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#include "Timer.class.h"
#include <DeviceManager/Dev.ns.h>
#include <DeviceManager/Time.ns.h>
using namespace Sys; //For outb
Timer::Timer(u8int frequency) {
m_ticks = 0;
m_seconds = 0;
Dev::requestIRQ(this, 0);
Time::setTimer(this);
setFrequency(frequency);
}
String Timer::getClass() {
return String("timer");
}
String Timer::getName() {
return String("Programmable interrupt timer");
}
void Timer::setFrequency(u8int frequency) {
m_frequency = frequency;
u32int divisor = 1193180 / (u32int)frequency;
outb(0x43, 0x36);
u8int l = (u8int)(divisor & 0xFF);
u8int h = (u8int)( (divisor >> 8) & 0xFF);
outb(0x40, l);
outb(0x40, h);
}
u32int Timer::uptime() {
return m_seconds;
}
u32int Timer::time() {
return (m_seconds * 1000) + ((m_ticks * 1000) / m_frequency);
}
void Timer::handleIRQ(registers_t registers, int irq) {
if (irq == 0) {
m_ticks++;
if (m_ticks == m_frequency) {
m_ticks = 0;
m_seconds++;
}
//Switching task is called in Dev::handleInterrupt
}
}
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