I start a loop on timer interrupt and check all status flags, then move on if nothing interesting is happening. Usually the interrupt loop just takes care of the hardware and posts another software flag to the main loop. The idea is to spend as little time in the interrupt as possible, or less. ;-)
No, I just use the 4-bit (6-wire) interface with blind timing during display init. There's no reason to ever have to read the display.
Save the extra line and the extra code. Keep it simple.
Tom
I guess no one else interpreted this question the way I did...
Is is not possible to "store" data in the character ram for special characters and then read this back into the uPC? I've never had the need to do this, but if you're short on RAM (which I know hardly ever happens on modern microcontrollers..), couldn't you use the unused character RAM on the LCD for general purpose storage, or are these LCD locations write-only?
Just wondering...
-mpm
Have something to add? Share your thoughts — no account required.
Ask the community — no account required