Graperain Blog ARM Embedded News, Announcements, and Ideas

Embedded Linux Boot Process


First, plan image when porting linux , such as 64m SDRAM,

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Release: pty001 Category: Embedded hardware design Comment: 0 Viewed: 0

ARM Processor Floating-point Unit (FPU)

Introduction to Floating Point Unit (FPU)

Float Point Unit, floating-point unit is a dedicated and floating-point coprocessor, in the field of computing, such as trigonometric functions and time-domain frequency domain transforms are usually used in floating-point operations. When the CPU executes a program that requires floating-point arithmetic, there are three ways to do it: the software simulator (floating-point arithmetic function library), the additional floating-point arithmetic unit, and the integrated floating-point unit. Different from the previous ARM9 processor, currently based on the Contex-TM architecture of ARM processing are integrated floating-point unit. The Nvidia Tegra 2, Tegra 3 and NXP / Freescale i.MX 6 integrate the VFPv3 floating-point unit as shown in the Toradex ARM Core Board product. NXP / Freescale i.MX 7 integrates the VFPv4 floating-point unit. The ARM floating-point architecture (VFP) provides hardware support for floating-point operations in half-precision, single-precision, and double-precision floating-point operations. It fully complies with the IEEE 754 standard and provides full software library support that enhances image application performance (such as scaling, 2D and 3D translation, font generation, and digital filtering) when used in conjunction with NEONTM's multimedia processing capabilities. 

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Release: pty001 Category: System On Module Comment: 0 Viewed: 0

Application of ARM System on Module in Base Station Monitoring

Application of ARM System on Module in Base Station Monitoring. In 2014, China Mobile, China Unicom and China Telecom jointly set up China Iron Tower Co., Ltd. The main business scope includes: construction, maintenance, operation of base stations, power supply, air conditioning facilities and indoor distribution system; And the maintenance of the base station equipment.

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Release: pty001 Category: System On Module Comment: 0 Viewed: 0

[Hardware Design] Embedded Input Device Design

Today  interactive devices are not only complex hardware devices, the complexity of the relevant data also greatly increased.


Common human-computer interaction input devices, including buttons, touch screen, microphone and other types of user-controlled input sensor. With the development of science and technology, not only our common interactive input device appeared new form, but also appeared a lot of new interactive input mode. For example, now the phone in the capacitive key and the gravity sensor, distance sensor.

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Design and Realization of Embedded Smart home Monitoring System

With the rise of home network research, how to design a kind of home gateway management, protocol conversion and home network monitoring as one of the home gateway, to achieve home appliances network, intelligent and remote control, has become the current research focus.

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From the CPU Chip to Embedded Products - "System-on-Module (SOM) + Carrier Board" Mode of Cooperatio

With the advent of automation and digital era, embedded products more and more welcomed. From computer, mobile phones and other consumer electronics to the hospital's medical equipment, plant control equipment, and even satellites and spacecraft electronic equipment, embedded products appears everywhere, they are relevant to our lives.

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Release: pty001 Category: System On Module Comment: 0 Viewed: 0

Digital Voltage Regulating Control System Based on ARM Embedded Platform

With the development of electronic information technology and semiconductor technology, the application of embedded system is becoming more and more widespread. In the field of control, more and more high-performance microprocessors are used to meet the demands of more and more control applications. Based on ARM embedded platform digital voltage control system, to overcome the traditional knob or sliding type rheostat AC voltage analog control of the drawbacks. The system is based on embedded technology, in the embedded platform using ARM microprocessor real-time control of digital-analog signal conversion to control the sine wave voltage regulator module to adjust the size of the AC voltage. In this paper, the actual test of the system to verify the digital voltage control system of the functional characteristics, and quantitative testing of the system can be achieved AC voltage linear regulation of the conclusions. Digital voltage control system can be used as intelligent regulating device for voltage, home, medical and industrial automation and other fields, and has a high degree of regulation, good linearity adjustment, easy to operate and other characteristics. Voltage regulator control system as an intelligent regulator of the voltage management device commonly used in the family, medical and industrial automation and other fields. In the past, adjustment of AC voltage was usually realized by using slip or rotary rheostat connected to the voltage circuit. The long rotation of the knob could cause the adjustment insensitivity or even failure. The adjustment accuracy was reduced and the error was large. With the rapid development of electronic technology and embedded technology, more and more embedded systems are applied in control field. It is very important to realize digital voltage control system of digital intelligent control on embedded platform. In this paper, ARM Cotrex-A8 microprocessor is used to build the hardware control platform, and Linux is used as the embedded operating system, which is real-time and easy to develop.

Circuit Design of ARM Embedded Isolated Words Speech Recognition System

Speech recognition technology is to make the computer "understand" the human language, and then according to its meaning to the implementation of the corresponding order, in order to achieve human services. With the in-depth study of speech recognition, its technology has two main applications: one direction is a large vocabulary continuous speech recognition system, mainly used in computer dictation machines, and telephone networks or the Internet combined voice information query service systems, these systems are implemented on the computer platform; Another important development direction is the miniaturization, the application of portable voice products, most of these applications using a dedicated hardware system. With the advent of post-PC era, the latter development will become a very popular topic of speech recognition technology and embedded system cross-research, which will further promote the development of speech recognition technology to the intelligent direction.

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Release: pty001 Category: System On Module Comment: 0 Viewed: 0

The key driver of the Internet wave: industrial single board computers

With networking technology, network nodes are now no longer just home desktop computer, or mobile devices, every machine, every object we contact, the future may become "conscious", our life will be become more networked, through a variety of intelligent devices will make us more closely with the world, a new era of Internet of things has arrived. In this concept, the hidden behind the industrial single board computer (Industrial SBC) is to promote the future of things like the implementation of an important promoter of life, what is the industrial computer?