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Arm linux system call analysis
Overview
The operating system provides a set of interfaces for processes running in user mode to interact with hardware devices and provide system services of the oper...[Details]
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start.S source code: .globl _start _start: // Hardware related settings //Peri port setup ldr r0, =0x70000000 orr r0, r0, #0x13 mcr p15,0,r0,c15,c2,4 @ 256M(0x70000000-0x7fffffff) ...[Details]
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It turns out that in the 8051 architecture, the interrupt system contains two non-addressable "priority effective" triggers. One is used to indicate whether the CPU is executing a high-priority inter...[Details]
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Abstract: A new pulse pressure simulator based on LabView is proposed, and its design concept, system hardware and software composition and application are introduced.
Hypertension is the...[Details]
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OnePlus Technology CEO Liu Zuohu released a pre-heating video of OnePlus 7 on Weibo, with the words "Fast and Smooth" attached. He also emphasized that this is the smoothest OnePlus phone he h...[Details]
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The main characteristic of a quasi-resonant (QR) switch-mode power supply (SMPS) is the frequency variation as the input voltage changes.
For a flyback power supply, the power delivered at its outpu...[Details]
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There is definitely some discrepancy between the data obtained by testing a single LED white light on an aging board and the data obtained by testing the LED white lights when they are assembled in...[Details]
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Electric motors are commonly called motors, and they are found in many devices. This article will introduce asynchronous motors, torque motors, and the differences between torque motors and asynchr...[Details]
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A new smartwatch has recently been certified by the Bluetooth SIG. The watch is released under the Huawei brand, but the model number is different from the one we already know. The watch has the mo...[Details]
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Capacitor model nomenclature
Table 6
Capacitor model nomenclature
Part II:
Material
Part III:
Features and classification
...[Details]
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The leakage problem of solar panels can traditionally be solved by using a Schottky diode in series with the solar panel, but the forward voltage drop of the Schottky diode causes it to consume ...[Details]
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Motor is a device that converts electrical energy into mechanical energy. It uses an energized coil (that is, stator winding) to generate a rotating magnetic field and acts on the rotor (such as a ...[Details]
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The U.S. National Counterintelligence and Security Center (NCSC) recently released a report pointing out that given the unique opportunities and challenges brought by emerging technologies, artificia...[Details]
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1 Introduction
The current situation of warehouse management in China is not optimistic. Most warehouses are still in the relatively primitive manual management stage. A lot of manpower co...[Details]
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Developers are now faced with unprecedented challenges, needing to design complex software for a variety of products, often using different processors. NXP's MCUXpresso Developer Experi...[Details]