Graperain Blog ARM Embedded News, Announcements, and Ideas

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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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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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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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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Why we Choose Cortex-A9 as Processor?

With processor applications developing, more and more processors appear on the market, with different features meeting different clients needs. The mainstream processor applications need ever increasing levels of performance to handle higher data rates, more media services and new features such as cryptography and security utilizing a rich user interface. Since consumer demand is the main driver of product development in this application space, a big challenge for manufacturers is to reduce the cost of end products. This isn't just a competitive issue: it is also about opening up new markets in developing countries. 

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