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This paper shows the identification operation of STM32 external interrupt EXTI The content involves: Identification of external interrupt EXTI IO port input and output External interrupt processing of key External interrupt capture method preface Here we only explain the code of the core part. The setting of some variables and the in ...

This article will introduce the theory and practical application of I2C communication mode from theory to practice. The theory part mainly describes the physical structure of I2C bus, the relevant provisions in its protocol and several different communication processes. In the practice part, we will take a display module commonly used in var ...

catalogue The first part is the preface 1. Preparation knowledge 2. Commissioning purpose 3. Wiring mode of module and single chip microcomputer Part II Engineering Code 1. Code function description 2. SIM900A code for sending English SMS 3. SIM900A code for sending Chinese SMS 4,main.c document code The third part is the summary 1. ...

1, What is a capture counter? For example, we want to know the duration of a high-level input to a pin (the signal frequency is actually calculating the duration of the signal input). The timer in stm32 can certainly realize this function. The timer we just mentioned is not accurate at this time. It should be called counter, because the reali ...

Programming flow: Reset write command word: 0xcc (skip ROM instruction), 0x44 (start temperature conversion) Skip the command word: because DS18b20 is a single bus device, and a single bus can mount many devices, ROM is used to store the id number of the device. Delay 700~900ms and wait for the completion of temperature conversion Reset wri ...

catalogue background Implementation method development environment code implementation reference resources background When using STM32 for project development, two channels of input acquisition are required. At the beginning, using different timers for acquisition can meet the requirements. However, when a new demand comes, multiple PW ...

1. Brief introduction to LCD12864 display principle 1.1 brief introduction to liquid crystal principle In fact, the LCD screen is composed of pixels, and there are several pixels in each row and column. The data bit width (or pixel depth) occupied by each pixel is different for different types of screens. For example, for A true color screen, ...

Because I just need to use dual computer communication to do my homework. By the way, I have found many methods on the Internet. I have tried to use Bluetooth communication, but I can only send strings (my personal ability can only reach this step, and I will further study Bluetooth communication later). The final implementation method is Async ...

1) Experimental platform: punctual atom STM32MP157 development board 2) Purchase link: https://item.taobao.com/item.htm?&id=629270721801 3) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-318813-1-1.html 4) Official station B of punctual atom: https://space.bilibili.com/394620890 5) Punc ...

1, Introduction to TFT-LCD TFT-LCD (thin film transistor liquid crystal display) is a thin film transistor liquid crystal display. TFT-LCD is different from the simple matrix of passive TN-LCD and STN-LCD. It is equipped with a thin film transistor (TFT) on each pixel of the LCD, which can effectively overcome the crosstalk when it is not g ...