2020-06-24 15:02:26 +00:00
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# ParallelPrinter
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2020-06-25 08:19:33 +00:00
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Arduino library that implements a parallel printer - uses print interface
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## Description
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This **experimental** library defines a simple parallel printer object.
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It implements the **Print interface** to be able to print all datatypes.
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It writes every byte over 8 parallel lines including a **STROBE** (clock) pulse,
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while waiting for the connected printer to not be **BUSY** or **OUT OF PAPER**.
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This library is meant to be a starting point to make a "printer driver" for a
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specific parallel printer. These can often be bought in 2nd hand stores or so.
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Have fun!
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Note: _This lib is a extended redo of the ParPrinter class._
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## Interface
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* **ParallelPrinter(strobe, busy, oop, arr)** define 3 control pins + 8 datapins (= arr)
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* **begin(linelength, pagelength)** set page parameters
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* **write(c)** send a single byte to printer, implements Print interface.
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* **setTabSize(n)** tabs are replaced by spaces. n = 2,4,6,8
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* **setLineFeed(n)** n = 1,2,3 1 = default
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* **printLineNr(b)** true, false
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* **formfeed()** to eject current page
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* **isOutOfPaper()** check paper tray before printing starts
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* **setStrobeDelay(n)** make the strobe pulse shorter == faster printing
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allows tuning of performance. Typical value = 2000. Time in micros.
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use with care.
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## See also
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https://en.wikipedia.org/wiki/Parallel_port#Centronics
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## Operation
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See examples
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