QEi module

nbt1987 · Joined: 28 May 2010 Posts: 3

When use module QEi of PIC18f4431, disable all interrupt IC1,IC2,IC3.
But IC1Flag,IC2Flag,IC3Flag will set 1 automatically when an interrupt condition occur.
I think it don't use any instruction cycle to change its flag.
The Proteus show it true, but when I program in a real PIC, I recognize it seem not true because the delay_ms(1000) generate delay about 3 second when the encoder generate 18000 pulse/second, and it delay 1 second when the encoder stop working (0 pulse/second). I think because encoder signal made interrupt, is it true?
I use crystal 20 MHz.
please explain for me! Thanks

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Post a very small program that shows the problem (10 lines in main). The program must compile with no errors. Also post your compiler
version.

Here is an example of a short program. Notice it has no "Wizard" code:
http://www.ccsinfo.com/forum/viewtopic.php?t=37206&start=2
The program you post should be as short as that (if possible).