Programmer Group

Abstract: this blog introduces a method that STM32 uses a timer channel to control any IO to output the same PWM wave. The hardware platform used in this paper is STM32F407VET6. The codes of other types of platforms may be different, but the principles are general. Implementation principle: we all know that STM32 can directly output PWM wa ...

1, I2C bus communication protocol 1. Introduction to I2C bus I2C is the abbreviation of inter integrated circuit, which reads as I-squared-C. It was proposed by Philips in the 1980s and developed to allow motherboards, embedded systems or mobile phones to connect low-speed peripheral external devices. I2C bus is a bidirectional synchrono ...

Some problems about stm32 driving matrix keyboard and alternative methods of matrix keyboard About matrix keyboard For general buttons, I generally prefer interrupt mode to trigger. One is to save the resources of single chip microcomputer without having to scan it back and forth. Second, the interrupt is very efficient and easy to handle. Bu ...

1. Preface Previous: https://blog.csdn.net/ylc0919/article/details/111050124 It's been ten months since I said I would send the second generation framework. It's hard to have time to summarize the harvest during this period. After writing the first generation AT queue, I have many ideas. For example, can one AT queue manage multiple AT mod ...

Python Web Crawler (1) Getting Started Libraries used: requestspip+BeautifulSoup4pip+tqdmpip+html5lib python version: 3.8 Compilation environment: Jupyter Notebook (Anaconda3) Tour: Chrome Knowledge involved: HTML Hypertext Markup Language , What is a crawl 1. Web Crawler (Web Crawler or Web Spider) It is a program that aut ...

catalogue Test requirements: Experimental equipment: Experimental ideas: Experimental steps: Summary: Program source code: Test requirements: Collect 50hz AC through stm32ADC and display it through serial port Experimental equipment: Wildfire stm32MINI series with stm32f103RC chip Experimental ideas: Trigger ADC through Tim (time ...

STM32F103 - timer encoder mode and advanced timer output complementary PWM signals When STM32 is just used, the encoder speed is calculated by using the input capture interrupt to obtain the motor speed. After a period of learning, it is found that the motor speed is obtained by using the input capture interrupt. When the motor speed is not hi ...

The multi-byte reading of EEPROM under I2C bus is not difficult, basically a little change on the basis of one byte reading, so let's review the function of reading a single byte and see what he means at each step. The read data explained here are all optional reads under EEPROM24C02: The time series is as follows The timing analysis is as fo ...

         Because the single chip microcomputer can not directly drive the motor, it is necessary to add a motor drive module between them. The L298N motor drive module was used in the previous article. Now we recommend a new motor drive module. It is much easier to use than L298N, and it takes up a small ...

    in C language, Boolean bool variables are often used when operating data with only true and false states. If multiple states need to be observed at the same time, the operation efficiency of selection bits will be higher. 8 bits of a byte are used to represent 8 states respectively. It saves memory and is more efficient to process ...