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1 Introduction to independent keys The keyboard is divided into coded keyboard and non coded keyboard. The recognition of the closing key on the keyboard is realized by a special hardware encoder, and the key coding number or key value is called the coding keyboard, such as the computer keyboard. The keyboard identified by software programming ...

1. Project overview Implement a mobile App that can control home devices and obtain relevant temperature and humidity information. App calls HTTP service on ECs; HTTP service encapsulates MQTT subscription and push requests to update the MQTT server; The esp8266 module is connected to the MQTT server through networking, sends the data tr ...

catalogue 0. Bloggers understand: 1. Experiment contents and steps: 2. Hardware description 3. Register description 3.1 SysTick clock and enable: 3.2 SysTick reload value register: 3.3 SysTick interrupt priority: 3.4 SysTick interrupt function: 4. Program design (register) 5. Program design (Standard Library) 6. Program design (HAL L ...

Catalogue of series articles Github open source address Write STM32F103C8T6 driver library from scratch (I) -- STM32CubeMX create and adjust engineering structure Write STM32F103C8T6 driver library from scratch (II) -- write system initialization program and configure clock tree Write STM32F103C8T6 driver library from scratch (III) -- write GP ...

STM32 - external interrupt configuration Overall diagram of external interrupt configuration: The steps are as follows: Configure RCC and turn on the clocks of the peripherals involved here. There is no way to work without turning on the clock peripherals.Configure GPIO and select our port as the input mode.Configure AFIO, select the GPI ...

FreeRTOS operating system preface Counting semaphores are called numerical semaphores. Binary semaphores are equivalent to queues with a length of 1, so counting semaphores are queues with a length greater than 1. Like binary semaphores, users do not need to care about what data is stored in the queue, but only whether the queue is empt ...

catalogue 1. Function introduction 2. Introduction to hardware wiring 2.1 DS18B20 temperature sensor 2.2 ESP8266 WIFI module 3. Case code 3.1 upper computer of QT design 3.2 node B DS18B20 code 3.3 coordinator-ESP8266 code 1. Function introduction This is a remote temperature alarm designed based on CC2530. The ambient temperature ...

SPI protocol introduction - learning notes 1. SPI Baidu Encyclopedia SPI is the abbreviation of Serial Peripheral Interface. It is a high-speed, full duplex and synchronous communication bus. It only occupies four wires on the pins of the chip, saving the pins of the chip. At the same time, it saves space and provides convenience for the layo ...

Platform: Code Composer Studio 10.3.1 MSP430F5529 LaunchPad™ Development Kit (MSP‑EXP430F5529LP) Hard knowledge USCI communication module Universal serial communication interface (usci) module supports multiple serial communication modes, and different usci modules support different communication modes. Each different usci module is n ...

Catalogue of series articles preface About the production of C# host computer software, I learned the blogger's code on the network and summarized and verified it after some actual combat. I set my own code style and introduced the idea of face object programming Development of C# host computer (I) -- basis of C# host computerDevelop ...