
5.2. WINDSK DEMONSTRATION 93
(a) 12-keys (b) 16-keys
Figure 5.8: winDSK running the DTMF application.
periodic signal generation. Of course square and triangle waves are also periodic signals.
5.2.2 DTMF
Clicking on the winDSK DTMF button will load and run that program into the attached
DSK, and a 12-keypad window similar to Figure 5.8(a) will appear by default. Clicking
on the “16-keys” button will add a fourth column to the keypad display as shown in Fig-
ure 5.8(b).
This application generates standard Dual-Tone, Multiple-Frequency (DTMF) signals as
defined by telephone companies. These are signals that consist of two sinusoids of different
frequencies ...