speaker.c File Reference

#include "devices/speaker.h"
#include "devices/pit.h"
#include "threads/io.h"
#include "threads/interrupt.h"
#include "devices/timer.h"

Include dependency graph for speaker.c:

Go to the source code of this file.

Macros
#define	SPEAKER_PORT_GATE   0x61
	Speaker port enable I/O register. More...
#define	SPEAKER_GATE_ENABLE   0x03
	Speaker port enable bits. More...

Functions
void	speaker_on (int frequency)
	Sets the PC speaker to emit a tone at the given FREQUENCY, in Hz. More...
void	speaker_off (void)
	Turn off the PC speaker, by disconnecting the timer channel's output from the speaker. More...
void	speaker_beep (void)
	Briefly beep the PC speaker. More...

Macro Definition Documentation

SPEAKER_GATE_ENABLE

#define SPEAKER_GATE_ENABLE   0x03

Speaker port enable bits.

Definition at line 11 of file speaker.c.

SPEAKER_PORT_GATE

#define SPEAKER_PORT_GATE   0x61

Speaker port enable I/O register.

Definition at line 8 of file speaker.c.

Function Documentation

speaker_beep()

void speaker_beep

(

void

)

Briefly beep the PC speaker.

devices/speaker.h

Definition at line 48 of file speaker.c.

References intr_get_level(), INTR_ON, speaker_off(), speaker_on(), and timer_msleep().

Referenced by vga_putc().

Here is the call graph for this function:

Here is the caller graph for this function:

speaker_off()

void speaker_off

(

void

)

Turn off the PC speaker, by disconnecting the timer channel's output from the speaker.

Definition at line 39 of file speaker.c.

References inb(), intr_disable(), intr_set_level(), outb(), SPEAKER_GATE_ENABLE, and SPEAKER_PORT_GATE.

Referenced by speaker_beep(), and speaker_on().

Here is the call graph for this function:

Here is the caller graph for this function:

speaker_on()

void speaker_on

(

int

frequency

)

Sets the PC speaker to emit a tone at the given FREQUENCY, in Hz.

Definition at line 16 of file speaker.c.

References inb(), intr_disable(), intr_set_level(), outb(), pit_configure_channel(), SPEAKER_GATE_ENABLE, speaker_off(), and SPEAKER_PORT_GATE.

Referenced by speaker_beep().

Here is the call graph for this function:

Here is the caller graph for this function: