Holtek HT1632C LED Driver Library

Firmware Libraries
1

Hi

I’m porting the Arduino library for the HT1632C LED driver that uses some dot matrix displays like Sure Electronics ones.

Right now it’s in ALPHA stage and I have only tested on 32x16 displays, other geometries might not work.

Currently supports:

  • drawing graphic primitives (points, lines, circles,…)
  • drawing single color bitmaps
  • printing chars and texts in fixed positions (no scrolling, 23 different fonts)
  • RG colors (red, green and orange)
  • 16 brightness levels

Features I plan to add:

  • Documentation :smile:
  • Horizontal and vertical scroll
  • 2-colour and 3-colour characters
  • Blinking and fading effects

Check it out here: https://bitbucket.org/xoseperez/sparkcore-ht1632

The example code output:

http://tinkerman.eldiariblau.net/wp-content/uploads/2014/02/ht1632c_example.jpg

5 Likes
2

The LED boards are very cool. First I have ever seen them. They look great for time and temp message boards.

Thanks for sharing this.

3

That display looks HUGE! :slight_smile: Very cool! Thanks for sharing!

4

This is exactly what I was looking for, thanks for sharing.

I noticed that out of the 4 displays I tested (32x16 boards from Sure Electronics with 3mm LEDs), only one does accept the 3.3V signal while being powered with +5V. On the three others, the first two 8x8 LED groups miss the new frame more often than not. All work fine if powered with 3.3V, but the display is dim.

A simple 74HC4050 in between to shift the levels to 5V fixed the issue.

1 Like
5

Where is The Examples?
i want to try, and also which pin should i set?

6

@xose, that looks great! I ported a DMD library for another member using a Freetronics display:

The more the merrier! :stuck_out_tongue:

7

@shiningstone There is an application.cpp file in the src folder that exemplifies some basic functions. To know which pins goes where, you have a map in the #defines at the top of the same file. Your display should have a connector with the pin names written alongside.

8

Hi @peekay123, great work! You are right, the more the merrier.
Next step is to contribute them as libraries for the online IDE.

9

yes thanks xose ,