Programmer Group

prefaceAfter making so many sensors, I played by myself. This time, my family couldn't watch it. I had to have an ultraviolet sensor. Before I went out, I looked at the ultraviolet intensity (solemnly declare: I'm not a single dog!!! (, ◡✧) I saw that there were really suitable modules on the Internet, so I finished one. This time we will make ...

This paper introduces the RT thread real-time operating system running on hummingbird processor and the development of ESP8266 wifi module. Transplantation of RT thread is provided in the supporting sdk of hummingbird https://github.com/riscv-mcu/hbird-sdk/tree/0.1.2/application/rtthread/msh , we only need to carry out specific application dev ...

Some understanding of compiled code ARM Cortex-M underlying technology -- principle and application of compiling kernel Reference website: https://www.cnblogs.com/39950436-myqq/p/11545140.html 1. Definition of compilation link No matter how simple the code we write, we must go through the process of "compiling -- > linking" to g ...

1. Python code and C code character association This section describes how Python characters are associated with C characters (such as module name, class name, variable name, function name, etc.) during module expansion? Take the ADC class name symbol as an example to illustrate the following association process: C code character ADC STATI ...

In the field of Web technology, canvas is a widely used function, which can support developers to expand the vector graphics rendering ability in addition to the original HTML ability. It is often used to realize vector animation, particle special effects, charts, games and so on. Canvas is just a canvas in HTML. It doesn't have drawing abili ...

The previous two articles (Register Configuration Lighting LED and Device Tree Lighting LED) are essentially register configurations to control the lighting of LEDs. The direct operation of registers is to write the register information related to the LED directly into the driver code of the LED, which is also a more general control method. Ho ...

brief introduction Due to the limited platform resources and various hardware platforms, it is necessary to shield the different hardware architectures, platform resources and operation forms, and provide a unified system service development framework. According to different hardware platforms of RISC-V, Cortex-M and Cortex-A, there are tw ...

1. Write in front spi (Serial Peripheral Interface) is the Serial Peripheral Interface. Like i2c, spi also uses the bus for peripheral device communication, which is essential for embedded development. According to my previous experience, I summarize spi (mainly in the field of MCU, and Linux has mature driver equipment). The main purposes an ...

This article uses Italian Semiconductor (ST): STM32F103C8T6 Core Version: ARM Cortex-M3, if not this chip, please refer to the schematic of the chip you are using. Picture from Walnut Electronics Pin Definition In the pin definition of STM32F103C8T6, PA11 corresponds to CAN_RX PA12 corresponds to CAN_TX STM32 CAN Bus Schematic Di ...

Infrared remote control protocol Wireless contactless control technology At present, PWM (pulse width modulation) of NEC Protocol and PPM (pulse position modulation) of Philips RC-5 Protocol are widely used in the coding of infrared remote control characteristic Anti interference ability, reliable signal transmission, low power consumpti ...