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72 lines
2.1 KiB
COBOL
72 lines
2.1 KiB
COBOL
#pypp 0
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// Iris: micro-kernel for a capability-based operating system.
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// boot-programs/metronome.ccp: Userspace program.
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// Copyright 2009 Bas Wijnen <wijnen@debian.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "devices.hh"
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#include "keys.hh"
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Kernel::Num start ():
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kdebug ("metronome started\n")
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Buzzer buzzer = Kernel::my_parent.get_device <Buzzer> ()
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Keyboard kbd = Kernel::my_parent.get_device <Keyboard> ()
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Kernel::Cap key = Kernel::my_receiver.create_capability (0)
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kbd.set_cb (key)
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// Frequency of the pulse train in millihertz.
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unsigned mHz = 1000
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// Frequency of single pulses in hertz.
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unsigned freq = 1000
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bool running (false)
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while true:
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Kernel::wait ()
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switch Kernel::recv.protected_data.l:
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case ~0:
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if running:
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buzzer.beep (freq, 10, ~0)
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Kernel::my_receiver.set_alarm (HZ * 1000 / mHz)
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break
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case 0:
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if Kernel::recv.data[0].l & Keyboard::RELEASE:
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break
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switch Kernel::recv.data[0].l:
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case Key::VOLUME_UP:
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freq = freq * 11 / 10
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break
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case Key::VOLUME_DOWN:
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freq = freq * 9 / 10
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break
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case Key::LEFT:
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mHz = mHz * 99 / 100
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break
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case Key::RIGHT:
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mHz = mHz * 101 / 100
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break
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case Key::UP:
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mHz = mHz * 11 / 10
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break
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case Key::DOWN:
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mHz = mHz * 9 / 10
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break
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case Key::P:
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running = !running
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if running:
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Kernel::my_receiver.set_alarm (0)
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break
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break
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default:
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kdebug ("huh?\n")
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break
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