On the same topic: https://www.researchgate.net/publication/266860236_Increasing_the_efficiency_of_IO_usage_in_small_embedded_systems
On Fri, Dec 12, 2014 at 7:11 AM, Sunish Issac <[email protected]> wrote: > > I had written jal program long back using charlieplexing for a 12 led dot > mode programmable voltmeter. Its addicting to add lots and lots of leds > with just few pins. I've seen seven segment displays being run on > cherlieplexing. > > Sunish > > On Thu, Dec 11, 2014 at 3:45 PM, Rob Hamerling <[email protected]> > wrote: >> >> >> Hi, >> >> I'm afraid I have to admit that I got fascinated by 'charlie-plexing' >> lately, a method to control many leds with few wires. See for example >> http://en.wikipedia.org/wiki/Charlieplexing >> A nice example of this is Jimmy Rogers' LoL (Lots of Leds) shield for the >> Arduino: a 9x14 matrix of 126 leds controlled by 12 pins. See: >> http://jimmieprodgers.com/kits/lolshield/makelolshield/ >> For this board I found mostly references to C-libraries and programs. >> I thought it would be a challenge to control this board with a PIC and a >> program written in Jal. That proved to go better than I had expected! I >> started with a smaller setup for 10 and 12 leds, but finally got the 9x14 >> matrix under control as well. >> You can find results in Jallib (http://code.google.com/p/jallib/) >> Look for library 'charlie.jal' and samples for 12f683, 12f1840 and >> 16f1786. >> >> Regards, Rob. >> >> >> -- >> R. Hamerling, Netherlands --- http://www.robh.nl >> >> -- >> You received this message because you are subscribed to the Google Groups >> "jallib" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/jallib. >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/jallib. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/jallib. For more options, visit https://groups.google.com/d/optout.
