Design with STM 32F407 Discovery Kit in Cirkit DesignerThe STM32F407 Discovery Kit is a development board designed by STMicroelectronics to facilitate prototyping and testing of embedded systems. It features the STM32F407 microcontroller, a high-performance ARM Cortex-M4 processor with advanced peripherals and interfaces. This board is ideal for developers working on applications such as motor control, audio processing, industrial automation, and IoT devices.
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
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
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
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 DesignerThe STM32F407 Discovery Kit provides access to the microcontroller's pins via two 50-pin headers. Below is a summary of key pins and their functions:
| Pin Name | Function | Description |
|---|---|---|
| VDD | Power Supply | 3.3V power supply for the board |
| GND | Ground | Ground connection |
| PA0-PA15 | GPIO/Analog/Digital I/O | General-purpose I/O pins |
| PB0-PB15 | GPIO/Analog/Digital I/O | General-purpose I/O pins |
| PC0-PC15 | GPIO/Analog/Digital I/O | General-purpose I/O pins |
| PD0-PD15 | GPIO/Analog/Digital I/O | General-purpose I/O pins |
| USART1_TX | UART Transmit | Transmit data via UART |
| USART1_RX | UART Receive | Receive data via UART |
| SPI1_MOSI | SPI Master Out, Slave In | SPI data output |
| SPI1_MISO | SPI Master In, Slave Out | SPI data input |
| SPI1_SCK | SPI Clock | SPI clock signal |
| I2C1_SCL | I2C Clock | I2C clock signal |
| I2C1_SDA | I2C Data | I2C data signal |
| USB_DM | USB Data- | USB differential data line |
| USB_DP | USB Data+ | USB differential data line |
For a complete pinout, refer to the official STM32F407 Discovery Kit datasheet.
Powering the Board:
Programming the Microcontroller:
Connecting Peripherals:
Running the Program:
Although the STM32F407 Discovery Kit is not directly compatible with Arduino, it can communicate with an Arduino UNO via UART. Below is an example of how to send data from the STM32F407 to an Arduino UNO:
STM32F407 Code (Using STM32CubeIDE):
#include "stm32f4xx_hal.h"
UART_HandleTypeDef huart1; // UART handle for USART1
void SystemClock_Config(void);
void MX_USART1_UART_Init(void);
int main(void) {
HAL_Init(); // Initialize the HAL library
SystemClock_Config(); // Configure the system clock
MX_USART1_UART_Init(); // Initialize UART1
char message[] = "Hello from STM32F407!\r\n";
while (1) {
HAL_UART_Transmit(&huart1, (uint8_t *)message, sizeof(message) - 1, HAL_MAX_DELAY);
HAL_Delay(1000); // Wait for 1 second
}
}
// UART1 initialization function
void MX_USART1_UART_Init(void) {
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&huart1);
}
Arduino UNO Code:
void setup() {
Serial.begin(9600); // Initialize serial communication at 9600 baud
}
void loop() {
if (Serial.available()) {
// Read data from STM32F407 and print it to the Serial Monitor
String data = Serial.readString();
Serial.println("Received: " + data);
}
}
Board Not Detected by PC:
Program Not Running:
GPIO Pins Not Responding:
Debugging Not Working:
Can I power the board using a battery? Yes, you can use a 3.7V LiPo battery or a 7-12V external power source.
Is the STM32F407 Discovery Kit compatible with Arduino libraries? No, but you can use STM32 HAL or LL libraries to achieve similar functionality.
How do I update the ST-LINK firmware? Use the ST-LINK Utility software provided by STMicroelectronics to update the firmware.
For further assistance, refer to the official STM32F407 Discovery Kit user manual and datasheet.