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To understand smart home, users must know one thing, which is the classification of smart home. Most friends know that there are smart home systems and smart home products, but there is also a cate...[Details]
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On July 29, ZTE announced that it had raised RMB 11.512 billion through a non-public offering of ordinary shares. As of December 31, 2019, before the raised funds were actually in place, the company ...[Details]
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A notable feature of dynamic memory is that the stored data is volatile and must be refreshed within a specified time. In this system, the 8031 timer 1 timer interrupt is used to refresh the DRAM...[Details]
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It’s hard to ignore the fact that mobile phone charging speeds have become a little crazy in the past few months. From 30W to 40W two years ago, to 65 to 120W now. In theory, if you have a phone that...[Details]
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According to data from the National Health Commission, the overall myopia rate among children and adolescents in my country was 52.7% in 2020, ranking first in the world. Most children's myopia is ...[Details]
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Here we record the process of the Linux kernel doing secondary memory mapping, taking the mapping process of the interrupt vector table as an example.
In the S3C6410 architecture, Linux uses a coarse...[Details]
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Toyota's "brake door", Takata's "airbag door"... There are countless cases where traditional cars have been recalled on a large scale due to quality problems, and even some parts companies have gone ...[Details]
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1. Self-locking and interlocking circuits
1) Self-locking circuit
Self-locking circuits are often used for start-stop control of electric motors.
Press the start button X0 and ...[Details]
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Recently, Tianma's 8.6th generation new display panel production line project with a total investment of 33 billion yuan entered the implementation stage. The content of this investment and construc...[Details]
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LED display screen is also called electronic display screen. It controls the display mode of semiconductor light emitting diodes. It is roughly composed of many red light emitting diodes, which dis...[Details]
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leds_drv.h
#ifndef _MEMDEV_H_
#define _MEMDEV_H_
#include linux/ioctl.h
/* Define magic number */
#define MEMDEV_IOC_MAGIC 'k'
...[Details]
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Images in science fiction movies often break through the limits of reality, such as in the movie "Minority Report." Tom Cruise uses a multi-touch screen to browse information. Capacitive sensing te...[Details]
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It is reported that the large-scale UV 3D direct writing lithography equipment iGrapher3000 has rolled off the production line at Soochow University WeiGe Technology Group and put into industrial ope...[Details]
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Download address: https://pan.baidu.com/s/1-oGcJ0p-iV4WZ9d6lL0KaA Extraction code: 7v35 Espressif4_4_1 streamlined portable: https://download.csdn.net/download/qq_29246181/86399639 VSCode1.61_Embed...[Details]
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With the miniaturization of electronic devices, the power supply of compact electronic devices is a very important issue. At present, DC-DC converters are widely used in battery-powered devices an...[Details]
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