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Samsung has previously released version push of OneUI 4.0 (Android 12) to models such as Samsung Galaxy S21, Flip 3 and Fold 3, but current information indicates that the company is already dev...[Details]
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With the development of science and technology, embedded systems have become the main field of technological development. Linus and Wince are relatively common embedded systems. The embedded develo...[Details]
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CO2
lasers have a relatively high photoelectric efficiency, do not cause damage to the working medium, and emit invisible lasers with a wavelength of 10.6μm. They are an ideal laser. Accordin...[Details]
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In an SMPS, the circuit clamps the input AC voltage to a safe level at which the power MOSFET operates.
Most isolated, offline SMPS (switching power supplies), including flyback, forward and reso...[Details]
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There was news that Nintendo will launch two new Switches, one of which is the Lite, and the other with enhanced battery life does not seem to meet the definition of "upgraded version" for enthusiast...[Details]
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According to news on December 18, Tesla’s long-awaited 3D bird’s-eye view parking assist system has finally arrived. This feature called “High-Precision Parking Assist” is not a bird’s-eye view in th...[Details]
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The new generation of information technology is accelerating its integration with traditional industries, driving the digital transformation of global industrial automation. The Industrial Internet...[Details]
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Used to measure DC resistance. The figure shows the principle wiring for measuring high resistance (above megaohms), low resistance (below 10 ohms), and medium resistance (10 ohms to megaohms). In th...[Details]
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After connecting the product sample to STM8S-DISCOVERY and starting full-speed operation, two error prompt boxes popped up one after another: First: Error:swim error : comm timeout After clicking O...[Details]
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Building security systems are used in many system topologies, from simple alarm systems to complex sensor networks, all reporting to a master security panel that serves as a hub. Depending on their d...[Details]
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Musk, the owner of Tesla, the world's most valuable automaker, has criticized LiDAR, a key technology for autonomous driving, more than once, using harsh words: “LiDAR is for fools.” "Whoever use...[Details]
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When reading kernel source code, you often encounter IS_ERR, such as in linux/arch/arm/kernel/sys_arm.c
view plain copy
print ?
asmlinkage int sys_execve(char __user *filenam...[Details]
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Abstract: When a short circuit occurs at the output of a hot-swap control circuit, the internal circuit breaker function is triggered and the circuit is disconnected. However, the initial short-circui...[Details]
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1. Two easily confused concepts: power supply and power converter The original definition of power supply is: a device that converts other forms of energy into electrical energy is calle...[Details]
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Since Uboot2011.06 has good support for S3C6410, we use Uboot2011.06.
1. Porting environment
Host: VMWare-ubuntu
Development board: ok6410—512M nandflash, Kernel: 2.6.30.4
u-boot: u...[Details]