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https://github.com/RGBCube/serenity
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f4cec2f110
Also tweak the kernel's Makefile to use -nostdinc and -nostdinc++. This prevents us from picking up random headers from ../Root, which may include older versions of kernel headers. Since we still need <initializer_list> for Vector, we specifically include the necessary GCC path. This is a bit hackish but it works for now.
20 lines
497 B
C++
20 lines
497 B
C++
#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Arch/i386/PIT.h>
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#include <Kernel/Devices/PCSpeaker.h>
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#include <Kernel/IO.h>
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void PCSpeaker::tone_on(int frequency)
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{
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IO::out8(PIT_CTL, TIMER2_SELECT | WRITE_WORD | MODE_SQUARE_WAVE);
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u16 timer_reload = BASE_FREQUENCY / frequency;
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IO::out8(TIMER2_CTL, LSB(timer_reload));
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IO::out8(TIMER2_CTL, MSB(timer_reload));
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IO::out8(0x61, IO::in8(0x61) | 3);
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}
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void PCSpeaker::tone_off()
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{
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IO::out8(0x61, IO::in8(0x61) & ~3);
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}
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