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Jon Titus
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Re: Part IV: Fundamentals of Digital Debugging
Jon Titus   1/19/2012 5:24:26 PM
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Q:  hope that Jon's secret debugging shows up in his book..more elaborately.

 

A:  It's just a connection from a UART output pin to the serial-input pin on the printer.  Download a printer manual to determine the codes needed to set up a specific font.  You just send ASCII values to the printer to print the corresponding character.  Someone noted printers might need a TTL-to-RS-232 interface.  That's true, but my printer uses the plain TTL signals.  Maxim Integrated Products sells many types of TTL-to-RS-232-converter chips.  They're easy to use if you need one.



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