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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 | ) |
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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