Recently, I am considering handing over part of the program to someone else, but I don't want them to see the source code. So I remembered that KEIL could generate lib files in the past. Now the compi...
For every circuit designer, power supply is basically a problem that will be encountered 100%, especially in designs that are mainly embedded. For many weak current designers, the knowledge of power e...
The figure shows the related voltage pulse experiment. It can be seen that in the 12V system, the highest US reaches -150V. So when we choose the input filter capacitor, should we choose the one with ...
LPWA currently includes a variety of technologies, such as LoRa, Sigfox, Weightless and NB-IoT, among which LoRa has entered China since 2013. It is expected that the shipment volume of Semtech's SX12...
Since udelay is an infinite loop, will the processor interrupt interrupt the udelay function to handle the interrupt, and then handle the high-priority task after the interrupt exits?...
The Christmas shopping in the United States usually starts after Thanksgiving (the fourth Thursday of November every year). On the second day of Thanksgiving, shopping malls in the United States will...[Details]
During the 2020 China Mobile Global Partner Conference, news leaked that China Mobile, China Unicom, and China Telecom, the three major operators, may jointly announce the commercial use of 5G messag...[Details]
P3 is a multi-function port. Compared with the structure of P1, it is not difficult to see that the difference between P3 and P2 is that there is an additional NAND gate and buffer. It is these two p...[Details]
An investor asked Joyoung Co., Ltd. on the interactive platform: Does the company have the intention to cooperate deeply with Huawei? Joyoung Co., Ltd. stated that some of the company's products have...[Details]
With the gradual development of social economy and the rise of automobile manufacturing industry, the number of cars in my country has increased significantly. However, urban roads cannot be expand...[Details]
1. The network card device used on my mini2440 development board is Mercury MERCURY54M wireless USB network card MW54U ver:7.0, and its internal chip model is ATHEROS's ar9271. There is no driver f...[Details]
1. AVR microcontrollers use RISC architecture, while 8051 microcontrollers use CISC architecture. The former is 2 to 4 times faster than the latter, and is a pipeline operation instruction. 2. AVR m...[Details]
basic introduction Recently, I made a device based on 51 MCU (STC89C52) + DHT11 temperature and humidity module + ESP8266 module + upload to oneNET APP display + LCD1602 display. The 51 MCU collects ...[Details]
Introduction As a new light source, LED has the advantages of high light efficiency, long life, easy dimming, small size, and green environmental protection. It is called the fourth generation o...[Details]
Ⅰ. Write in front The stability of STM8S is not as good as that of STM32, especially when the power consumption is low. When using EXTI external interrupt to wake up, it is easy to be woken up by i...[Details]
Regarding the current debate on autonomous driving routes, in addition to the long-term opposition between the pure visual faction and the lidar visual fusion faction, there is also an ongoing debate...[Details]
The N4906B serial error tester covers basic error test functions. With appropriate pricing and excellent configuration features, this new serial error tester is an ideal choice for manufacturers and ...[Details]
Apple’s top chip executive revealed the company has begun making its own cellular modems for future devices, a move that will replace Qualcomm’s components, Bloomberg reported on December 11. Johny...[Details]
1. Apache transplantation
Download apache_1.3.36.tar.gz from http://www.apache.org/ and unzip it into a directory.
Use local gcc to compile this version. I used arm-linux-gcc4.4.3 on Fedo...[Details]
Automotive relays are an important electronic component, commonly used for switch control in automotive circuits, such as lights, horns, electric windows, etc. This article will introduce the princ...[Details]
Programming Basics
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