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LCD Driver part #4 - Pulling It All Together
As a final step in my experiments with the AMPY-2001 LCD I decided to add a pair of 7-segment LED displays to show how many messages where available to display. In addition I tweaked my code to allow me to determine when there is a short or long press of the AMPY-2001 button. Finally I spent some time tidying up the code so its a wee bit more professional :-)
Now I'm at a point where things are pretty much completed I'll also take some time in this blog to explain how I've set things up. Based on this lets start with an overview of how... [More]
Tags: display lcd mqtt pi 7-segment raspberry ampy-2001 |
LCD Driver part #2 - Using Java
So I finally found a few spare cycles to fire up my Eclipse environment on the Mac and dust of my Java skills to have a play with PI4J in an attempt to re-write my LCD driver code in Java. The results were very good and the PI4J library is very easy to use. The main challenge I had was to map the Java character codes into the right codes for the LCD. This was pretty easy to address with some basic inner classes. With all this in place the code worked like a dream (though there is a minor bug in the scrolling code which I'll fix at some... [More]
Tags: raspberry pi4j lcd pi |
Basic LCD Driving via Raspberry PI
During a recent trip to Maplins I spotted a "Lucky Dip" bag which contained a LCD screen (and a number of other various interesting components) so decided to pick it up and have a play at driving it from my Raspberry PI.
When i got home and had a chance to look at the bag in more detail I became clear that the LCD included in the bag was not a standard one The "Luck Dip" bag included the following schematic but didn't provide much details re how to drive it. A bit more digging uncovered that this LCD was based on the... [More]
Tags: raspberry lcd pi ampy-2001 |
