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In the Linux driver, various devices that cannot be classified are defined as miscellaneous devices (expressed by the miscdevice structure). The miscdevices share a major device number MISC_MAJOR (...[Details]
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1. Parameter setting analysis
(1) open: soc_pcm_open calls the open or startup functions of cpu_dai, dma, codec_dai, and machine in sequence.
Only add parameter-related code in the ope...[Details]
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Introduction: For many novices, they don’t know how to get started with ARM embedded systems? How to learn step by step? This article will introduce the steps to learn ARM embedded systems, I hope it...[Details]
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introduction
Usually, there are two groups of power supplies for household fixed-frequency air conditioner controllers. One group is 12 volts with a current of less than 600 mA; the other ...[Details]
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Safe obstacle avoidance is a basic issue in mobile robot research. Obtaining the distance between obstacles and robots is the prerequisite for studying safe obstacle avoidance. Ultrasonic sensors ar...[Details]
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Core Technology News (Text/Xika), LG Electronics' spring flagship LG G8 ThinQ, the first impression of the body design is like a smooth pebble, the front touch button has disappeared, the back camera...[Details]
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Compared with traditional mechanical buttons, capacitive touch sensing buttons are beautiful, durable and have a long life. Capacitive touch sensing buttons are actually just a small "copper pad" on t...[Details]
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LED digital tube dynamic scanning display digital (C language)
#include
sbit P00 = P0 ^ 0;
sbit P01 = P0 ^ 1;
sbit P02 = P0 ^ 2;
sbit P03 = P0 ^ 3;
int DATA_LED =
{
//0~9 digital...[Details]
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p IC microcontroller TIMER0 controls the running water lamp #include pic.h __CONFIG(0x3B31); unsigned char num=0,i=0; void init() { TRISB=0x00; TRISC=0x00; PORTB=0xFE; PORT...[Details]
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O Introduction
With the progress of science and technology and the development of social economy, it has become an inevitable trend for electronic password locks to replace traditional mech...[Details]
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What should I pay attention to when using P0 port as a general I/O port to output data?
Answer: P0 port is different from other ports. Its output stage has no pull-up resistor. When it is used as a...[Details]
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Installation environment of voltage stabilized power supply
The voltage stabilizer should be used in a well-ventilated and dry place indoors. The use conditions are relatively strict. The installat...[Details]
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Zuolan Microelectronics debuts at the International Electronics Show: Domestic RF filters demonstrate technical strength The development of 5G and the Internet of Things has led to a continuous inc...[Details]
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With the continuous development of industry, linear motor modules and linear modules, as important transmission components, have gradually entered the precision industry and are widely used. Many p...[Details]
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A friend of mine wanted to test the noise figure of a low noise amplifier (LNA), but he encountered some troubles. The Y-factor method is very simple to test the noise figure of LNA. After calibratio...[Details]
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