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problem with the pic http://forums.osdever.net/viewtopic.php?f=4&t=215 |
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Author: | Sharpner [ Thu Mar 11, 2010 11:52 am ] |
Post subject: | problem with the pic |
Hi! I somehow have a strange problem that I' dont understand... I'm trying to enable the timer.. the code is from brans tutorial but somehow it raises no interrupt.. in my case freq = 100; Code: void init_timer(int32u freq){ int32u divisor = 1193180 / freq; int8u l = (int8u)(divisor & 0xFF); int8u h = (int8u)( (divisor>>8)); outportb(0x43, 0x36); outportb(0x40,l); outportb(0x40,h); kprintf("Timer initialized! Low: %h High: %h Total: %h", l, h, divisor); } this is my code.... I also tried: Code: int8u h = (int8u)( (divisor>>8) & 0xFF); and this is the output: Timer initialized! Low: 00000037 High: 0000005D Total: 00005D37 so this seems correct... any ideas? |
Author: | Primis [ Tue Jul 06, 2010 12:33 pm ] |
Post subject: | Re: problem with the pic |
Two things, 1. Do you have a working printf function? 2. Did you register a function in the IDT to handle the interrupt? In my case I have a function called timerHandler() that increments a variable called tick. |
Author: | Sharpner [ Fri Jul 09, 2010 12:58 am ] |
Post subject: | Re: problem with the pic |
thanks for your answer. I already got it working, I just forgot to enable interupts after the setup of my own table... bye Sharpner |
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