speaker.h File Reference

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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)
	devices/speaker.h More...

Function Documentation

speaker_beep()

void speaker_beep

(

void

)

devices/speaker.h

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().

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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().

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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().

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