Digital signal processing (DSP) is a major application area for embedded systems. Unlike analog signal processing, DSP is largely defined by software, running on a microprocessor that may be embedded between an analog-to-digital and/or a digital-to-analog converter (ADC and/or DAC). In this assignment, you will program, document, and test a zero-crossing detector, with hysteresis for robustness, that also counts the number of samples between zero crossings. This DSP will employ state-space models.