mirror of
https://gitlab.os-k.eu/os-k-team/os-k.git
synced 2023-08-25 14:03:10 +02:00
61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
//----------------------------------------------------------------------------//
|
|
// GNU GPL OS/K //
|
|
// //
|
|
// Desc: Speaker functions //
|
|
// //
|
|
// //
|
|
// Copyright © 2018-2019 The OS/K Team //
|
|
// //
|
|
// This file is part of OS/K. //
|
|
// //
|
|
// OS/K is free software: you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation, either version 3 of the License, or //
|
|
// any later version. //
|
|
// //
|
|
// OS/K is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
|
|
//----------------------------------------------------------------------------//
|
|
|
|
#include <kernel/speaker.h>
|
|
#include <kernel/iomisc.h>
|
|
#include <kernel/time.h>
|
|
|
|
void IoStartSpeaker(int freq)
|
|
{
|
|
char temp;
|
|
int pitf = 1193180 / freq;
|
|
|
|
IoWriteByteOnPort(0x43, 0xB6);
|
|
IoWriteByteOnPort(0x42, (char)pitf);
|
|
IoWriteByteOnPort(0x42, (char)(pitf >> 8));
|
|
|
|
temp = IoReadByteFromPort(0x61);
|
|
if (temp != (temp | 3)) {
|
|
IoWriteByteOnPort(0x61, temp | 3);
|
|
}
|
|
}
|
|
|
|
void IoQuietSpeaker(void)
|
|
{
|
|
IoWriteByteOnPort(0x61, IoReadByteFromPort(0x61) & 0xFC);
|
|
}
|
|
|
|
void IoDoBeep(void)
|
|
{
|
|
IoStartSpeaker(1000);
|
|
|
|
// Worst possible way of waiting
|
|
// We need actual timers
|
|
ulong ticks = IoGetRtcTicks();
|
|
while (IoGetRtcTicks() < ticks + 1024);
|
|
|
|
IoQuietSpeaker();
|
|
}
|
|
|