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01/26/2006: "RTDX Interfacing and Testing III"

Now that the Matlab testing interface was verified using the testing program, the next step is to design the testing software for the DSP side of the board.

The testing software for the DSP board has 3 parts; initialization, data receiving, and data sending. The DSP board timer controls the execution of the Software Radio processing. The timer is disabled when waiting to receive, receiving, and sending data because there is no software radio data processing that needs to be done at these locations. Also, the simulink program is set to abort on an “overrun.” Although this is supposed to be able to be disabled from the “Configuration Parameters” dialog in Simulink.

To test the testing interface, the following simulink block diagram program was created.

Figure 1 - Test program for the simulink interface

This interface was then compiled and downloaded on the board. When working it gives the following response:

Press return to try again. Type exit and return to exit:
Test Message: Test message 1

msg =

Test message 1

Message sent, waiting 5 seconds for it to return

num_msg =

1


outdata =

Test message 1

Press return to try again. Type exit and return to exit:


This is the output of the matlab program. Since the same data coming out is what is going in, the program is working successfully.

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