Freescale Semiconductor

DTMF Generation Example Application for 56F82x

Overview

The DTMF Generation Demo, which runs on the DSP56F827EVM, involves entering keys through a

keyboard, and dialing the phone with corresponding numbers.

The demo set-up uses a serial cable to connect a PC to the DSP56F827EVM board. The user types the DTMF

characters through a HyperTerminal. The execution of the DTMF Generation algorithm generates the

audible tones, which can be heard through a speaker or used to actually dial the phone.

How to get this software

This example application is included as part of the CodeWarrior Development Studio for 56800/E Digital

Signal Controllers. Follow these steps:

1.

Install CodeWarrior Development Studio for 56800/E Digital Signal Controllers

2.

Launch CodeWarrior, and create new Processor Expert project

a.

Select File > New menu

b.

Select Processor Expert Examples Stationery

c.

Type project name

d.

Click OK

e.

Select DemoApplications > Telephony > DTMFGen > 56f827

f.

Click OK

3.

Generate application code by selecting Processor Expert > Generate Code menu

Detailed documentation

Documentation for this application is included as part of this example project. Expand Doc folder located

in the project window by clicking on the + icon next to the folder, and open desired file by double clicking it.

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