Other

Scientific Microsystems, Inc.

Daniel R Hafeman

Robert Marc Zeidman

Michael Barr

William B Fazakerly

A method and an apparatus take software source code to synthesize a hardware platform for running the software. The method determines which processor is suitable for running the code and meeting the performance parameters determined by the user. The method also determines which hardware devices are accessed by software. If the hardware target is a semiconductor chip, the invention selects the appropriate IP and creates an HDL description of the chip. If the hardware target is a printed circuit board, the invention creates a schematic or netlist that includes the appropriate microprocessor, the various semiconductor chips, and the necessary interconnections.

Method and apparatus for selecting a hardware representation from a software description

A platform for running embedded software using an inexpensive standard personal computer is disclosed. A particular embodiment includes a compiler assist component and a runtime component. The compiler assist component operates in conjunction with a standard personal computer compiler to compile an embedded system application to run on a conventional personal computer. The runtime component executes on the personal computer and operates in conjunction with the standard operating system drivers to allow an emulated system to communicate with real hardware connected to the personal computer or to virtual hardware that is simulated on the personal computer.

Method and apparatus for emulating a hardware/software system using a computer

Method and apparatus for synthesizing a hardware system from a software description

A second order filter signal is derived in response to a phase comparison of two signals by selecting an input voltage from a reference voltage, a first voltage potential higher than the reference voltage, and a second voltage potential lower than the reference voltage depending on the phase error of the two signals. The input signal is applied to a loop filter including a non-inverting integrator and to a feed forward circuit. The outputs of the amplifier and feed forward circuit are summed and applied to an output terminal as the second order filter signal. An improved phase locked oscillator circuit is provided in which a digital phase comparator drives an active loop filter including a feed forward circuit and a non-inverting integrator.

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Sunnyvale, CA, United States of America

Daniel R Hafeman