28123 Parallax Inc, 28123 Datasheet - Page 242

• Manufacturer Part Number: 28123
• Description: TEXT WHAT'S A MICROCONTROLLER
• Manufacturer: Parallax Inc
• Type: Programmingr

Specifications of 28123

• Style: Book
• Title: What's a Microcontroller?
• Contents: Whats a Microcontroller? Text
• Product: Microcontroller Accessories
• Core Processor: PIC16C57c
• Flash: 128 Bytes
• Operating Supply Voltage: 9 V
• Board Size: 31 mm x 16 mm
• Lead Free Status / RoHS Status: Not applicable / Not applicable

WholeNote
The first number in the
note in the
and so on. The durations are no longer in terms of milliseconds. Instead, they are much
smaller numbers that can be stored in bytes, so there is no
directive. Compared to storing values in terms of milliseconds, these numbers are more
closely related to sheet music. Here is a list of what each duration means.
After each value is read from the
WholeNote
time each note lasts depends on the tempo of the song. A faster tempo means each note
lasts for less time, while a slower tempo means each note lasts longer. Since all the note
durations are fractions of a whole note, you can use the duration of a whole note to set the
tempo.
Example Program: NotesAndDurations.bs2
' What's a Microcontroller - NotesAndDurations.bs2
•
•
•
•
•
•
√
√
1 – whole note
2 – half note
4 – quarter note
8 – eighth note
16 – sixteenth note
32 – thirty-second note
Enter and run NotesAndDurations.bs2.
How does it sound?
What does the "
checks for "Q" each time through the loop.
How do I play a rest? You can insert a rest between notes by inserting a
Turn section has the first few notes from Beethoven’s 5
How do I play sharp/flat notes? NotesAndDurations.bs2 has values in its lookup tables for
sharp/flat notes. When you use the lower-case version of the note, it will play the flat note.
For example, if you want to play B-flat, use “b” instead of “B”. Remember that this is the
same frequency as A-sharp.
Notes Data
value to get the
CON
directive should last. The second duration is for the second note,
Durations DATA
Q
" in
Duration
Notes DATA
2000
Durations DATA
used in the
directive tells the program how long the first
mean? "Q" is for quit, and a
FREQOUT
directive, it is divided into the
th
Symphony, which has a rest in it.
command. The amount of
Word
prefix in the
DO WHILE…LOOP
"P"
. The Your
DATA