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mah115
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| Timer5 Period Match with PICC |
 Posted: Thu Oct 30, 2008 10:05 am |
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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;
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RLScott
Joined: 10 Jul 2007
Posts: 465
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| Re: Timer5 Period Match with PICC |
| Posted: Thu Oct 30, 2008 10:23 am |
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| Code: |
#byte PR5L=0x70
#byte PR5H=0x71
. . .
PR5H = 100/256;
PR5L = 100%256;
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_________________
Robert Scott
Real-Time Specialties
Embedded Systems Consulting |
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Ttelmah
Guest
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| Posted: Thu Oct 30, 2008 10:36 am |
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However, read the data sheet.
The timer5 registers are at 0xF87, and 0xF88, not 70 and 71.
Best Wishes |
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Guest
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| Posted: Thu Oct 30, 2008 11:36 am |
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| 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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