Question about the Graphical LCDs

[shobley]

I've been looking over the library used to support the graphical LCDs - I notice that reading data from the frame buffer is done in the write data routines - is this necessary when just drawing on the device?

I can understand how it would be important if you needed to invert part of the image, but is it possible to just set the bits in the display regardless of what the previous data was?

The regular character LCDs also allow reading, but most of the time the R/W is just connected to ground (always write).

Steve