Simulation Use Case 3: Verifying DTMF Algorithms

The DTMF project implements a DTMF detection algoritm for the NXP (founded by Philips) LPC2138 device.

The project contains three targets:

• Simulator for verification in the uVision simulator
• AutoTest for autmatic testing in the uVision simulator
• MCB2130 Flash for Flash Downloading and Target test

Review DTMF Input

Use View - Logic Analyzer Window to see the DTMF input that is generated on the AD00 input of the LPC2138 device.

Verify Code Execution

Applications require today a high-level of program verification and algorithm testing. With View - Code Coverage Window you may check that all paths of DTMF algorithm are executed. This is useful during program verification and  helps you even to identify redundant code in a program.

You may select the module that you want to verify. When you execute the various test DTMF patterns from the Toolbox, you will see that most of the algorithm is executed. You may open Editor or Disassembly windows to view the Code Coverage recording in detail.

Automated Testing

he AutoTest target can be invoked with the batch file AutoTest.BAT which starts the debug mode of uVision.  The debugger init file AutoTest.INI executes automatically the DTMF signal functions and creates a log file of the program execution.