DSP Interface
4-7
Getting the Most From Your EVM
J
DSP Data Type: Select 16−bit signed integer from the drop−down list,
as the ADS1605 is a 16−bit converter
J
Sampling Rate (Hz): This field contains the sampling frequen-
cy for acquisition buffer samples, such as for analog to digital
conversion. The sampling rate is used to calculate the time and
frequency values displayed on the graph. For a time domain
graph, this field calculates the values for the time axis. The axis
is labeled from 0 to (Display Data Size
×
1/Sampling Rate). For
the sample program, set it to 5000000 (5 MHz).
More information on the different settings can be found in the help file
of Code Composer Studio.
Once all settings are entered, click on the OK button to close the dialog.
The graph window appears, currently with no useful values, as the
program has not started yet.
Figure 4−6. CCS Graph Property Windows
-
Start the program by hitting the <F5> key on your keyboard. After a short
period of time, the graph window should be updated to show the waveform
of the analog signal (see Figure 4−7).
