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Following the last article, the author introduces a simpler parsing tool, sscanf. warm-up When you are in C language class and doing c language course design or experiment, you should often contact printf and scanf. The former prints characters to standard output, while the latter reads and parses strings from standard input. sscanf is simil ...

MISC means mixed and miscellaneous, so MISC driver is also called miscellaneous driver, that is, when we have a driver on the board When some peripherals cannot be classified, MISC driver can be used. MISC driver is actually the simplest character device driver. It is usually nested in platform bus driver to realize complex driver 1, Int ...

First met LoRa In short, LoRa is a low-power remote wireless communication technology. It is a wireless data transmission module developed based on SX1276/1278 chip of Semtech company. This chip has small integration scale and high efficiency, so that LoRa module has high receiving sensitivity. So what are its advantages over our commonly ...

4.11 LCD1602 display screen 4.11.1 introduction to schematic diagram Figure 4-11-1 Figure 4-11-2 According to the schematic diagram: The data pin of LCD1602 is connected to port P0. RD(RS) pin is connected to P2 six WR(RW) pin is connected to P2 five LCDE(E) pin is connected to P2 seven 4.11.2 introduction to LCD1602 character scre ...

preface Today, let's learn the gyroscope mpu6050, and use the DMP Library of mpu6050 to read the three-axis angle and acceleration. What is the DMP library, that is, the built-in digital motion processing (DMP) engine can reduce the load of MCU complex fusion calculus data, sensor synchronization, attitude and potential sensing, etc. I ...

Equipment to be prepared:   Raspberry pie 4B (here I choose the 8G memory version) Keyboard and mouse (there must be a keyboard, and the mouse can be used after Ubuntu Mate is installed) Monitor (HDMI screen is recommended here, I use https://www.waveshare.net/wiki/7inch_HDMI_LCD_(C) (screen below) 16G/32G SD card (32G is recommended because ...

STM32 library function development series article directory Part I: program design and implementation of STM32F103ZET6 single chip microcomputer dual serial port mutual transmission Part II: the simplest DIY Bluetooth smart car design scheme based on STM32 single chip microcomputer preface The simplest original core technology of t ...

Stm32 cubemax (IX) -- Ultrasonic Ranging Using acquisition interrupt preface Because we want to realize Kalman filter, we first write about ultrasound this time and review the input acquisition interrupt by the way. 1, Principle of ultrasonic module Anyone who has searched the ultrasonic module on the Internet is no stranger to this ...

effect As shown in the figure: technological process User login - > function selection - > corresponding function thinking For the use of the whole software, the acquisition of touch screen coordinate points is indispensable, so we open a separate thread to obtain touch screen coordinate points and run from beginning to end ...

Task scheduling switchThe following codes are in /oneos-kernel/source/os_sched.cInitialization of scheduling:k_ sched_ init->_ k_ readq_ bmap_ Init: the priority bitmap is 0 and the priority linked list array is initialized here.Start kernel scheduling:k_start->os_first_task_start-Turn off task scheduling:void os_schedule_lock(void) { ...