How to properly test Nokia 5110 display (PCD 8544) #
With WiringPi (software spi) #
http://binerry.de/post/25787954149/pcd8544-library-for-raspberry-pi https://github.com/binerry/RaspberryPi/tree/master/libraries/c/PCD8544
Caveats #
Blue pcb -> LED has to be Up to have backlight.
Specs : http://skpang.co.uk/catalog/images/lcd/graphic/docs/User_Manual_ET_LCD5110.pdf
With some displays (coming from china), there might be some tweaks needed :
- changing LCD bias mode from 0x14 to 0x15 or even 0x17
- Tweaking the contrast (LCD Vop)
- Putting everything to low before starting anything
Some random links :