	Signal Name
1	+3.3V	2	+3.3V
3	PB4 / TRST	4	GND
5	PA15 / TDI	6	GND
7	PA13 / TMS	8	GND
9	PA14 / TCK	10	GND
11	GND	12	GND
13	PB3 / TDO	14	GND
15	GND	16	GND
17	RST	18	GND
19	GND	20	GND

USB Type B

PIN #	Signal Name
1	+5V_USB
2	PA11 / USBDM
3	PA12 / USBDP
4	GND

EXT1 header

PIN #	Signal Name	Pin #	Signal Name
1		2
…	…	…	…
9	PC11 (USB DISC)	10	PC12 (LED)
…	…	…	…
25		26

EXT2 header

PIN #	Signal Name	Pin #	Signal Name
1		2
…	…	…	…
5		6	GND
7	PA2 / USART2_TX	8
9		10	PA3 / USART2_RX
…	…	…	…
25		26

System Clock

OLIMEX-STM32-H405 has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 8 MHz. The processor can setup HSE to drive the master clock, which can be set as high as 168 MHz.

Programming and Debugging

The OLIMEX-STM32-H405 board does not include an embedded debug tool interface. You will need to use ST tools or an external JTAG probe. In the following examples a ST-Link V2 USB dongle is used.

Flashing an application to the Olimex-STM32-H405

The sample application Hello World is being used in this tutorial.

Connect the ST-Link USB dongle to your host computer and to the JTAG port of the OLIMEX-STM32-H405 board.

Now build and flash the application.

# From the root of the zephyr repository
west build -b olimex_stm32_h405 samples/hello_world
west flash

Run a serial host program to connect with your board:

$ minicom -D /dev/ttyACM0

After resetting the board, you should see the following message:

*** Booting Zephyr OS build v2.7.99-3008-g2341052abe7c  ***
Hello World! olimex_stm32_h405

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_h405 samples/hello_world
west debug