Added pcspk.h for PC Speaker and notes.h that contains notes and their frequencies

include/sound/pcspk.h

@@ -0,0 +1,32 @@
+#ifndef PCSPK_H
+#define PCSPK_H
+
+#include <stdint.h>
+#include <sound/notes.h>
+#include <interrupt/pit.h>
+#include <ports/io.h>
+#include <time.h>
+
+#define PC_SPEAKER 0x61
+
+void enableSpeaker() {
+    uint8_t temp = inb(PC_SPEAKER);
+    outb(PC_SPEAKER, temp | 0x03); // Set first 2 bits
+}
+
+void disableSpeaker() {
+    uint8_t temp = inb(PC_SPEAKER);
+    outb(PC_SPEAKER, temp & 0xfc); // Set first 2 bits
+}
+
+void playNote(note_t note, uint32_t ms) {
+    setPitPhase(2, 3, note);
+    sleep(ms);
+}
+
+void rest(uint32_t ms) {
+    setPitPhase(2, 3, 30000); // Unhearable noise
+    sleep(ms);
+}
+
+#endif