CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support

USB high priority interrupt issue

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
srooks



Joined: 04 Feb 2008
Posts: 1

View user's profile Send private message

USB high priority interrupt issue
PostPosted: Mon Feb 04, 2008 2:45 pm     Reply with quote

Hi,

When enabling high priority interrupts on an 18f4550

#include <18F4550.h>
#device HIGH_INTS=TRUE

If I have a USB ISR set at std priority
#int_usb
void usb_isr2() { }

the compiler is forcing it to be high priority .. even though I want the USB ISR to be std priority,
>>> Warning 225 "D:\pic\ex_usb_hid.c" Line 266(1,1): Interrupt level changed USB: NORMAL=>HIGH

I can't see any limitation in the 18f4550 for this, so is it possible to change this behaviour?

I could change the priority register (IPR2) manually .. but the interrupt vector might not be setup.

Any insight appreciated.

thanks,
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group