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From stext in arch/arm/kernel/head.S to kernel rest_init system_state = SYSTEM_SCHEDULING; Analyze the entire memory startup process As for why it does not analyze the start in arch/arm/boot/compre...[Details]
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On the afternoon of February 7, the People's Government of Pingshan District signed a strategic cooperation agreement with Shenzhen Yaoshi Lithium Battery Technology Co., Ltd. and Shenzhen Kunpeng Equ...[Details]
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Recently, a well-known research organization released a latest report stating that Huawei's self-developed Hongmeng operating system will achieve a 2% market share worldwide in 2020, surpassing the c...[Details]
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The main components of an electron spectrometer
Electron spectrometers usually consist of an excitation source (X-ray gun and electron gun), an ion gun, a sample chamber, an electron energy analyzer,...[Details]
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1 Introduction
Under the current situation of power shortage in my country, it is very important to monitor power to ensure safe use of power. The research and transformation of power grid...[Details]
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Friends who have used the stc12C5A60S2 microcontroller know that the microcontroller has two serial ports available. There are also many program comments on the official website, so I wrote a program...[Details]
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I'm learning embedded low-level system development recently. When writing startup code, I need to set the SP of each mode and adjust the working mode of the CPU. Some of the code is as follows:
...[Details]
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Redirection problem in MDK, various tutorials. Actually it is similar in IAR, I copied the code from the tutorial of Wildfire. (1) A macro (_DLIB_FILE_DESCRIPTOR) needs to be added in IAR. (2) Rede...[Details]
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Network analyzers can be used to characterize radio frequency (RF) devices. Although originally designed to measure S parameters, network analyzers are now highly integrated and advanced in order to ...[Details]
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0 Preface
In recent years, switching power supplies have developed rapidly due to their advantages of high efficiency, small size, and good output stability. However, due to the high frequency, hi...[Details]
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Nowadays, all walks of life are competing for the young consumer market. Among them, the most eye-catching is the beauty instrument industry. The appearance economy has stimulated the nerve endings o...[Details]
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In a large software project, there may be multiple files that contain a header file. When these files are compiled and linked into an executable file,
, there will be a lot of "redefinition" errors...[Details]
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Compared with traditional analog monitoring systems, digital video monitoring systems have many advantages:
1) Save the surveillance video on a large-capacity hard disk. The digital signal sto...[Details]
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1. First, let’s take a look at the schematic diagram of the core board We found that there are only 8 data lines, but no address signal, so the 8 lines can transmit data and addresses. And the add...[Details]
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The last line after startup prompts can't access tty, job control turned off, which means that the console cannot be entered. The reason is that there is a problem in the /etc/inittab file
Sol...[Details]
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