JHD12864E graphics lcd interfacing with LPC2148

Timing has been suggested to you more than once as a likely problem. Single-stepping tells you nothing about your timing!
it seems you think "NAAH, I know better"

now a few comments on Andys reply
But was that the correct operation?</
ALSO but was it correctly simulated (I/O simulation is very error prone)
ALSO simulation does NOT not at all consider timing.

also;
jhd12864e does not have much documentation and examples on interfacing with arm
and so friggin what. The required signals are documented, what more do you need? a fried pigeon flying in through the window?

I suggest you refrain from posting till you have had the scope out and checked the timings against the datasheet

Erik

Timing has been suggested to you more than once as a likely problem. Single-stepping tells you nothing about your timing!
it seems you think "NAAH, I know better"

now a few comments on Andys reply
But was that the correct operation?</
ALSO but was it correctly simulated (I/O simulation is very error prone)
ALSO simulation does NOT not at all consider timing.

also;
jhd12864e does not have much documentation and examples on interfacing with arm
and so friggin what. The required signals are documented, what more do you need? a fried pigeon flying in through the window?

I suggest you refrain from posting till you have had the scope out and checked the timings against the datasheet

Erik