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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Text; | ||
| using Sys = Cosmos.System; | ||
| using System.Threading; | ||
|
|
||
| namespace BeepDemo | ||
| { | ||
| public class Kernel: Sys.Kernel | ||
| { | ||
| protected override void BeforeRun() | ||
| { | ||
| Console.WriteLine("Cosmos booted successfully. Type a line of text to get it echoed back."); | ||
| } | ||
| protected override void Run() | ||
| { | ||
| Console.WriteLine("Run 'Mary Had a Little Lamb'? "); | ||
| string ans = Console.ReadLine(); | ||
| if (ans.ToLower() == "y" || ans.ToLower() == "yes") | ||
| { | ||
| BeepTest.Main(); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("Default beep:"); | ||
| Console.Beep(); | ||
| // Does the follwing: Console.Beep((int)Sys.Notes.Default (800 hertz), (int)Sys.Durations.Default (200 milliseconds) ); | ||
| } | ||
| } | ||
| } | ||
| class BeepTest | ||
| { | ||
| public static void Main() | ||
| { | ||
| // Declare the first few notes of the song, "Mary Had A Little Lamb". | ||
| Note[] Mary = | ||
| { | ||
| new Note(Tone.B, Duration.QUARTER), | ||
| new Note(Tone.A, Duration.QUARTER), | ||
| new Note(Tone.GbelowC, Duration.QUARTER), | ||
| new Note(Tone.A, Duration.QUARTER), | ||
| new Note(Tone.B, Duration.QUARTER), | ||
| new Note(Tone.B, Duration.QUARTER), | ||
| new Note(Tone.B, Duration.HALF), | ||
| new Note(Tone.A, Duration.QUARTER), | ||
| new Note(Tone.A, Duration.QUARTER), | ||
| new Note(Tone.A, Duration.HALF), | ||
| new Note(Tone.B, Duration.QUARTER), | ||
| new Note(Tone.D, Duration.QUARTER), | ||
| new Note(Tone.D, Duration.HALF) | ||
| }; | ||
| // Play the song | ||
| Play(Mary); | ||
| } | ||
|
|
||
| // Play the notes in a song. | ||
| protected static void Play(Note[] tune) | ||
| { | ||
| foreach (Note n in tune) | ||
| { | ||
| if (n.NoteTone == Tone.REST) | ||
| { | ||
| Thread.Sleep((int)n.NoteDuration); | ||
| } | ||
| else | ||
| { | ||
| Console.Beep((int)n.NoteTone, (int)n.NoteDuration); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Define the frequencies of notes in an octave, as well as | ||
| // silence (rest). | ||
| protected enum Tone | ||
| { | ||
| REST = 0, | ||
| GbelowC = 196, | ||
| A = 220, | ||
| Asharp = 233, | ||
| B = 247, | ||
| C = 262, | ||
| Csharp = 277, | ||
| D = 294, | ||
| Dsharp = 311, | ||
| E = 330, | ||
| F = 349, | ||
| Fsharp = 370, | ||
| G = 392, | ||
| Gsharp = 415, | ||
| } | ||
|
|
||
| // Define the duration of a note in units of milliseconds. | ||
| protected enum Duration | ||
| { | ||
| WHOLE = 1600, | ||
| HALF = WHOLE / 2, | ||
| QUARTER = HALF / 2, | ||
| EIGHTH = QUARTER / 2, | ||
| SIXTEENTH = EIGHTH / 2, | ||
| } | ||
|
|
||
| // Define a note as a frequency (tone) and the amount of | ||
| // time (duration) the note plays. | ||
| protected struct Note | ||
| { | ||
| Tone toneVal; | ||
| Duration durVal; | ||
|
|
||
| // Define a constructor to create a specific note. | ||
| public Note(Tone frequency, Duration time) | ||
| { | ||
| toneVal = frequency; | ||
| durVal = time; | ||
| } | ||
|
|
||
| // Define properties to return the note's tone and duration. | ||
| public Tone NoteTone { get { return toneVal; } } | ||
| public Duration NoteDuration { get { return durVal; } } | ||
| } | ||
| } | ||
| /* | ||
| This example produces the following results: | ||
| This example plays the first few notes of "Mary Had A Little Lamb" | ||
| through the computer PC Speaker. | ||
| */ | ||
| } |
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