Cpu selection help

[longpole001]

well i am about 70% of design down the rd ,
custom matrix keypad is made
prototype pcbs for the design done,
modules purchased etc


controller with the display is started being coded and that when started to see a lack of usable mem when even assigning the pin var with only 1k of mem on the 16f1947

which come to the conclusion that i may have made a error using the 16f1947, although the looking at other 8 bit chip alternative of 18F67K22 appears to be pin to pin compatable with the the 16f1947 , but with 4k of mem . 128k of program data internal 64mhz , i am thinking i can easly add a sram using a spi ( yes hardware spi is now the option of choice.to the spi port ,if i run short of buffer space for the larger mono graphics display ???

it seems the 24F series is not supported by the picbasic form what i can see??
also the cost of the 16bit chips with larger usable mem of 8k is way more than adding some extra ram, although more speed is alway nice !!

[Jerson]

Well I guess you must already know, everything on a GLCD including the text is stored as bitmaps. All that needs space to keep, read and transfer to the screen. I would not say which language is suitable; you must know the difference between a fast car and a regular one. Some professional compilers are fast cars. Once that is known, you can do wonders with whatever tool you have at hand. The thread on CLCD graphics by Art is just one example of what you can achieve.

I have worked on a monochrome GCLD with a 18F46K22 and done a bare bones text kind application using the Internal oscillator. Getting the speed to acceptable levels is the major aspect of the project. One tip would be to use byte aligned writes to the display. If your hardware is not finalized, ensure that you can read the GLCD besides write to it. Helps in doing pixel aligned instead of byte aligned displays.

Sorry if my words sound cryptic. That's what coding GLCDs does to you after a while