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Timer5 Period Match with PICC

 
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mah115
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Timer5 Period Match with PICC
PostPosted: Thu Oct 30, 2008 10:05 am     Reply with quote
Hello,
I'm trying to use PIC C with the PIC18F4431, and I'm trying to make the PIC generate an interrupt on a TIMER5 period match. However, the setup_timer_5(MODE,PERIOD) function won't work, only the setup_timer_5(MODE) works. This means I can't set the period match register, when I should be able to.

I also tried writing directly to the memory location of PR5, but that doesn't work either. Anyone know how to set the period match register?
Code:
 
   int* PR5L;
   int* PR5H;
   PR5L = 0x70;
   PR5H = 0x71;
   *PR5H = 100/256;
   *PR5L = 100%256;
RLScott



Joined: 10 Jul 2007
Posts: 465

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Re: Timer5 Period Match with PICC
PostPosted: Thu Oct 30, 2008 10:23 am     Reply with quote
Code:

#byte PR5L=0x70
#byte PR5H=0x71 
 . . .
  PR5H = 100/256;
  PR5L = 100%256;

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Robert Scott
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Embedded Systems Consulting
Ttelmah
Guest
PostPosted: Thu Oct 30, 2008 10:36 am     Reply with quote
However, read the data sheet.
The timer5 registers are at 0xF87, and 0xF88, not 70 and 71.

Best Wishes
Guest
PostPosted: Thu Oct 30, 2008 11:36 am     Reply with quote
Ttelmah wrote:
However, read the data sheet.
The timer5 registers are at 0xF87, and 0xF88, not 70 and 71.

Best Wishes


Ah, good catch. PR5 is actually 0x90 and 0x91; I was reading the wrong column.
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