STM32 learning (Introduction)

stm32 The learning

Tips ： Blogging is the first time to practice , I hope to make more suggestions for deficiencies

Preface

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First , My humble opinion , Get something new , It's bullshit to understand the principle first , Because in many cases, we prefer to pay attention to what we see , So I think I got something I haven't seen , We can get a mature one first demo Run, right , But if a worker wants to do well, he must first sharpen his tools , In the bare metal programming software used by Xiaobian , Yes keil Follow cube,cube At present, it is a software that many newcomers learn, but I don't like it when I use it （ It is said on the Internet that there are some bug, Xiaobian didn't find , Just not used to it ）, And for the bottom layer, he seems to be shielded （ Some omissions ） So the first step is to make software

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One 、keil Installation

Xiaobian doesn't say much , I'll find you something of this level
link
Here is a few additional words. If there is nothing in it, leave a message in the comment area , Xiaobian will update to Baidu cloud , But there are many online

Two 、 run demo Before , So let's see stm32 What paves the way first

According to xiaobian , Whether it's stm32 Or other microcontrollers like aruino Follow 51, They are programmable chips that run the corresponding functions according to the compiled binary files , You can use language （c/c++/python/lua） Compiling , To control the io Pin to achieve data transmission or control external devices , Of course, they are all humble opinions , The more authoritative answer should be based on some kind of architecture company, what semiconductor , But it's none of my business , It doesn't matter to you , You can only use it when you are just getting started
Tips ： I still have to go back and see

3、 ... and 、 Run one demo Look at the phenomenon

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The simplest is the running water lamp , So let's learn from brother atomic's project ( For open source , I take atomic brother )
【 The lighting phenomenon needs to be updated 】

Four 、 Ask questions based on phenomena

1. How did you light the light

Obviously ,led It's LED, right , If led Common land , Then we just give him a high level light ：
library ：

GPIO_ResetBits(GPIOx,GPIO_Pin_x); 

register ：

GPIOB_ODR &= ~(1<<0); //  Lighting 1 
GPIOB_ODR |= (1<<0);  //  Lights out 1

Add ：GPIOB_ODR ——>#define GPIOB_ODR (*(unsigned int *)0x40010C0C) Address mapping

2. What did he do before lighting the lamp ( Power on and start )

STM32 There are three startup modes for series single chip computers , Users can use the Settings BOOT0 and BOOT1 Pin level status , To select the startup mode after reset （ draw pcb Can be connected externally when ）

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5、 ... and . problem

Other pins can be used to light the lamp ？ It may be used for other purposes ？

summary

Tips ： Here is a summary of the article ：

for example ： That's what we're going to talk about today , This article only briefly introduces pandas Use , and pandas Provides a large number of functions and methods that enable us to process data quickly and conveniently .