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1. Moving the interrupt vector table during Linux ARMv7 startup 1. Migration of interrupt vector table and interrupt handling code After the kernel assembly stage, the interrupt vector table is moved...[Details]

ADAS is the abbreviation of Advanced Driver Assistance System. Simply put, it makes active judgments and preventive measures before the driver's subjective reaction in an emergency to achieve the r...[Details]

1. System Overview The modules used in the system include AT89C51 microcontroller + LCD1602 display screen + Hall speed measurement module. This design uses the 51 microcontroller as the core control...[Details]

On January 13, 2016, the "2016 Power Plant Design and Equipment Selection Seminar" jointly organized by Guangdong Media-PV Men, Northwest Survey and Design Institute, etc. was grandly held in the a...[Details]

There is such a problem: －－－－－－－－－－－－－－－－－－－－－－－－－－－－－ It is known that before the program is executed, A = 02H, SP = 52H, (51H) = FFH, (52H) = FFH. Perform the following procedure:     POP DPH ...[Details]

Design 　　There are two points to note when using AT89C52 to read and write SD cards. First, you need to find a solution to achieve communication between the AT89C52 microcontroller and the SD card. S...[Details]

However, the cost of these devices increases rapidly if the temperature of multiple test points on the board needs to be measured. This in turn creates an urgent need for efficient, compact and low-co...[Details]

At present in China, fingerprint recognition has a long history and a relatively fast development speed. After years of market promotion and application, there are relatively mature products in acc...[Details]

Taking the Sinyuan SXY983 air-conditioning intelligent universal board as an example, a simple, intuitive and practical simulation operation table (board) was made. 　　1. Appearance (see the figure ...[Details]

The ATmega48 can be driven by an external clock source by connecting it as shown in Figure 15. At this time, the CKSEL fuse bit must be programmed according to Table 15. After selecting this osci...[Details]

The charger introduced here can charge nickel-cadmium batteries or ordinary zinc-manganese dry batteries with constant current and constant voltage. The number of batteries charged each time can be...[Details]

High voltage switching power supply design Aiming at the high voltage, low current and low power power supply system required by precision electronic equipment, a high voltage switching power ...[Details]

The LCD screen is JM12864 or FYD12864 (with font library). I have no problem using these two types of screens. 4 rows * 8 columns of Chinese characters = 32 serial communication interfaces P1.5--P1.7...[Details]

LPCAMM2 memory modules help notebook computers achieve faster speeds, smaller sizes, and longer battery life with higher performance, lower power consumption, and smaller form factors, and facilitate...[Details]

Since the beginning of this year, state-owned central enterprises have continued to increase their layout in strategic emerging industries. A reporter from China Securities Journal recently visited th...[Details]