By Frank Vahid
ISBN-10: 0471386782
ISBN-13: 9780471386780
This ebook introduces a contemporary method of embedded approach layout, offering software program layout and layout in a unified demeanour. It covers tendencies and demanding situations, introduces the layout and use of single-purpose processors ("hardware") and general-purpose processors ("software"), describes thoughts and buses, illustrates hardware/software tradeoffs utilizing a digicam instance, and discusses complicated computation types, controls structures, chip applied sciences, and smooth layout instruments. For classes present in EE, CS and different engineering departments.
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Extra info for Embedded System Design: A Unified Hardware Software Introduction
Example text
When the controller detects a button press, it stores a code corresponding to that button into a register and sets an output high, indicating that a button has been pressed. Our software may poll this output every 100 milliseconds or so, and read the register when the output is high. Alternatively, this output can generate an interrupt on our general-purpose processor, eliminating the need for polling. 7 3-5 Stepper motor controller A stepper motor is an electric motor that rotates a fixed number of degrees whenever we apply a "step" signal.
We translate that description to a truth table, with all possible combinations of input values on the left, and desired output values on the right. For each output column, we can derive an output equation, with one term per row. However, we often want to minimize the logic gates in the circuit. We can minimize the output equations by algebraically manipulating the equations. 3: Combinational logic design. (a) Problem description (d) Minimized output equations y y is 1 if a is equal to 1, or b and c is equal to 1.
We want to generate an analog output voltage for the given binary numbers over time. We generate the analog signal shown. We can compute the digital values from the analog values, and vice-versa, using the following ratio: e Vmax = d 2 −1 n Vmax is the maximum voltage that the analog signal can assume, n is the number of bits available for the digital encoding, d is the present digital encoding, and e is the present analog voltage. 1(c). 5V. 1(c). The resolution of a DAC or ADC is defined as Vmax/(2n-1), representing the number of volts between successive digital encodings.
Embedded System Design: A Unified Hardware Software Introduction by Frank Vahid
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