How to Use STM 32F407 Discovery Kit: Examples, Pinouts, and Specs

Design with STM 32F407 Discovery Kit in Cirkit Designer

Introduction

The STM32F407 Discovery Kit is a development board manufactured by Microcontroller, featuring the STM32F4 series microcontroller (part ID: STM32F4). This board is designed to simplify prototyping and testing of embedded applications. It integrates the STM32F407 microcontroller, which is based on the ARM Cortex-M4 architecture, and includes a wide range of peripherals, sensors, and interfaces to support diverse development needs.

Explore Projects Built with STM 32F407 Discovery Kit

STM32F103C8T6-Based Spectral Sensor with ST7735S Display and Pushbutton Control

This circuit features an STM32F103C8T6 microcontroller interfaced with a China ST7735S 160x128 display and two spectral sensors (Adafruit AS7262 and AS7261). It also includes two pushbuttons for user input, with the microcontroller managing the display and sensor data processing.

Open Project in Cirkit Designer

STM32 and Arduino Pro Mini Based Wireless Data Logger with OLED Display

This circuit integrates multiple microcontrollers (Maple Mini STM32F1, nRF52840 ProMicro, and Arduino Pro Mini) to interface with various peripherals including an SSD1306 OLED display, an SD card module, and a Si4463 RF module. The circuit is designed for data acquisition, storage, and wireless communication, with power supplied through a USB Serial TTL module.

Open Project in Cirkit Designer

Solar-Powered STM32-Based Automation System with Matrix Keypad and RTC

This circuit features an STM32F103C8T6 microcontroller interfaced with a membrane matrix keypad for input, an RTC DS3231 for real-time clock functionality, and a 16x2 I2C LCD for display. It controls four 12V geared motors through two MD20 CYTRON motor drivers, with the motor power supplied by a 12V battery regulated by a buck converter. The battery is charged via a solar panel connected through a solar charge controller, ensuring a renewable energy source for the system.

Open Project in Cirkit Designer

STM32F103C8T6-Based Water Level Monitoring and Communication System with SIM900A and LoRa Connectivity

This circuit features a microcontroller (STM32F103C8T6) interfaced with a SIM900A GSM module, an HC-SR04 ultrasonic sensor, a water level sensor, and a LoRa Ra-02 SX1278 module for long-range communication. The STM32F103C8T6 is configured to communicate with the GSM module and LoRa module via serial connections, and it reads data from the ultrasonic and water level sensors. An FTDI Programmer is connected for programming and serial communication with the microcontroller.

Open Project in Cirkit Designer

Common Applications and Use Cases

Embedded systems development
Prototyping IoT devices
Motor control applications
Audio processing and DSP applications
Educational purposes for learning ARM Cortex-M4 programming
Industrial automation and robotics

Technical Specifications

Key Technical Details

Specification	Value
Microcontroller	STM32F407VGT6 (ARM Cortex-M4, 32-bit)
Operating Voltage	3.3V
Clock Speed	Up to 168 MHz
Flash Memory	1 MB
SRAM	192 KB
GPIO Pins	82 (multiplexed with peripherals)
Communication Interfaces	USART, SPI, I2C, CAN, USB OTG, Ethernet
Analog Inputs	16 (12-bit ADC)
Timers	17 (including advanced control timers)
Debugging Interface	ST-LINK/V2 (onboard)
Power Supply	USB or external (5V)
Dimensions	100 mm x 65 mm

Pin Configuration and Descriptions

The STM32F407 Discovery Kit features multiple headers for GPIO and peripheral connections. Below is a summary of the key pin configurations:

GPIO Header Pinout

Pin Number	Pin Name	Functionality	Notes
1	VDD	3.3V Power Supply	Power output for peripherals
2	GND	Ground	Common ground
3	PA0	GPIO/ADC Input	Multiplexed with ADC_IN0
4	PA1	GPIO/ADC Input	Multiplexed with ADC_IN1
5	PB6	GPIO/I2C1_SCL	I2C1 Clock Line
6	PB7	GPIO/I2C1_SDA	I2C1 Data Line
7	PC13	GPIO/User Button Input	Connected to onboard button
8	PA9	GPIO/USART1_TX	UART Transmit
9	PA10	GPIO/USART1_RX	UART Receive
10	PC0	GPIO/ADC Input	Multiplexed with ADC_IN10

Power and Debugging Pins

Pin Name	Functionality	Notes
5V	External Power Input	Accepts 5V input
3.3V	Regulated Power Output	For powering external devices
GND	Ground	Common ground
SWDIO	Debugging Interface (SWD Data)	Used for programming/debugging
SWCLK	Debugging Interface (SWD Clock)	Used for programming/debugging

Usage Instructions

How to Use the STM32F407 Discovery Kit in a Circuit

Powering the Board:
- Connect the board to your computer via the onboard micro-USB connector for power and programming.
- Alternatively, supply 5V to the external power input pin.
Programming the Microcontroller:
- Use the onboard ST-LINK/V2 debugger to program the STM32F407 microcontroller.
- Compatible IDEs include STM32CubeIDE, Keil uVision, and IAR Embedded Workbench.
Connecting Peripherals:
- Use the GPIO headers to connect external sensors, actuators, or other devices.
- Ensure that the voltage levels of connected peripherals are compatible with the 3.3V logic level of the STM32F407.
Using Communication Interfaces:
- Configure USART, SPI, I2C, or CAN interfaces in your firmware to communicate with external devices.
- Refer to the STM32F407 datasheet for detailed configuration options.
Using the Onboard Peripherals:
- The board includes an onboard accelerometer, LEDs, and a user button. These can be accessed directly in your firmware.

Important Considerations and Best Practices

Voltage Levels: Ensure all connected peripherals operate at 3.3V logic levels to avoid damaging the microcontroller.
Clock Configuration: Properly configure the system clock in your firmware to achieve the desired performance.
Debugging: Use the ST-LINK/V2 interface for debugging and troubleshooting your code.
Static Protection: Handle the board with care to avoid damage from electrostatic discharge (ESD).

Example Code for Arduino IDE (Using STM32 Core)

The STM32F407 Discovery Kit can be programmed using the Arduino IDE with the STM32 core installed. Below is an example of blinking the onboard LED:

// Example: Blink onboard LED (connected to pin PD12)

// Define the onboard LED pin
#define LED_PIN PD12

void setup() {
  pinMode(LED_PIN, OUTPUT); // Set LED pin as output
}

void loop() {
  digitalWrite(LED_PIN, HIGH); // Turn LED on
  delay(500);                  // Wait for 500 ms
  digitalWrite(LED_PIN, LOW);  // Turn LED off
  delay(500);                  // Wait for 500 ms
}

Troubleshooting and FAQs

Common Issues and Solutions

Board Not Detected by Computer:
- Ensure the USB cable is functional and properly connected.
- Verify that the ST-LINK drivers are installed on your computer.
Program Not Running After Upload:
- Check the power supply to the board.
- Ensure the correct clock configuration in your firmware.
GPIO Pins Not Responding:
- Verify the pin mode configuration in your code.
- Check for short circuits or incorrect connections.
Debugging Interface Not Working:
- Ensure the SWDIO and SWCLK pins are not being used for other purposes.
- Verify the ST-LINK firmware is up to date.

FAQs

Q: Can I power the board using a battery?
A: Yes, you can power the board using a 5V battery connected to the external power input pin.

Q: Is the STM32F407 Discovery Kit compatible with Arduino libraries?
A: Yes, with the STM32 core installed in the Arduino IDE, you can use many Arduino libraries.

Q: How do I reset the board?
A: Press the onboard reset button to restart the microcontroller.

Q: Can I use the board for audio processing?
A: Yes, the STM32F407 microcontroller includes a floating-point unit (FPU) and DSP instructions, making it suitable for audio processing applications.