: I ported mplayer yesterday, but it can't play videos. It plays MP3 very smoothly. The error message is as follows: /qt/MP/MPlayer-1.0pre8 # ./mplayer panda.mpg MPlayer 1.0pre8-4.1.2 (C) 2000-2006 MP...
My project is a dialog-based interface. I drew several lines in Onpaint(). When I use the keyboard to control it, the lines will flash every time I press a key. How can I make the lines always stay th...
[font=微软雅黑][size=3][color=#000000]A certain vehicle-mounted electronic device needs to pass the vehicle standard CISRP25 LEVE3 test. The conduction current method exceeds the standard, and the 31MHZ f...
Here I use lm75AAs a temperature acquisition chip, I2CControl. Display the temperature on OLED . First design the system ports and LM75ATo connect, here we select I2CInterfaces PB2 and PB3 are used as...
My development environment is evc4.0+sp4+sdk, but when I compile an existing project, it always reports fatal error LNK1104: cannot open file 'libeay32.lib', but this project can be compiled on the ma...
1. Time flies so fast, two weeks have passed in a blink of an eye. This year's May Day is very special. The lockdown continues, haha. I hope it will be lifted soon.2. After I2C was able to read the ul...
Emergency hand-held lamps powered by 6V maintenance-free batteries are widely used in rural areas. The charger used is a transformer step-down and single diode half-wave rectifier, and the charging...[Details]
Traditional broadcasting systems generally need to be operated manually at a fixed time, and can only realize one-way broadcasting with few functions. Traditional bell ringing equipment has a singl...[Details]
introduction
1 The significance of using RTOS on MSP430
It is understandable that it is meaningless to use RTOS on MSP430. Because the hardware resources of MSP430 are limited (for exampl...[Details]
Microchip's PIC18F46J50 is a low-power, high-performance 8-bit USB microcontroller (MCU) using nanoWatt XLP technology. The current in deep sleep mode can be as low as 13nA, the operating voltage i...[Details]
1. Circuit composition
The whole circuit consists of two parts:
1. Power saving control circuit
As shown in the figure below. Including delay circuit and drive circuit.
(1) Delay ci...[Details]
Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
1. Introduction
With the growth of parking demand, the scale of parking lots is becoming larger and larger. A lot of research has been done on intelligent parking lots in China, but most of th...[Details]
introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[Details]
Converged processors meet scalability requirements
In current embedded system design, solutions based on MCU, DSP, FPGA and ASIC account for more than 90% of the market share. These solutions ...[Details]
Abstract: In order to generate a stable excitation signal, the design of a digital frequency synthesizer is implemented on FPGA using Verilog hardware language. The design includes accumulator, wav...[Details]
Two simple circuits are implemented to drive two LEDs from a battery powered microprocessor.
This design is based on a circuit that uses three resistors and a microprocessor I/O pin as an input h...[Details]
1. Principle of displacement angle sensor
The angle sensor is used to detect angles. It has a hole in its body that fits the LEGO axle. When connected to the RCX, the angle sensor counts once ...[Details]
Microcalorimetry
is used to determine energy relationships. Microcalorimetry techniques are often required when performing calorimetric experiments with small sample sizes or slow heating rat...[Details]
1. Introduction to CIF Board
Fieldbus integration based on PC system
Whether it is a master or a slave, fieldbus has won unanimous praise in the field of PC-based automation. For more...[Details]
I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[Details]
Embedded System
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