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Program design summary of the 12th Blue Bridge Cup single chip microcomputer provincial competition You can find the problem online by yourself, but you won't give it here. Here is a summary of the following points: General code 1, Remember the basic latch selection code void HC138_Init(unsigned char Yn) { switch(Yn) { ...

1, System clock 1. Clock tree 1. The system main frequency of mx6u is 528MHz, but by default, the internal boot rom will set the main frequency of I.MX6U to 396MHz 1. The system clock of mx6u-alpha development board comes from two parts: 32.768KHz crystal oscillator and 24MHz crystal oscillator. The 32.768KHz crystal oscillator is the RTC ...

catalogue Introduction to DS18B20 Structure diagram of DS18B20 temperature sensor: DS18B20 temperature sensor operation configuration: Introduction to single bus Single bus specification​ Single bus timing structure initialization: Send one bit: (master to slave) Receive a bit: (slave to host) Send a byte: Receive a byte: Code examp ...

FreeRtos learning notes (10) analysis of task switching principle Starting process of STM32 single chip microcomputer SP and PC registers are introduced in, STM32 single chip microcomputer bootloader literacy How to control the program jump from bootloader to APP by controlling SP and PC registers is mentioned in. RTOS task switch ...

FREERTOS learning notes III - message queue 1. Experimental contents Experiment 2: create two dynamic tasks. Task 1 controls the flashing of LED, and task 2 is used to detect keys. When the key KEY0 is pressed, task 1 is suspended; When key 1 is pressed, task 1 is cancelled and suspended. In Experiment 3, a message queue and two task process ...

Course design of Hangdian digital circuit -- taxi meter Experimental purpose (1) Learn the dynamic scanning method of nixie tube, be further familiar with the method of module call, and exercise the ability of programming and designing digital system. (2) Master the skills and methods of flexibly using Verilog HDL language for various descrip ...

Small experiment catalogue Raspberry pie science experiment 001 turn on the first LED 002 light up the LED lamp group 003_ Switch control LED light 004_ Obtain temperature and humidity 005_ Running lamp (ws2812b)) preface For unknown reasons, in a burst of smoke, my raspberry pie 4B motherboard and interface board were reimbursed. ...

PID algorithm type There are two forms of PID algorithm in engineering First define a structure typedef struct PID { float Proportion;//P float Integral; //I float Derivative;//D float PrevError;//Last error float LastError;//Last error float Error; //Current error float DError; float SumError; //Cumulative sum ...

This paper introduces how to use STM32F107VC(Waveshare Open107V experimental board) to realize high-precision pulse width meter (duty cycle). Development environment: IDE: STM32CubeIDE 1.8 Firmware library: stm32cube_ FW_ F1_ V1. eight point four Function generation: RIGOL DG5072 function signal generator generates 0-3.3V square wave, 10KHz ...

1. First attach code examples #include <AT89X52.H> #define uint unsigned int #define uchar unsigned char uint i,j; main(){ i=0; j=0; EA=1; //Interrupt master switch on ET0=1;//Timer T0 interrupt allowed ET1=1;//Timer T1 interrupt allowed TR0=1;// Start timer T0 TR1=1;// Start timer T1 TMOD=0x11;//Mode 1 of timer T0 mode 1 o ...