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Uboot adds custom commands: The commands in uboot are registered into the system using the macro declaration U_BOOT_CMD, and the link script will place all cmd_tbl_t structures in adjacent places. ...[Details]
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S3C2440A with ARM920T as the core is used as the main controller and Ethernet control chip DM9000AEP to design the hardware platform; build and transplant an embedded Linux operating system suitable ...[Details]
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Each I/O pulls 50mA current, sinks 100mA current, and has a total current of 800mA.
1. Power and ground processing
1. The analog power supply and digital power supply should be powered separately....[Details]
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At the 2019 Intel Innovation Accelerator AI Partner Summit held in Beijing, Intel and its partners launched the second phase of the "Intel AI100 Innovation Incentive Program" (hereinafter referred to...[Details]
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GDOT series insulating oil dielectric strength tester (insulating oil withstand voltage tester) of Guodian Xigao adopts industrial single chip microcomputer control, applies large-scale integrated ...[Details]
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The chip model is STM32F103CB (128K). A constant array is defined at address 801F000 in the project. When compiling, an error occurs: ER_IROM1: File exists ........ It is found that the chip model wa...[Details]
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introduction
The control of the environment in the vegetable greenhouse mainly involves measuring and controlling the ambient temperature, humidity, soil moisture, etc. In order to better meas...[Details]
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This paper introduces a simple method to realize multiple LED digital tube display by using a parallel port of 89C52 single-chip microcomputer. The hardware circuit structure schematic diagram and ...[Details]
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The NOP instruction can be seen in many programs in the microcontroller. Some people wonder what this empty instruction is used for. After many experiments, I finally confirmed that (who threw the to...[Details]
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On the morning of May 24, the first "14th Five-Year Plan" main network planning project undertaken by the Central China Institute - Gongyi City's "14th Five-Year Plan" main network development plan...[Details]
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The input of the switching power supply usually has a filter to reduce the ripple of the power supply fed back to the input. The input filter is generally composed of a capacitor and an inductor. Fig...[Details]
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Recently, the Shanxi Provincial People's Government issued the "Implementation Opinions on Accelerating the Establishment and Improvement of a Green, Low-Carbon, Circular Development Economic Syste...[Details]
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What is S-shaped acceleration and deceleration
As shown in the figure below, assuming that the device uses a stepper motor to move object X, the system requires object X to start from point A ...[Details]
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In October this year, Taiwan's policy of increasing both oil and electricity prices brought a significant impact on people's livelihood. People have used various methods to control electricity consum...[Details]
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From the previous uboot code analysis, we know that the uboot startup has three steps: BL0, BL1, and BL2. Since BL0 is a fixed program provided by the manufacturer, it does not need to be considere...[Details]