I use STM32 to write a matrix keyboard program. I have posted several posts before, but I have never finished it.Circuit Diagram:Code:
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Hardware Connection:
LCD1602 is a common LCD display screen, which displays 16 characters × 2 lines, that is, it can only display 32 characters at most. The 1602 I have is driven by 5V . After bold te...
[i=s]This post was last edited by qwqwqw2088 on 2020-11-25 08:09[/i]In a battery-powered system, power consumption requirements, power supply voltage monitoring, and system reset circuit reliability p...
Improvements in 5G radio signal processing could save $193 million per U.S. fixed wireless access mmWave O-RAN networkMobile Experts study commissioned by AccelerComm shows enhanced LDPC IP can reduce...
In recent years, with the increasing development of new energy vehicles, the country has actively responded to the call of energy conservation and emission reduction, promoted the use of new energy...[Details]
Experimental principle
1. External expansion of program memory
Since C54x has no internal Flash or EEPROM, the program cannot be saved after power failure. When used offline, an external Boot ROM is...[Details]
Switching devices can be divided into analog switches, analog multiplexers, video matrix cross switches, data bus cross switches, AC solid-state switches, high-current low-power switches and spring...[Details]
1. Development of vehicle-mounted radar
With the rapid increase in the penetration rate of ADAS market, the market demand for millimeter-wave radar, a core component, has also entered a rapid ...[Details]
China Energy Storage Network News:
On April 24, the Beijing Power Exchange held a press conference on the power market transaction information for the first quarter of 2020 in Beijing. The pr...[Details]
In 2019, Texas Instruments' Luke Trowbridge published seven questions about digital isolators. Now this article has been updated with two additional relevant questions. Let's take a look at Luke Trow...[Details]
1. Introduction In recent years, with the continuous development of semiconductor technology, LED, as a new type of light source with low power supply voltage, low power consumption, long life and no...[Details]
At present, the application of single-chip microcomputers has penetrated into various fields, and the development of single-chip microcomputer technology has also changed with each passing day. As...[Details]
At present, the business model of terminal brands entrusting product processing and manufacturing to EMS companies is becoming more and more common. Compared with other fields, electronic products ha...[Details]
I have completed a stm32 project in the past two days. When solving the keystroke problem, I wrote a scanning function for an independent keystroke. It should have been done by predecessors. Its essen...[Details]
1. Installation of brush knob 1. Take out the spring and steel ball, put them in Vaseline oil, put the lubricated spring into the small hole of the brush knob, and stick the steel ball on the top of ...[Details]
The circuit is powered by a 4.5 volt battery and compared to a battery under test with an internal reference, which is set by R1, R2 and P1. For best results, the battery (DUT) should be loaded with ...[Details]
DSP system design and development process
When designing requirements specifications and determining design goals, two aspects of problems must be solved: signal processing and non-signal processin...[Details]
Powerful clock interrupts
In the design of single-chip microcomputer programs, setting a good clock interrupt will enable one CPU to play the role of two CPUs, greatly facilitate and simplify t...[Details]
Today, let us walk into the production workshop of CATL and see how this battery cell, which is being fought over by Volkswagen, BMW and Mercedes-Benz, is manufactured.
A battery cell is...[Details]