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22 lines
890 B
Markdown
22 lines
890 B
Markdown
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Everything is now ready to test our hardware interrupts.
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Timer
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-----
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The timer is easy to configure. First we'll declare an `init_timer()` on `cpu/timer.h` and
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implement it on `cpu/timer.c`. It is just a matter of computing the clock frequency and
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sending the bytes to the appropriate ports.
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## se printa gibberish, pq? mirar primero si se arregla con un kprint_int
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## yo tenia una funcion que printaba enteros??!!! pero al rever. hacerla ahora bien y
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## en el proximo episodio limpiar codigo y crear una libc
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Finally, go back to the `kernel/kernel.c` and do two things. Enable interrupts again
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(very important!) and then initialize the timer interrupt.
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Go `make run` and you'll see the clock ticking! Unfortunately we are not printing the correct values
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on screen, so we'll go ahead to `drivers/screen.c` and add a new `kprint_int()` method, also declaring
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it on `drivers/screen.h`
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