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Problem with Timer1 using PIC18F26J11

 
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Manel28



Joined: 06 May 2010
Posts: 33

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Problem with Timer1 using PIC18F26J11
PostPosted: Fri Jul 09, 2010 12:39 am     Reply with quote
Hi,
I'm having some problems using this PIC. I'm not able to make the timer1 overflow and thus the interruption never happens. I'm using CCS compiler v4.093 and may be its something wrong in the header file or something not defined because this PIC has 2 configuration registers for the timer.
I have checked the same code with other PIC 18F8722 and there is no problems with the timer. I'm doing something like:
Code:

enable_interrupts(INT_TIMER1);             
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8); 
set_timer1(0xDF72);                           
enable_interrupts(int_rda);
enable_interrupts(global);

and the interruption is defined:
Code:

#int_timer1
void timer1_isr(){
temporizador=1;
set_timer1(0xDF72);
}

Timer1 in header file is defined:
Code:

Timer 1 Functions: SETUP_TIMER_1, GET_TIMER1, SET_TIMER1
// Constants used for SETUP_TIMER_1() are:
//      (or (via |) together constants from each group)
#define T1_DISABLED         0
#define T1_INTERNAL         0x85
#define T1_EXTERNAL         0x87
#define T1_EXTERNAL_SYNC    0x83

#define T1_CLK_OUT          8

#define T1_DIV_BY_1         0
#define T1_DIV_BY_2         0x10
#define T1_DIV_BY_4         0x20
#define T1_DIV_BY_8         0x30

I suspect the problem could be in this header file. Thanks for the help.
Wayne_



Joined: 10 Oct 2007
Posts: 681

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PostPosted: Fri Jul 09, 2010 1:54 am     Reply with quote
I suspect the problem is in how you are checking or displaying that the interrupt has fired!

How are you debugging this ?
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