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...
[size=4] With the development of the Internet of Things (IoT), wearable and portable devices, consumers are beginning to get tired of messy cables and batteries that need to be charged frequently. The...
On August 23rd, Geely's subsidiary, Jiyao Tongxing, announced it has the industry's largest advanced production capacity for tandao
batteries
, with eight production bases across China. Jiy...[Details]
Reflow soldering is a critical process in electronics assembly production, and the cleanliness of the reflow oven has a direct impact on product quality. Dust and residue accumulation within the ov...[Details]
When you are happily watching NBA or football, your wife asks you to turn off the lights in the bedroom. Would you be depressed? Of course, unless you are not afraid of your wife.
Now you are ...[Details]
What is "Car Electronic Fence"
Fleet managers can define a graphical area (regular or irregular) or divide it into administrative zones in Yamei Technology's vehicle backend management system ...[Details]
Recently, Tesla released the "Tesla Car Voice Assistant Terms of Use", announcing that the car voice assistant will be connected to the Doubao large model (Skylark large model) and DeepSeek Chat pr...[Details]
Spark plugs are an indispensable device for engines. As the saying goes, without spark plugs, the engine cannot work properly. The serious consequence is that when driving at high speeds, the engin...[Details]
Before understanding single-phase control transformers, let's briefly understand what a single-phase transformer is. A single-phase transformer uses a single-phase input. Compared to a three-phase ...[Details]
Inverter power supplies on the market can generally be divided into two categories: sine wave inverters and square wave inverters. Some engineers also like to categorize pure sine wave inverters as...[Details]
The second-generation Snapdragon W5+ and second-generation Snapdragon W5 platforms support users sending and receiving messages via satellite when there is no cellular and Wi-Fi coverage.
...[Details]
The fracture mechanism is stress concentration, which typically occurs at the capacitor lead pins or pad connection points, as shown in the figure. Under vibration, the capacitor lead pins and pad ...[Details]
Batteries are a core component of new energy vehicles, accounting for over 40% of the total cost. This is also the area where automakers are most willing to tamper with costs. Since 2021, domestic ...[Details]
Blackfin® 16-/32-bit embedded processors offer high performance, low power consumption, flexible software features, and scalability, making them suitable for converged applications such as multi-fo...[Details]
For the average person, an electricity meter is a monthly bill. For beginners, it's a collection of components and parts. For experienced meter engineers, however, it's a complex and complex proces...[Details]
The motor is a very important component for new energy vehicles. In terms of vehicle power, pure electric vehicles use electric motors instead of traditional diesel/gasoline engines. For electric v...[Details]
01 Overview
The HJM315A/B is a domestically produced programmable three-phase motor driver specifically designed for small and medium-sized motor gyroscopes. It consists of an MCU, LDO, three-...[Details]
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