In the code, I see three constants: CRC16_POLY, CRC16_INIT_REM and CRC16_FINAL_XOR. I don't know what they are used for. In some functions that calculate CRC, they are passed as parameters. crc16 = cr...
The schematics and PCBs of the two boards are similar. If an interrupt occurs on one of them, the serial port data will be wrong, and 81 will become e0 or 00 e0. I don't know if any of my friends have...
[i=s]This post was last edited by dcexpert on 2019-5-15 21:11[/i] There are two red LEDs in front of McQueen, which are controlled by P8 and P12 respectively. First, use MakeCode to write a small prog...
#include stdio.h int main() { char *p="abcdef"; //Many books say: p is on the stack, "abcdef" is in the data area p[2]='W'; printf(p); getchar(); return 0; } This program compiles, but what program wi...
I use arm9 2440 and made a program with evc. Now I want to achieve: 1. Touch screen calibration 2. Set the backlight time of the touch screen 3. Capture the touch screen backlight off (do some operati...
I made three download cables according to the circuit of a purchased download cable. The first one (50cm) can download, but the write speed needs to be lowered to below 60. However, this cable cannot ...
1. Introduction
RFID (radio frequency identification) is a non-contact automatic identification technology that emerged in the 1990s. It uses the characteristics of radio frequency signal prop...[Details]
1 Introduction
A wide variety of communication cables and control cables are widely used in various instruments and control equipment. Whether the cable is well-conducted and
whether
th...[Details]
When the WDP500-2A plane grating monochromator is used to test the emission wavelength of a high-power laser diode at different currents, the matching of the laser diode has the disadvantages of lo...[Details]
As LEDs continue to improve in almost every aspect of performance and cost, LED lighting is being used in an increasingly wide range of applications, among which LED street lights are a focus of in...[Details]
When choosing a laptop battery, you should consider several factors, such as power, appearance, and quality.
Regarding power, we often see that a manufacturer uses values such as the number ...[Details]
Electronic systems are located at different points on the automotive power bus and therefore often need to operate under very stringent power requirements. These include load dump, cold crank, very lo...[Details]
From the PIC16F946 datasheet, we know that there are two ways to write values to the LCD for display:
1. Directly write the value to LCDDATA1~LCDDATA23
2. Use disconnect t...[Details]
1 Introduction
Building Automation System (BAS) is a distributed monitoring system (DCS) designed according to distributed information and control theory. It is the result of the mutual de...[Details]
1 Introduction
With the development of control, computer, communication, network technology, etc., a new control technology, namely fieldbus, has emerged in the field of industrial control...[Details]
1. Introduction
Testing the temperature of steel billets before rolling is an important measure to ensure the quality of steel. Traditional manual testing is difficult to ensure product qu...[Details]
MediaTek (2454) announced the acquisition of F-MStar (3697) and attracted the attention of IC design industry. This morning, Gartner Semiconductor Industry Research Director Hong Cenwei analyzed ...[Details]
0 Introduction
With the rise and continuous improvement of the solid-state lighting industry, light-emitting diodes (LEDs) have become an alternative lighting technology and are gr...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
Motors are important products that convert electrical energy into mechanical energy to achieve automation, and they are widely used in industrial control, medical electronics, white a...[Details]
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