Sleep fix

include/pic/timer.h

@@ -34,4 +34,8 @@ union {
 
 void init_timer();
 
+double get_uptime();
+
+void sleep(double seconds);
+
 #endif

src/pic/timer.c

@@ -1,30 +1,45 @@
-
 #include <arch/io.h>
 #include <pic/timer.h>
 #include <pic/interrupts.h>
 
-int i = 0;
-int j = 0;
-void timer(struct interrupt_frame *frame) {
-    return;
+unsigned long ticks; // The amount of ticks that have passed
+int hz; // Self-Explanitory
+
+// Timer callback
+void timer(struct interrupt_frame * frame) {
+  ticks++;
+  return;
+}
+
+void sleep(double seconds) {
+  double to_wait = seconds + get_uptime();
+  while(to_wait != get_uptime());
 }
 
-void set_timer_phase(int hz) {
-    PIT_8254 cmd;
-    cmd.BCD = BCD_16_BIT;
-    cmd.mode = MODE_SQR_WAVE;
-    cmd.RW = RW_READ | RW_WRITE;
-    cmd.CNTR = 0;
-
-    outb(PIT_CMD, cmd.cmd);
-    int divisor = 1193180 / hz;
-    outb(PIT_CH0, divisor & 0xff);
-    outb(PIT_CH0, divisor >> 8);
+// Returns how many seconds the computer was awake
+double get_uptime() {
+  return ticks * (1 / hz);
+}
+
+void set_timer_phase() {
+  PIT_8254 cmd;
+  cmd.BCD = BCD_16_BIT;
+  cmd.mode = MODE_SQR_WAVE;
+  cmd.RW = RW_READ | RW_WRITE;
+  cmd.CNTR = 0;
+
+  outb(PIT_CMD, cmd.cmd);
+  int divisor = 1193180 / hz;
+  outb(PIT_CH0, divisor & 0xff);
+  outb(PIT_CH0, divisor >> 8);
 }
 
 void init_timer() {
-    set_timer_phase(20);
+  hz = 20;
+  secs = 0;
+  ticks = 0;
+  set_timer_phase();
 
-    set_interrupt_handler(0x20, &timer);
-    outb(PIC1_DATA, inb(PIC1_DATA)&~0x01);
+  set_interrupt_handler(0x20, & timer);
+  outb(PIC1_DATA, inb(PIC1_DATA) & ~0x01);
 }