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PaulStoffregen / LedDisplay

Print text to an Avago HCMS-29xx LED display
http://www.arduino.cc/playground/Main/LedDisplay
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Library does not function when display length greater than 32 #4

Open jim-thompson opened 6 years ago

jim-thompson commented 6 years ago

When _displayLength (sixth argument to constructor) is greater than 32, the library sends gibberish to the attached string of HCMS-2915 display modules.

I have a string of eight HCMS-2915 modules, daisy-chained in a chain of 8 modules, for 64 characters. When I call the constructor, with a _displayLength of 64, the displays show gibberish in the first 4 modules, and nothing (blank) in the following 4 modules. The gibberish is fixed in that it does not change over time (the code driving these displays was derived from the scroll_multiple example, and should be scrolling, but the gibberish does not change over time). img_1053

jim-thompson commented 6 years ago

I plan to look into this bug myself, unless someone out there has an easy fix. I'm posting it as an issue as a heads-up.