Oliver Broad
ADAFRUIT GP9002 VFD Driver supporting grayscale display, requires GFX-Library Note no "invert" function, also fixed timing issue in "begin"
Dependencies: bitreversetable256
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Adafruit-GP9002-Graphic-VFD-Library
by 
Oliver Broad
History
Improved byte cache, now needs only one SPI data write for a hit.
2016-05-15, by oliverb [Sun, 15 May 2016 07:13:29 +0000] rev 4
Improved byte cache, now needs only one SPI data write for a hit.
Moved the bit reverse LUT out
2016-05-09, by oliverb [Mon, 09 May 2016 09:29:03 +0000] rev 3
Moved the bit reverse LUT out
Caching of address and location of last byte written makes it crazy-fast for vertical-aligned drawing operations; After a pixel write any further pixel writes that land in the same display byte need only one SPI write operation to complete.
2016-05-08, by oliverb [Sun, 08 May 2016 15:30:51 +0000] rev 2
Caching of address and location of last byte written makes it crazy-fast for vertical-aligned drawing operations; After a pixel write any further pixel writes that land in the same display byte need only one SPI write operation to complete.
First working version, enables use of three intensity values instead of pixel on/off
2016-05-08, by oliverb [Sun, 08 May 2016 13:47:58 +0000] rev 1
First working version, enables use of three intensity values instead of pixel on/off
Converted to Library, moved the examples out
2016-05-07, by oliverb [Sat, 07 May 2016 12:53:09 +0000] rev 0
Converted to Library, moved the examples out