forked from PoliEcho-holding-org/kern
34 lines
998 B
C
34 lines
998 B
C
#include <drivers/timer.h>
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#include <memory/addresses.h>
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#include <screen/tty.h>
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#include <cpu/system.h>
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#include <cpu/isr.h>
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#include <stdint.h>
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void timerHandler(intFrame_t*) {
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static uint32_t cursorTicks = 0;
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cursorTicks++;
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if (!console->hideCursor) { // TODO: Make a better cursor drawing thing
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if (cursorTicks % 500 == 0) toggleCursor();
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}
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if (*(uint32_t*)SLEEP_TIMER > 0) { --(*(uint32_t*)SLEEP_TIMER); }
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}
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void setPitPhase(uint8_t channel, uint8_t opMode, uint16_t hz) {
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if (channel > 2 || opMode > 7) { return; }
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__asm__ volatile ("cli");
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// Send command - bits 7-6 channel, 5-4 Access mode, 3-1 operating mode, 0 - Should be zero in x86
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outb(COMMAND, ((channel << 6) | (3 << 4) | (opMode << 1)));
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// Send frequency
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uint16_t freq = INPUT_CLK / hz; // I solved an equation to figure this out
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outb(CHANNEL_0 + channel, (uint8_t)freq);
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outb(CHANNEL_0 + channel, (uint8_t)(freq >> 8));
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__asm__ volatile ("sti");
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}
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