martinayotte wrote:Andy, even if LCD is parallel, if code has to assign GPIOs one by one, especially in the case of a shield with D2-D9, where those GPIOs are not consecutive (especially on Netduino2Plus), I/O performance is hard to achieve.
I appreciate that, and am more than impressed with the progress so far. You might like to take a look at http://andybrown.me.uk/2013/08/03/lg-kf700/ in particular the section titled "optimised stm32plus GPIO access mode". It may be applicable to this problem too. You would of course need to know what the maximum speed that the parallel interface can cope with, rather than blatting it with data at full pelt.