Would like to purchase a 3-wire spi 16x2 display to use with my arduino uno. To jump start, is there some simple code that will demo the operation, so that I can verify wiring? I’m cookbook at this point, need t’s crossed and i’s dotted. Suggestions on a display?
Why not TTL serial or even USB ?
All the ones I could find on the Sparkfun website are TTL serial. They do have example code in the QuickStart Guide…
Adafruit has this: http://www.adafruit.com/products/292 which supports both SPI and I2C. Again example code is given as part of the docs.