Actel Corporation announced that Aviom, Inc. has exclusively used its flash-based ProASIC Plus field-programmable gate array (FPGA) devices throughout its portfolio of audio network products, including Aviom's award-winning A-16 and A-16R Personal Mixers. In addition, Actel's ProASIC Plus devices are utilized within Aviom's Distributed Audio Network, based on Aviom's proprietary A-Net data transmission protocol, which allows high-speed,real-time transmission of multi-channel audio over a single Category 5 wire in both fixed and mobile audio scenarios. Chosen for superior flexibility and security, Actel's live at power-up, nonvolatile ProASIC Plus devices serve asthe main engine throughout Aviom's audio network and perform a wide variety of critical processing and control functions.

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Actel Corporation announced that Aviom, Inc. has exclusively used its flash-based ProASIC Plus field-programmable gate array (FPGA) devices throughout its portfolio of audio network products, including Aviom's award-winning A-16 and A-16R Personal Mixers. In addition, Actel's ProASIC Plus devices are utilized within Aviom's Distributed Audio Network, based on Aviom's proprietary A-Net data transmission protocol, which allows high-speed,real-time transmission of multi-channel audio over a single Category 5 wire in both fixed and mobile audio scenarios. Chosen for superior flexibility and security, Actel's live at power-up, nonvolatile ProASIC Plus devices serve asthe main engine throughout Aviom's audio network and perform a wide variety of critical processing and control functions.

The service will reportedly award a total of seven Netcents contracts: four to large and medium-sized companies and three to smaller contractors.

The program is overseen by the Air Force's Headquarters Standard Systems Group at Maxwell Air Force Base, Ala.

FZUYP5E5EAAM070_Datasheet PDF

The Pentagon's command, control, communications and intelligence shop has for several years been pressing the services to shift to network-centric operations as a way to broadcast time-sensitive data like target information directly to troops in the field.

SANTA CRUZ, Calif. — Linking two widely-used electronic design products, Cadence Design Systems has announced an interface between its PSpice analog simulator and the Matlab modeling tool from The Mathworks. The interface allows the co-simulation of electrical and mechanical systems.

The new PSpice interface, called SLPS, was co-developed by Cadence and Japanese company Cybernet Systems. It links PSpice to both Matlab and The Mathworks' Simulink simulator, and can be used with a new PSpice Smoke option to provide reliability analysis.

FZUYP5E5EAAM070_Datasheet PDF

SLPS allows users to substitute electronic blocks in PSpice, allowing co-simulation with Matlab and Simulink. By simulating electronics within a complete electrical-mechanical system, Cadence claims, users may be able to create a successful system design with only one prototype.

The PSpice Smoke option, meanwhile, lets designers perform a stress audit to verify that electrical components are operating within the manufacturer's safe operating limits or de-rated limits. The Smoke tool flags violations such as power dissipation, secondary breakdown limits, current/voltage and junction temperature limits.

FZUYP5E5EAAM070_Datasheet PDF

Both the PSpice SLPS interface and the Smoke option are available now as part of Cadence’s OrCAD product line.

ESPOO, Finland — Bitboys Oy has licensed its G34 graphics processor to NEC Electronics as an intellectual property core, the company said Tuesday (August 10).

Organizing the Context—The GCC 'naked' Attribute The previous section showed how you can use the 'signal' attribute to write an ISR in C and how this results in part of the execution context being automatically saved (only the microcontroller registers modified by the ISR get saved). Performing a context switch however requires the entire context to be saved.

The application code could explicitly save all the registers on entering the ISR, but doing so would result in some registers being saved twice—once by the compiler generated code and then again by the application code. This is undesirable and can be avoided by using the 'naked' attribute in addition to the 'signal' attribute.

void SIG_OUTPUT_COMPARE1A( void ) __attribute__ ( ( signal, naked ) ); void SIG_OUTPUT_COMPARE1A( void ) {    /* ISR C code for RTOS tick. */    vPortYieldFromTick(); } Listing 5:  Addition of the 'naked' attribute to the compare match ISR

The 'naked' attribute prevents the compiler generating any function entry or exit code. Now, compiling the ISR results in the much simpler output:

;void SIG_OUTPUT_COMPARE1A( void ) ;{    ; ---------------------------------------    ; NO COMPILER GENERATED CODE HERE TO SAVE    ; THE REGISTERS THAT GET ALTERED BY THE    ; ISR.    ; ---------------------------------------    ; CODE GENERATED BY THE COMPILER FROM THE    ; APPLICATION C CODE.    ;vTaskIncrementTick();    CALL    0x0000029B    ;Call subroutine

When critical data is being transmitted, the robust error detection and handling is a key advantage of CAN. The protocol uses nonreturn-to-zero coding with bit stuffing to maintain network synchronization. Each message contains a CRC field and the controller on the receiving node processes this to check that the message is error free. Correct reception of the message is positively acknowledged and retransmission for messages with errors is requested by generation of an error flag. Nodes that consistently generate errors are switched off by the network, protecting the bus from being taken over by a babbling idiot” node.

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