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This white paper discusses how market trends, the need for increased productivity, and new legislation have
accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is
changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to
market. This allows FPGA users to design their own customized safety controllers and provides a significant
competitive advantage over traditional microcontroller or ASIC-based designs.
Introduction
The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in
cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas
around machines such as fast-moving robots, and distributed control systems in process automation equipment such
as those used in petrochemical plants.
The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of
electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing
safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was
developed in the mid-1980s and has been revised several times to cover the technical advances in various industries.
In addition, derivative standards have been developed for specific markets and applications that prescribe the
particular requirements on functional safety systems in these industry applications. Example applications include
process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC
62304), automotive (ISO 26262), power generation, distribution, and transportation.
圖Figure 1. Local Safety System
標簽：
FPGA
安全系統
上傳時間：
2013-11-14
上傳用戶：zoudejile
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This Application Note covers the basics of how to use Verilog as applied to ComplexProgrammable Logic Devices. various combinational logic circuit examples, such asmultiplexers, decoders, encoders, comparators and adders are provided. Synchronous logiccircuit examples, such as counters and state machines are also provided.
標簽：
Verilog
XAPP
CPLD
143
上傳時間：
2013-11-11
上傳用戶：y13567890
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A collection of interface applications between various microprocessors/ controllers and the LTC1090 family of data acquisition systems. The note is divided into sections specific to each interface.
標簽：
1090
LTC
AN
26
上傳時間：
2013-11-08
上傳用戶：sssnaxie
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OFELI is an object oriented library of C++ classes for development of finite element codes. Its main features are : * various storage schemes of matrices (dense, sparse, skyline). * Direct methods of solution of linear systems of equations as well as various combinations of iterative solvers and preconditioners. * Shape functions of most "popular" finite elements * Element arrays of most popular problems (Heat Transfer, Fluid Flow, Solid Mechanics, Electromagnetics, ...).
標簽：
development
oriented
classes
element
上傳時間：
2015-03-03
上傳用戶：kbnswdifs
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HawkVoiceDI Project created and maintained by Phil Frisbie, Jr. <phil@hawksoft.com> HawkVoiceDI has been tested on the following platforms: Win32 (9x, ME, NT 4.0, 2000, XP, CE) Linux (various flavors) Contributors (code, ideas, comments, motivation, etc.):
標簽：
HawkVoiceDI
HawkVoiceD
maintained
hawksoft
上傳時間：
2014-01-11
上傳用戶：thesk123
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This code can be used to model a microstrip line or a microstrip
patch antenna (the particular problem being modeled is determined
at compile-time via various declarations).
標簽：
microstrip
particular
antenna
model
上傳時間：
2013-12-31
上傳用戶：wpt
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CBC下寫的串口編程，API函數實例
I wish this site had been around when I was trying to figure out how to make serial communications work in Windows95. I, like many programmers, was hit with the double-whammy of having to learn Windows programming and Win95 serial comm programming at the same time. I found both tasks confusing at best. It was particularly frustrating because I had, over the years, written so much stuff (including lots of serial comm software) for the DOS environment and numerous embedded applications. Interrupt driven serial comm, DMA transfer serial comm, TSR serial comm, C, assembler, various processors... you name it, it had written it. Yet, everything I knew seemed upside-down in the message-driven-callback world of Windows.
標簽：
CBC
串口編程
上傳時間：
2014-06-20
上傳用戶：cccole0605
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This project is created using the Keil ARM CA Compiler.
The Logic Analyzer built into the simulator may be used to monitor and display any variable or peripheral I/O register. It is already configured to show the PWM output signal on PORT3.0 and PORT3.1
This ARM Example may be debugged using only the uVision Simulator and your PC--no additional hardware or evaluation boards are required. The Simulator provides cycle-accurate simulation of all on-chip peripherals of the ADuC7000 device series.
You may create various input signals like digital pulses, sine waves, sawtooth waves, and square waves using signal functions which you write in C. Signal functions run in the background in the simulator within timing constraints you configure. In this example, several signal functions are defined in the included Startup_SIM.INI file.
標簽：
the
Analyzer
Compiler
project
上傳時間：
2013-12-19
上傳用戶：Yukiseop
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This m file models a DPSK UWB system using a delay in one leg of the mixer, correlation receiver low pass filter combination requiring no template for synching. various waveforms are displayed throughout the system to allow the user to observe operation of the system.
標簽：
correlation
receiver
models
system
上傳時間：
2013-12-13
上傳用戶：semi1981
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This is a serial mouse driver, which is compliant with Plug and Play, supports dynamic detection (via serenum) and removal (either hotplug or via the device manager). The code serves as a sample for any serial-enumerable device. The behavior of the various routines is documented in the source code files.
標簽：
compliant
detection
supports
dynamic
上傳時間：
2015-05-16
上傳用戶：dancnc
