Introduction to development using Hal library, stm32cubemx and keil 5 (I): turn on an LED light (nucleo-f411re)

This tutorial to light up a lamp LED Light for the purpose of demonstration for everyone STM32CubeMX、Keil、ST-Link Development STM32 The general method of procedure .

One 、 Preparation before study

Hardware ： A piece of STM32 Development board , One ST-Link;（ The development board I use is NUCLEO-F411RE）
Software ： packed ST-Link Driver program , packed STM32CubeMX, packed Keil;
file ： The schematic diagram of the development board 、 Chip reference manual and HAL Driving instructions .
attach ：STM32F4xx HAL Driving instructions

Two 、 Create a new STM32CubeMX engineering

open STM32CubeMX, And then click New Project：

choice Series（ series ）、Lines（ series ）、Package（ encapsulation ）, Then select yourself MCU Model , Click on OK：（ my MCU yes STM32F411RE,64 Pin LQFP encapsulation ）

At this point STM32CubeMX The project has been established ：

3、 ... and 、 Configure corresponding pins , Then generate Keil engineering

Open the development board schematic , see LED The pin corresponding to the lamp ：（ As shown in the figure , Give Way PA5 When the pin outputs high level, it will light up LED）

Click on Pinout, And then click LED The pin corresponding to the lamp , choice GPIO_Output Pattern ：（ take PA5 Set to the output mode of general input and output port , Please refer to Reference manual Medium GPIO introduction）

Since this routine does not need to configure the clock 、 Middleware and peripherals , There is no need to calculate power consumption , therefore Clock Configurantion、Configuration、Power Consumption Caculator Keep default .
Click on the menu bar Project->Settings, Input STM32CubeMX Project name 、 Save the path and your own tool chain / Integrated compilation environment ,Code Generator The settings in remain the default , And then click OK：（ my STM32CubeMX The name of the project is LD2, Save path as desktop , The integrated compilation environment is Keil 5）

Then click... On the menu bar Project->Generate Code, Or click Shortcut key generation contains HAL Library Keil Project and initialization code . At this point, a message appears on the corresponding path STM32CubeMX Folder with project name . Open the folder on the corresponding path , Among them .ioc A file with an extension is STM32CubeMX Engineering documents of , The folder with the name of integrated compilation environment contains this STM32CubeMX The project file of this integrated compilation environment with the project name ,Drivers The directory contains drivers ,Inc The directory contains header files ,Src The directory contains the source code ：（LD2.ioc The file is just created STM32CubeMX engineering ,MDK-ARM In folder LD2.uvprojx The file is just generated Keil engineering ）

Four 、 stay Keil Add your own code to the project , Then compile 、 download

open Keil engineering , Find where to add code according to the comments . Please do not add code beyond the prompt , Otherwise, generate... Again STM32CubeMX The project will be deleted ：（ because STM32CubeMX The initialization code has been generated for us , So we just need to /* USER CODE BEGIN 2 / And / USER CODE END 2 */ Add a sentence between to make PA5 Output high level code ）

open HAL The driver manual finds what we need API, Then add the code according to the instructions ：（ According to the instructions, make PA5 The code of output high level is HAL_GPIO_WritePin (GPIOA, GPIO_PIN_5, GPIO_PIN_SET);）

Add code to the project , And then click compile , use ST-Link After connecting the computer and the development board, click download ：

5、 ... and 、 Reset the development board after downloading , Then the development board LD2（ A green light ） bright