mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
85 lines
3.0 KiB
Markdown
85 lines
3.0 KiB
Markdown
|
|
||
|
|
[](https://github.com/marketplace/actions/arduino_ci)
|
||
|
|
[](https://github.com/RobTillaart/ParallelPrinter/blob/master/LICENSE)
|
||
|
|
[](https://github.com/RobTillaart/ParallelPrinter/releases)
|
||
|
|
|
||
|
|
# ParallelPrinter
|
||
|
|
|
||
|
|
Arduino library that implements a parallel printer (driver) - implements the PRINT interface
|
||
|
|
|
||
|
|
|
||
|
|
## Description
|
||
|
|
|
||
|
|
This library defines a parallel printer object.
|
||
|
|
|
||
|
|
It implements the **Print interface** to be able to print all datatypes using **write()**, **print()** and **println()**
|
||
|
|
The printer writes every byte over 8 parallel lines including a **STROBE** (clock) pulse,
|
||
|
|
while waiting for the connected printer not to be **BUSY** or **OUT OF PAPER**.
|
||
|
|
|
||
|
|
This library is meant to be a starting point to make a "printer driver" for a
|
||
|
|
specific parallel printer. These can often be bought in 2nd hand stores or so.
|
||
|
|
|
||
|
|
Have fun!
|
||
|
|
|
||
|
|
**Note:** This lib is a extended redo of the ParPrinter class.
|
||
|
|
|
||
|
|
|
||
|
|
## Interface
|
||
|
|
|
||
|
|
### Constructor
|
||
|
|
|
||
|
|
- **ParallelPrinter()** uses default pins (13, 2, 12, \[3,4,5,6,7,8,9,10\])
|
||
|
|
- **ParallelPrinter(strobe, busy, oop, arr)** define 3 control pins + 8 datapins (= arr)
|
||
|
|
- **begin(linelength, pagelength)** set line and page length parameters
|
||
|
|
|
||
|
|
|
||
|
|
### Print interface
|
||
|
|
- **write(c)** send a single byte to printer, implements Print interface.
|
||
|
|
Therefor all **print()** and **println()** functions will work.
|
||
|
|
- **formfeed()** to eject current page or forced go to the next page.
|
||
|
|
- **linefeed()** send a linefeed. The number of actual lines is set by **setLineFeed()**
|
||
|
|
|
||
|
|
|
||
|
|
### Config
|
||
|
|
|
||
|
|
These settings are pretty straightforward.
|
||
|
|
|
||
|
|
- **setLineLength(lineLength)** idem
|
||
|
|
- **getLineLength()** returns the current line length.
|
||
|
|
- **setPageLength(pageLength)** idem
|
||
|
|
- **getPageLength()** returns the current page length.
|
||
|
|
- **getLineNumber()** returns current line number.
|
||
|
|
- **getPageNumber()** returns current page number.
|
||
|
|
- **getPosition()** returns the position on a line.
|
||
|
|
- **setTabSize(tabsize)** tabs are replaced by spaces. n can be 0 or any size!
|
||
|
|
- **getTabSize()** returns tabSize set
|
||
|
|
- **setLineFeed(lineFeeds)** lineFeeds = 1,2,3 1 = default
|
||
|
|
- **getLineFeed()** returns lineFeeds set
|
||
|
|
- **printLineNr(bool)** can be set to true, false
|
||
|
|
|
||
|
|
|
||
|
|
### Expert mode
|
||
|
|
|
||
|
|
- **isOutOfPaper()** to check paper tray before printing starts.
|
||
|
|
- **setStrobeDelay(n = 2000)** make the strobe pulse shorter == faster printing
|
||
|
|
allows tuning of performance. Default value = 2000. Time in microseconds.
|
||
|
|
- **getStrobeDelay()** returns value set.
|
||
|
|
|
||
|
|
**Note** mechanical printers e.g. dot matrix, really do need a way to stop receiving
|
||
|
|
data as they do not have large buffers.
|
||
|
|
|
||
|
|
|
||
|
|
## See also
|
||
|
|
|
||
|
|
https://en.wikipedia.org/wiki/Parallel_port#Centronics
|
||
|
|
|
||
|
|
|
||
|
|
## Future
|
||
|
|
|
||
|
|
- Make a front end of a parallel printer, that accepts the clocked bytes and print them
|
||
|
|
- derive e.g. an HP or an EPSON printer from this class.
|
||
|
|
|
||
|
|
## Operation
|
||
|
|
|
||
|
|
See examples
|