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25 lines
391 B
C
25 lines
391 B
C
/* 定时器 */
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#include "bootpack.h"
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#define PIT_CTRL 0x0043
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#define PIT_CNT0 0x0040
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struct TIMERCTL timerctl;
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void init_pit(void)
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{
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io_out8(PIT_CTRL, 0x43);
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io_out8(PIT_CNT0, 0x9c);
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io_out8(PIT_CNT0, 0x2e);
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timerctl.count = 0;
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return;
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}
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void inthandler20(int *esp)
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{
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io_out8(PIC0_OCW2, 0x60); /* 把IRQ-00信号接收完了的信息通知给PIC */
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timerctl.count++;
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return;
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}
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