Real-time signal analysis apparatus and method for digital signal processor emulation

摘要

An emulation system used to debug software for a digital signal process (DSP) (6) includes a built-in digital signal analyzer (18) which operates upon the same digital signals as those presented directly to and outputted by the DSP (6), bypassing the signal converters (4, 8) used to convert an input analog signal to digital format and the output digital signal to analog format. A host computer (12) communicates with the digital signal analyzer (18) via firmware in a control processor (30) and personality board (36), or is alternately connected directly with the analyzer (18). Communications between the digital signal analyzer and the DSP (6) are through the same contact probe (14) as that used for the emulation software. The analyzer may be used to trigger a software function within the emulator (20) based upon the real-time signal from the DSP (6), and is also capable of interpolating between successive digital values of an analyzed signal for display purposes.