Arduino library for 7 segment display control
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
Seg7
COPYING.txt
README.txt

README.txt

Seg7 library 1.0 by David Kaplan (david@2of1.org), 2010
http://blog.2of1.org

About
------------------------------------------------------------------------------

Seg7 is an Arduino library that allows for easy control of LED 7 segment 
displays. It can currently support multiple displays and decimal digits and 
is licensed under GPL v3.0.


Installation
------------------------------------------------------------------------------

Place the Seg7 folder in <arduino software director>/libraries/.
You'll need to restart the Arduino software before you can use the library.


Usage
------------------------------------------------------------------------------

Firstly include the Seg7 header in your sketch:

#include <Seg7.h>

Then initialise an instance of the library as follows:

Seg7 display = Seg7();

You then need to specify the 7 segment display pinout buy calling the attach()
function (see 'Wiring' below):

display.attach(0, 1, 2, 3, 4, 5, 6, 7);    // a, b, c, d, e, f, g, dp

If you wish, you can specify the pin mapping (of the first display) in the 
constructor. The following is equivalent to the above two lines:

Seg7 display = Seg7(0, 1, 2, 3, 4, 5, 6, 7);

To write to the display, simply call the write() method:

display.write(7);

The Seg7 library has support for multiple displays. Simply attach each in turn
(starting from units, then tens, then hundreds...):

display.attach(0, 1, 2, 3, 4, 5, 6, 7);        // units
display.attach(8, 9, 10, 11, 12, 13, 14, 15);  // tens

You can then call write() with multiple digits:

display.write(39);

NOTE: You can add up to three displays. If you wish to add more than three,
simply increase the value of MAX_DISPLAYS in Seg7.h.

ALSO NOTE: By default, the Seg7 library assumes that your display is common-anode. If your display is in fact common-cathode, you need to call set_cathode(true).


Wiring
------------------------------------------------------------------------------

7 segment displays usually have 10 pins.
Pins 3 and 8 are common - and are connected in either a common-anode (+V) or
common-cathode (GND) configuration (you only need to connect one of them).

NOTE: Seg7 works in the common-anode configuration by default. If you have a 
common-cathode display, you'll need to call the set_cathode() function, e.g.: display1.set_cathode(true);

The rest of the pins are mapped as follows:

a - 7
b - 6
c - 4
d - 2
e - 1
f - 9
g - 10
dp/h - 5


Todo
------------------------------------------------------------------------------

1. Support for hexadecimal digits
2. Support for dp (decimal point)
3. Support for 4511 decoder chip

----------
!HAVE FUN!
----------