wow great work man i love it i havent got it to work but i love it 
,
im not sure if its hardware or not but theres a few things im not sure about
first off i used constructor U8GLIB_ST7687_C144MVGD u8g(2, 4, 6, 8, 10); i hope thats fine
im useing logic level converters to talk at 3v to the screen and looking at the datasheet for the ST7687 im guessing that " pin 27 A0" is SCL , "pin 25 D0" is SI and "pin 24 D1" is A0 a little confuseing but i keep going
its then i look at how its set into spi mode
and it says that IF1 & IF2 go high and IF3 is pulled low however according to the screen datasheet
Redirect Notice my lcd has only IF1 "pin14" & IF2 "pin 13" so unsure what todo next i tried combos of IF1 and 2 high and low but nothing is working the rest of the pins seem to be there and it looks to be hooked up right but im really not sure maybe the screem caint do spi? i really hope it can but this isnt looking good lol might have to be an wire interface :s not a big drama but i do like the idea of less pins , thanks you for your great work and i hope i've given enough info for you to help please let me know if theres anything else you'd like to know or how i can help get this working