RT thread changes the print serial port (add other functions on the basis of BSP)

Preface

The chips used ：STM32F407ZG, Punctual atomic Explorer board

The configuration and of the environment on the official website BSP There are detailed descriptions of the production of , Of course, I am in the process of learning , Also made a simple note ： How to see RT-Thread file 、RT Project establishment and BSP Fast build _ Chaser - Bridge blog -CSDN Blog

And refer to it yourself BSP The production process can be established on your own board LED Light flashing .

But if you want to use other functions , You need to add BSP The new function , Turn on the bottom drive , And add RT in menucongfig Select function . 

The original RT-Thread Is the default USART1 Print information , Open here USART2 And through the serial port 2 Print the information .

One 、RT-Thread Of BSP Make

        Here is a simple description of the steps ：

1、 Copy generic template

 2、 Use CubeMX Tool configuration Engineering

STM32CubeMX Project establishment _ Chaser - Bridge blog -CSDN Blog

Be careful , In the use of RT It is clear that do not generate corresponding .c/.h file

3、board File modification in folder （board.c/h、Kconfig）、 see

4、ENV Tools menuconfig、package

5、ENV Tools scons

scons --target=...、scons、scons --dist： Build project 、 compile 、 Replication Engineering

Two 、 increase BSP The function of

         At the beginning, the template only opened one serial port and two GPIO, But in reality, it is impossible to use only these two functions , How to add BSP Function has become a very practical problem .

RT Of BSP It can be divided into three parts （ in the light of STM32 Speaking of , Own opinion ）：RT-Thread brief introduction

1. CubeMX structure BSP The bottom driver of
2. RT Take the underlying drivers to form the component and service layer , Provides the function of API, And introduces the real-time operation kernel
3. Developers use RT Of API Development application layer , And form your own application package （App）  

2.1、CubeMX add to BSP The underlying driver of

         For the convenience of study , First, add similar functions ：USART1/2、UART4, Others will be updated gradually later BSP Construction of functions .

 

Here, the serial port usually uses asynchronous two-wire communication , After generating the file, you can open stm32f1xx_hal_msp.c File view driver .

Above, UART4 Add to complete , such BSP The underlying driver has been configured , You can also try other functions first , You can also check other blogs in this column to learn .

2.2、RT Add BSP function

2.2.1、 add to Kcongfig file

Kconfig (rt-thread.org)：Kcongfig Of RT Working mechanism

config sentence ：config A new set of configuration options is defined

menu/endmenu sentence ： Used to generate menus

if/endif sentence ： It's a conditional judgment

menuconfig sentence ： Indicates the configuration item with menu

choice/endchoice sentence ： Combine several similar configuration options , Users can select a set of configuration items

comment sentence ： It appears on the first line of the interface , Used to define some prompt messages

source sentence ： Used to read... In another file Kconfig file

• Add serial port 2 After Kconfig file （ stay board In the folder ）

2.2.2、ENV in menuconfig Select the corresponding function from the menu

•   Use menuconfig Interface , Serial port 2 The choice of

2.2.3、 View and configure rtconfig.h 

• Select a good function to automatically update after exiting rtconfig.h Corresponding macro in

•   stay rtconfig.h Change the serial port printing mode to serial port 2

 2.2.4、 Change the main function

 

 2.2.5、 Hardware link serial port 2 And open the debugging assistant