How to control Sharp LH155BA controller based LCD displays e.g. the Powertip PG12864LRF-NRA-H
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0) For serial: fix WR to low, RD to high, PS low
1a.) CS high, RES low, SCL low, SDA low, RS low
1b.) for parallel interface: PS high, WR low, RD high
2.) wait for power to stabilize (e.g. 10 ms)
3.) RES high. Wait 1 ms
4.) Write d7-d0: 10110001	(control power register I)
5.) Write d7-d0: 10110010	(control power register II)
6.) Write d7-d0: 10000001	(display control set)
7.) Write d7-d0: 11011100	(contrast level VERY low 10 = 1010, contrast level high 13=1101	)
				(thanks to to J.Sturz and T.Winkler from TI)
				(you HAD TO SET THIS!)