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54 lines
1.4 KiB
Markdown
54 lines
1.4 KiB
Markdown
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# HT16K33
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Arduino Library for HT16K33 I2C 4x7segment display
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## Description
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This library is for the Adafruit 4x7segment display with HT16K33 driver,
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http://www.adafruit.com/products/1002
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This library is functionally less capable than Adafruits especially
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it has no support for negative numbers.
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However it is much faster for writing an int / hex to the display.
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Test on UNO, I2C.setClock(100000); // version 0.1.2
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0-9999 integers 3.960 sec
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0-65535 hexadecimal 23.685 sec
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Test on UNO, I2C.setClock(800000); // version 0.1.2
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0-9999 integers 1.223 sec
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0-65535 hexadecimal 6.350 sec
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Substantial part of this performance gain is due to an internal
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cache of the digits displayed, so other tests and real live
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usage may result in different gain.
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## Release notes
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* 0.1.3
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**suppressLeadingZeroPlaces(val)** replaces leading zero with space.
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Works only correctly for integers (for now).
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If you have two (or multiple) displays to display long integers
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you can suppress 4 zero's in the left display and 3 zero's in the right display.
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* 0.1.4
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**displayRaw(ar[4])** added, to be able to display any pattern possible
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**displayVULeft(val)** and **displayVURight(val)** added, shows 0..8 vertical bars,
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uses **displayRaw()**.
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* 0.1.5
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refactor
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added minus sign in the char map.
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* 0.2.0
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fix brightness bug
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ESP32 support
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* 0.2.1
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fix decimal point in **printFloat()**
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## Operation
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See examples
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