I. Brief description of frequency characteristics (1) Since there is a reactive element C in the amplifier circuit , it presents different impedances for different frequencies, so the amplifier circu...
Today, when I was using HPM6750EVKMINI, the download prompt "Unable to connect to localhost:3333" appeared. The download of the example program that worked well before also had this prompt.After the d...
[i=s]This post was last edited by Jacktang on 2019-6-25 21:05[/i]Engineers who choose to design a wireless IoT application from scratch will quickly realize that the task is difficult. First, building...
[i=s]This post was last edited by Xu Huiqing on 2021-12-9 22:32[/i]Today, I received a module called Erha Image Recognition Artificial Intelligence Visual Sensor, which I applied for a trial on the fo...
MINI2440 has a DM9000 network card. The driver for this part is actually quite complicated, but u-boot supports it well. We only need to modify a small amount of code when porting. This part of the c...[Details]
As usual, on the first day of work in 2018, the bosses of companies will give a New Year's speech to encourage their employees. The ways of speaking vary, some look forward to the New Year, some im...[Details]
What is OLED burn-in, burn-in or image retention? It refers to the phenomenon that frequent and continuous playback of images on a TV leaves permanent marks on the panel, which is obviously not suita...[Details]
0 Introduction
With the development of science and technology, electronic technology is also developing rapidly. This design is to make a multifunctional digital clock, which has the functions ...[Details]
Functions: hourly time announcement, hour, minute and second adjustment, alarm setting, alarm switch, perpetual calendar and its adjustment, leap year
Judgment, stopwatch, chip: AT89S52, HD7279A
...[Details]
The technologies used to measure heart rate in a non-contact, non-invasive manner are divided into five categories: (1) LED, (2) image processing, (3) acceleration sensor, (4) electromagnetic wav...[Details]
According to foreign media appleinsider, Apple is studying how to make the battery of the Apple Watch move to provide tactile feedback to the wearer. Apple recently published a patent for a "port...[Details]
On June 26, the largest mobile industry event in Asia, MWC Shanghai 2019, officially kicked off. 2019 is the first year of global 5G commercialization. At this year's conference, 5G has undoubtedly b...[Details]
According to Gizchina, the production of Xiaomi Mi Band 7 has begun, and the company is preparing to launch a new generation of branded fitness bands. Earlier reports said that Xiaomi Mi Band 7...[Details]
Most circuits are ground referenced, and lower voltage components can monitor the low side of the load, but not the high side. For example, almost any low voltage rail-to-rail input op amp can sens...[Details]
Xu Bingyin, dean of the Smart Grid Research Institute of Shandong University of Technology and doctoral supervisor, has long been committed to the research of distribution network relay protection ...[Details]
In C51, the alarm when interrupt and non-interrupt functions call the same function is RECURSIVE CALL TO FUNCTION. The standard C language dynamically generates local variable space in the stack, s...[Details]
First, in the previous example, add the dma.c file to the dev folder, and then add it to the Makefile in that directory:
This is the framework. Next, open dma.c to implement it:
...[Details]
Analogue and Mixed Signal
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