I recently received a Nokia 5110 LCD screen and have hooked it up to my Uno and got it displaying stuff.
I'd like to try using it in a project with an ATtiny85 and found some resources to that effect, however, I'd like to be able to run it from fewer pins than the 5 I've started off with.
I found a few things online which suggested I can tie the RST to VCC and the CE pin to ground.
I connected RST to VCC and that seems to work ok.
Connecting CE to ground doesn't work properly - it either displays half inverted with a bit of garbage or more usually just displays nothing at all. From looking at the datasheet, CE needs to see a falling edge in order to enable.
I reconnected it to a pin and modified my code so that it simply writes it
HIGH and then
LOW in the
setup() function and leaves it alone after that and the screen seems to work happily after that.
Feels like a waste of a pin though! Is there any way I can simulate the falling edge without it needing to be connected to a pin?