Picaxe Versabot, Руководство пользователя

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3.5 Adding a buzzer
Now lets look at how the buzzer works. We will use the sound command to control the buzzer.
1. Connect the buzzer module to P2.
2. Now lets write a program that plays two different “tunes”
depending on whether the slide switch is at 0 or 1. The flow
diagram will look like this:
3. To program the buzzer, we will use the sound command. Let’s have a look at how the sound
command works. The sound command takes the general form:
SOUND pin,( note1\duration1, note2\duration2 ……noteX\durationX )
pin : this is the pin number that the buzzer is connected to (i.e. P2)
note : is a number between 1 and 127 that specifies the frequency of the note.
duration : this is a value between 1 and 65535 telling the buzzer how long to stay on the given
note for.
You can put together a series of notes to make a tune by specifying note length and note
frequency.
4. Start the Programming Editor or AXEpad , or start a new program by using the
File/New/Basic Program menu option.
Start
Is the
switch
1?
While the switch is
on 1, play tune 1
If the switch is
changed to 0
While the switch is
0, play tune 2
Yes
No