STM32 concept and installation [day 1]

One 、 cognition STM32

1、STM32 Concept

STM32: STMicroelectronics is based on ARM The company's Cortex-M Kernel developed 32 Bit high performance 、 Low power MCU . ST: Italian French semiconductor
M: be based on ARM The company's Cortex-M The high performance of the kernel 、 Low power MCU

32：32 Bit MCU

2、STM32 Developed products

STM32 Developed products ： Unmanned aerial vehicle (uav) 、 Sweeping robot 、3D The printer 、 Balancing machine 、 Smart bracelets, etc

3、 Study STM32 Corresponding recruitment position

Recruitment position ： MCU development engineer 、 SCM software engineer 、STM32 Development Engineer 、 Embedded Development Engineer 、 Embedded Software Engineer .

Two 、ARM And STM32

` Embedded system   Application centric , Based on computer technology , Software and hardware can be reduced , To adapt the application system to the function 、 reliability 、 cost 、 Special computer system with strict requirements for volume and power consumption .（ written examination ）  Characteristics of embedded system   Hardware features   Small volume 、 High integration efficiency .  For specific applications .  Low power consumption 、 Good electromagnetic compatibility .  Software features   The development of embedded software is closely related to hardware .  Software code requires high efficiency and high reliability .  Software is generally solidified in Flash or Rom in .  The software system has high real-time performance .  It is generally used C Language development .`

1、ARM And STM32

`ARM－－Advanced RISC Machine ARM It's the name of a British electronics company  ARM Dare to be the first in the world , Pioneered chipless Production mode of , That is, the company does not produce chips , Nor design chips , It's about designing efficient IP（ intellectual property right ） kernel , Licensed to semiconductor companies . ARM Provides a range of kernels 、 System expansion 、 Microprocessor and system chip solutions  ARM It's universal 32 position RISC processor  ARM It is a high-performance processor with low power consumption  ARM Three cores of the chip :Cortex-X1、Cortex-A、Cortex-R、Cortex-M ARM Cortex-A  Series is an application processor  ARM stay Cortex-A Series processors can be sorted roughly as ：Cortex-A78 processor Cortex-A77 processor 、Cortex-A76 processor 、Cortex-A57 processor 、Cortex-A53 processor 、Cortex-A15 processor 、Cortex-A9 processor 、Cortex-A8 processor 、Cortex-A7 processor 、Cortex-A5 processor 、ARM11 processor 、ARM9 processor 、ARM7 processor   product ： mobile phone 、 Flat 、 TV 、 Smart speaker, etc  ARM Cortex-R For real-time processors   Reliability is required 、 High availability 、 Fault tolerance 、 The embedded system with maintainability and real-time response provides high-performance computing solutions .  High performance ： Fast processing capability combined with high clock frequency   real time ： Processing power meets hard real-time limits in all situations   Security ： A reliable and reliable system with high fault tolerance   economic ： For optimal performance 、 Power and area features . ARM Cortex-M Processor family  ARM Cortex-M The processor family is a family of energy-efficient, upward compatible 、 Easy to use processor , Help developers meet the needs of future embedded applications . Provide more functions at a lower cost 、 Increasing connectivity 、 Improve code reuse and energy efficiency .  Lower power consumption   The code is smaller   Easier to use   More competitive  Cortex-M  Series cost and power sensitive MCU And terminal applications （ Such as intelligent measurement 、 Man machine interface equipment 、 Automotive and industrial control systems 、 Large household appliances 、 Consumer products and medical devices ） The mixed signal equipment of is optimized . Cortex-M The series is subdivided into M0、M3、M4、M7 And ultra-low power consumption M0+  product ： Unmanned aerial vehicle (uav) 、 Sweeping robot 、3D The printer 、 Balancing machine 、 Smart bracelets, etc `

3、 ... and 、 Development environment installation and engineering construction

1、 soft 、 Hardware preparation

Hardware preparation ： Guangdong inlay STM32F407ZET6 Development board 、jlink Downloader 、 The computer . Software preparation ：
（1）keilv5 Software , Download url ：https://www.keil.com/download/product/（ Software path ：D:\STM32\STM32 Class materials \STM32 Development of information \ development environment \MDK5\mdk528a.exe）
（2）STM32 Developed library functions , Download url ：https://www.keil.com/dd2/Pack/（ route ：D:\STM32\STM32 Class materials \STM32F4 Device support package \Keil.STM32F4xx_DFP.1.0.8.pack）
（3）STM32F4 Official information ：https://www.stmcu.org.cn/（ route ：D:\STM32\STM32 Class materials \STM32 Development of information \ Documentation ）

2、 STM32 Chip type identification

3、 Install software and library support package

All software is opened with administrator privileges . Turn off antivirus software , Computer firewall .
（1） install keil v5 Software , Reference blog ：https://blog.csdn.net/wwwqqq2014/article/details/115412594
（2） Double click installation STM32 Library support package ：Keil.STM32F4xx_DFP.1.0.8.pack（ route ：D:\STM32\STM32 Class materials \STM32F4 Device support package ）
（3） Reference documents ：STM32 Project establishment steps .docx establish STM32 engineering
（4） Reference documents ：J-Link To configure .docx, Complete the downloader configuration

Four 、 problem

1、 Access to relevant information , Understand what registers are

Registers are part of the CPU . Register is a high-speed storage component with limited storage capacity , They can be used to hold instructions 、 Data and address . In the control unit of the CPU , The registers included are instruction registers (IR) And program counter (PC). In the arithmetic and logic components of the central processing unit , Registers have accumulation device (ACC).

2、 The function of register

1、 It can perform arithmetic and logic operations on the data in the register
2、 An address stored in a register can be used to point to a location in memory , Namely addressing
3、 Peripheral devices that can be used to read and write data to the computer .

3、 Assumed variable unsigned char temp = 0x78, Please put the second position as 1, Sixth place Qing 0（ Sixth position 0）, It will not affect other bits

0x78( Hexadecimal ) 0 1 1 1 1 0 0 0
The first 7 position The first 0 position

 answer ：	
temp |=（0x01<<2）  or temp |=(1<<2)
temp &= ~(0x01<<6)  or temp &=~(1<<6)

Study in blocks , Next section see you