Generate sawtooth waves?

[Ramses]

Hi!

 i am actually working on a signal generator based on a raspberry board, actually with "uos" i have generated sinusoidal and square wave, but now i need to generate sawtooth waves, is there any way to generate that with UOS, or maybe with other library?

Thanks!

[Ramses]

Finally, i found an answer by myself: i can generate sawtooth signal with "alsa_sound"

So you can consider this thread as closed. 

[CM630]

Well, posting some sample code would not hurt.

[lucamar]

A simple search for "generate wave" in this forum gives inmediattely this thread: Generate square / sinusoidal waves (started by the same OP as this one) where wave generation is quite thoroughly discussed and some examples pointed out.

You can also find some examples/links to info in the wiki. Starting form the Game Development might be a good idea.

[Ramses]

Well, posting some sample code would not hurt.

Sure, here is an exemple that work :

Code: Pascal  [Select][+][-]

1. unit Unit1;
2.  
3. {$mode objfpc}{$H+}
4.  
5. interface
6.  
7. uses
8.   Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls,alsa_sound;
9.  
10. type
11.  
12.   { TForm1 }
13.  
14.   TForm1 = class(TForm)
15.     Button1: TButton;
16.     procedure Button1Click(Sender: TObject);
17.   private
18.  
19.   public
20.  
21.   end;
22.  
23. var
24.   Form1: TForm1;
25.  
26. implementation
27.  
28. {$R *.lfm}
29.  
30. { TForm1 }
31.  
32. procedure TForm1.Button1Click(Sender: TObject);
33. begin
34.  
35.   //function ALSAbeep(frequency, duration, volume: cint; warble: Boolean;
36.   //WaveType: cint; CloseLib : boolean): Boolean; // WaveType: 0=sine, 1=square, 2=tooth
37.  
38.   ALSAbeep(40, 10000, 100, true,2, true);
39. end;
40.  
41. end.
42.                
43.