espressotutorial - ENGRD 2300: Introduction to Digital...

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ENGRD 2300: Introduction to Digital Logic Design Fall 2008 Espresso Tutorial The Espresso logic minimization software can help in the design of large digital logic designs, particularly those with Boolean functions that have more than 4 inputs or with multiple Boolean functions. Downloading DOS Espresso The Espresso software is available on the ENGRD 2300 web site in the Labs section. Download the file espresso112.zip and open it using WinZip or other zip utility. Click on the Setup.exe file to install to a folder of your choice. Open a DOS window and change to that directory and you are ready to go. Input File Format Espresso uses the PLA file format. A file in PLA format lists all the inputs and their corresponding outputs. Example 1 In this example we define a function of three inputs. # this is a comment # three inputs .i 3 # one output .o 1 .p 8 000 1 001 0 010 1 011 1 100 0 101 0 110 - 111 - .e Lines that begin with # are comments and are ignored by espresso. The line .i 3 tells espresso that there are 3 inputs to our function and the line .o 1 tells espresso that there is one output. The line .p 8 tells espresso that there are 8 product terms in the following truth table and the line .e indicates the end of the file. 1
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ENGRD 2300: Introduction to Digital Logic Design Fall 2008 The lines between the .p and .e contain the truth table for the function. In this example, the first 3 numbers contain the input values and the last number (after the space) contains the value
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espressotutorial - ENGRD 2300: Introduction to Digital...

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