Question re: serial LCD

duffling

I have been playing around with the Bs2sx and a Serial LCD display without problem

im thinking of trying the SX/B programming tools , but im curious about one thing..

im currently running my LCD with only one pin from the basicstamp , why do i see diagrams showing the SX connected to a
LCD and its using 8 pins?

im a little confused about this what am i missing?

it is possible for to use only one I/O pin to drive my LCD as this is working rather well

thanks again.
·

Paul Baker

It is likely that the diagrams you are seeing of an LCD connected to SXs are parallel LCDs. I am personally not aware of anything the stamp is capable of doing that the SX can't in one way or another, it may take a little more programming "know how" but its possible. A serial LCD can be interfaced with an SX using one pin (plus common Vdd (if requiring the same supply voltage) and Vss)

Paul
(grr now I have a "smoosh" of Irving Berlin's "Anything you can do" and Blondie's "One way or another" in my head)

Chris Savage

·· I know there is one example that Jon Williams did which is a Serial LCD Controller.· It is intended as a Co-Processor in that context, in that it is taking the serial data (From one pin) and speaking to the LCD with 8 bits.· Even on the serial LCD Displays this has to happen somewhere, usually on a serial backpack sandwiched on the back side of the display.

·· You can use a BASIC Stamp or another SX to talk to Jon's example with just one I/O pin.· Or as Paul mentioned, use a serial LCD Display.



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Chris Savage

Parallax Tech Support
csavage@parallax.com