STM32F407 Microcontroller: Features, Specifications, Development Project

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STM32F407 Series MCU

In the field of embedded systems, microcontrollers, as key components, play an important role in scenarios such as automatic control, Internet of Things, and industrial applications. The STM32F407 launched by ST Company is a high-performance and low-power 32-bit microcontroller that has attracted market attention due to its excellent functions and ease of use. In this article, we will delve into the features, specifications, application areas and development environment of STM32F407.

About STM32F407

The STM32F407 series of chips is a high-performance microcontroller launched by STMicroelectronics based on the ARM Cortex™-M4 core. It uses a 90-nanometer NVM process and ART (Adaptive Real-Time Memory Accelerator™).

STM32F407 Features

The STM32F407 is based on the ARM Cortex-M4 core, has DSP instructions and a floating-point unit (FPU), and has a clock frequency of up to 168MHz. Here are its main features:

  • High Performance

Equipped with a 32-bit Cortex-M4 core, which supports floating-point operations and low clock cycle latency, it can provide high-speed computing capabilities.

  • Low power Consumption

Dynamic voltage adjustment technology is used to switch between different power consumption modes and reduce system energy consumption.

  • Multiple Storage Configurations

Up to 1MB Flash and 192KB RAM to meet the storage space requirements of various applications.

  • Powerful Peripheral Support

STM32F407 has rich communication interfaces, such as SPI, I2C, UART, etc.; it supports up to 3 12-bit ADC converters, 2 DAC converters and high-resolution timers.

  • Safety and Reliability

The built-in hardware CRC module provides real-time checksum error detection function; the Watchdog timer can monitor the system running status and prevent software deadlock.

STM32F407 Specifications

SpecificationDetails
MCU ModelSTM32F407ZGT6
Flash Memory1MB
Clock FrequencyUp to 168MHz
ADCThree 12-bit
DACTwo 12-bit
DMATwo DMA controllers
TimersUp to 17 timers
GPIOUp to 120 configurable GPIO pins
InterfacesBuilt-in I2C, SPI, USART, I2S, CAN, and SDIO communication interfaces

Application of STM32F407

Thanks to its flexibility and easy scalability, STM32F407 is widely used in various intelligent scenarios, including but not limited to:

  • Internet of Things (IoT) devices

The low power consumption of STM32F407 makes it suitable as the core processing unit of IoT devices such as sensors and controllers.

  • Industrial automation

In fields such as CNC machine tools and industrial robots, STM32F407 can be responsible for system control, data acquisition and processing, and communication with peripheral devices.

  • Consumer electronics

STM32F407 can be used in consumer electronics fields such as smart homes and wearable devices to meet consumers’ requirements for performance and power consumption.

STM32F407 Development Resource

To facilitate developers, ST provides a wealth of development resources and tool support, including:

  • Discovery and Nucleo series development boards
  • Integrated development environments (IDEs) such as Keil uVision and IAR
  • JLINK, CMSIS-DAP, ULINK or STLINK debugger
  • STM32CubeF4 Software development kit based on HAL/HLL library

These resources help simplify the development process, shorten the development cycle, and enable developers to obtain technical support, share experiences and learn resources.

HAL Library

HAL library, Hardware Abstraction Layer, is actually the peripheral driver package of STM32F407. The code file is located at path:\Drivers\STM32F4xx_HAL_Driver.

An Example of STM32F4xx HAL Library
An Example of STM32F4xx HAL Library

CMSIS

CMSIS (Cortex Microcontroller Software Interface Standard) is a driver package officially designed by ARM. The block diagram is as follows:

Overview
CMSIS Structure (Image Credit: Keil)

With this CMSIS software package, ARM is expected to unify the peripheral drivers, DSP digital signal processing, downloaders and APIs of various mainstream RTOSs from various chip manufacturers.

STM32CubeMX is a graphics development software launched by ST in 2014 to facilitate users to configure clocks, peripherals, pins, RTOS and various middleware. The block diagram is as follows:

Open the STM32CubeMX

Through this graphics software, you can easily generate engineering code and support compilers such as MDK, IAR, and TrueSTUDIO.

STM32F407 Development Board Project

In this development experiment, we use the HAL library to light an LED or make an LED running light.

Step 1: Open STM32CubeMX, find the pin corresponding to the LED, and configure it as GPIO output.

Configure LED's pin as GPIO output in STM32CubeMX
Configure LED's pin as GPIO output in STM32CubeMX

Step 2: Select Serial Wire in SYS. Only if it is selected, subsequent projects can be burned normally using st-link.

Select Serial Wire Debug in SYS Mode and Configuration
Select Serial Wire Debug in SYS Mode and Configuration

Step 3: Turn on the external clock and enable it to reach the maximum frequency of 407 168mhz.

Select High Speed Clock (HSE) in RCC Mode and Configuration
Select High Speed Clock (HSE) in RCC Mode and Configuration

Step 4: Generate engineering code.

Generate Code for STM32F407 Project in STM32CubeMX
Generate Code for STM32F407 Project in STM32CubeMX

The generated code is as shown below, and the pin and clock configurations are all configured.

				
					void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct= {0}:

/*GPIO Ports Clock Enable */
_ _HAL_RCC_GPIOF_CLK_ENABLE():
_ _HAL_RCC GPIOH_CLK_ENABLE():
_ _HAL RCC GPIOA CLK_ENABLE():

/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOF, GPIO_PIN_9, GPIO_PIN_SET):
HAL_GPIO_WritePin(GPIOF, GPIO_PIN_10, GPIO_PIN_RESET):

/*Configure GPIO pins:PF9 PF10 */
GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10:
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP:
GPIO_InitStruct.Pul1 =GPIO_NOPULL:
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW:
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct):

/*EXTI interrupt init*/
HAL_NVIC_SetPriority(EXTI2_IRQn, 0, 0):
HAL NVIC_EnableIRQ(EXTI2_IRQn):
HAL_NVIC_SetPriority(EXTI3_IRQn, 0, 0):
HAL_NVIC_EnableIRQ(EXTI3_IRQn):
HAL_NVIC_SetPriority(EXTI4_IRQn, 0, 0):
HAL_NVIC_EnableIRQ(EXTI4_IRQn):

}
				
			

Then write the program to control the LED light in while(1) of the main function.

				
					while (1)
{
/* USER CODE END WHILE */

//Light up the LED
//HAL_GPIO_WritePin(GPIOF, GPIO_PIN_10|GPIO_PIN_9, GPIO_PIN_RESET);

{
//LED flashes
HAL_GPIO_TogglePin(GPIOF, GPIO_PIN_9|GPIO_PIN_10);
HAL_Delay(1000);
}
/* USER CODE BEGIN 3 */
}
				
			

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About Author

Aidan Taylor
Aidan Taylor

I am Aidan Taylor and I have over 10 years of experience in the field of PCB Reverse Engineering, PCB design and IC Unlock.

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