Project template for STM32F4-Discovery Boards

This is a simple bare-metal project template for the STM32F4 Discovery board. It is based on:

• libopencm3 example code

Prerequisites

• Install gcc-arm-embedded and make sure the arm-none-eabi-*-commands are in your path
• Install OpenOCD

Documentation

The STM32F4 Discovery board is an inexpensive evaluation board for the STM32F407VG chips. You might want to keep copies of these documents around:

• RM0090: STM32F4xx Advanced ARM-based 32-bit MCUs Reference Manual
• STM32F407xx Technical Datasheet
• UM1472: STM32F4 High-Performance Discovery Board User Manual

Usage

First, you need to grab and compile a copy of libopencm3:

$ git submodule init
$ git submodule update
$ cd libopencm3
$ make

This will compile the library. Afterwards, change into the src directory and build the example:

$ cd ../src
$ make

Connect your STM32-Discovery board and run

$ make flash

to upload the binary into the microcontroller. In order to see the USART output, connect a 3V3 TTL adaptor to PA2 (USART2_TX). You can use screen to see the output:

$ screen /dev/ttyUSB0 115200

USART Port Mappings

Currently, the example uses USART2. The other USART ports can also be used, for example:

• USART1: PB6, PB7
• USART6: PC6, PC7 Note: If you use the STM32F4 Expansion board, the UART6 should be mapped to the serial port of this board. However, I wasn't able to get this running. Attaching an FTDI USB-TTL-Adapter works fine for these pins.

Tested Host Systems

The template has been tested on the following host systems:

• Ubuntu Linux 14.04
• Mac OS Mavericks