ST STM32F072 Evaluation

Overview

The STM32F072-EVAL Discovery kit features an ARM Cortex-M0 based STM32F072VBT6 MCU with a wide range of connectivity support and configurations. Here are some highlights of the STM32F072-EVAL board:

  • Four 5 V power supply options: power jack, ST-LINK/V2 USB connector, user USB connector, or daughter board

  • Stereo audio jack, which supports a headset with microphone connected to DAC and ADC of STM32F072VBT6.

  • 2G Byte (or more) SPI interface MicroSD card

  • I2C compatible serial interface temperature sensor

  • RF E2PROM

  • RS232 and RS485 communication

  • IrDA transceiver

  • IR LED and IR receiver

  • SWD debug support, ST-LINK/V2 embedded

  • 240x320 TFT color LCD connected to SPI interface of STM32F072VBT6

  • Joystick with 4-direction control and selector

  • Reset and tamper buttons

  • Four color user LEDs and two LEDs as MCU low power alarm

  • Extension connector for daughter board or wrapping board

  • MCU voltage choice: fixed 3.3 V or adjustable from 1.65 V to 3.6 V

  • USB full-speed connector

  • Touch sensing buttons

  • RTC with backup battery

  • CAN2.0A/B compliant connector

  • Light Dependent Resistor (LDR)

  • Potentiometer

  • Two HDMI connectors with DDC and CEC

  • Smart Card slot

  • Motor control connector

STM32F072-EVAL

Hardware

STM32F072-EVAL Discovery kit provides the following hardware components:

  • STM32F072VBT6 in LQFP100 package

  • ARM® 32-bit Cortex® -M0 CPU

  • 48 MHz max CPU frequency

  • VDD from 2.0 V to 3.6 V

  • 128 KB Flash

  • 16 KB SRAM with HW parity

  • GPIO with external interrupt capability

  • one 12-bit ADC with 16 channels

  • one 12-bit D/A converters with 2 channels

  • RTC

  • Advanced-control Timer

  • General Purpose Timers (8)

  • Watchdog Timers (2)

  • USART (4)

  • I2C (2)

  • SPI (2)

  • CAN

  • USB 2.0 OTG FS with on-chip PHY

  • CRC calculation unit

  • DMA Controller

  • HDMI CEC Controller

  • 24 capacitive sensing channels for touchkey, linear, and rotary touch sensors

  • Up to 87 fast I/Os: 68 I/Os with 5V tolerant capability and 19 with independent supply

More information about STM32F072VB can be found here:

Supported Features

The Zephyr stm32f072_eval 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

PWM

on-chip

pwm

CLOCK

on-chip

reset and clock control

WATCHDOG

on-chip

independent watchdog

Other hardware features are not yet supported on this Zephyr porting.

The default configuration can be found in boards/st/stm32f072_eval/stm32f072_eval_defconfig

Pin Mapping

STM32F072-EVAL Discovery kit has 6 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32F072-EVAL board User Manual.

Default Zephyr Peripheral Mapping:

  • UART_2_TX : PD5

  • UART_2_RX : PD6

  • TAMPER_PB : PC13

  • JOYSTICK_RIGHT_PB : PE3

  • JOYSTICK_LEFT_PB : PF2

  • JOYSTICK_UP_PB : PF9

  • JOYSTICK_DOWN_PB : PF10

  • JOYSTICK_SEL_PB : PA0

  • LD1 : PD8

  • LD2 : PD9

  • LD3 : PD10

  • LD4 : PD11

System Clock

STM32F072-EVAL System Clock could be driven by an internal or external oscillator, as well as the main PLL clock. By default the System clock is driven by the PLL clock at 48MHz, driven by an 8MHz high speed internal clock.

Serial Port

STM32F072-EVAL Discovery kit has up to 4 UARTs. The Zephyr console output is assigned to UART2. Default settings are 115200 8N1.

Programming and Debugging

STM32F072-EVAL Discovery kit includes an ST-LINK/V2 embedded debug tool interface.

Applications for the stm32f072_eval board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.

Alternatively, OpenOCD or JLink can also be used to flash the board using the --runner (or -r) option:

$ west flash --runner openocd
$ west flash --runner jlink

Flashing an application to STM32F072-EVAL

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b stm32f072_eval 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 stm32f072_eval samples/basic/blinky
west debug