Once the DOS Loader files have been created
and loaded on to the CF disc, insert it into the
PC104 board’s CF flash slot and boot it up.
When the board is ready, go to xPC Explorer.
You should see a .dlm file with the name of
the model you created (this will only happen if
the current working folder in MATLAB is set
to the one where you saved your model file).
Right click on “TargetPC1” and click
“connect”. At this point, xPC Explorer knows
how to communicate with the board (the red
cross mark on the icon should go away). Next
right click on the model that you want to
download and select “Download to Target
TargetPC1”.
Wait for a while and you should see the
experiment file listed under the TargetPC1
tree. This means the file has been
successfully downloaded to the PC104
board. Right click on the experiment file
under TargetPC1 and click run. You should
see the waveform on the monitor connected
to the PC104. In MATLAB command
window type the command
>>xpctargetspy
Save the screen shot of the output from
PC104 for your report.
Repeat experiment 1.2 with DOS Loader but this time with TCP/IP communication as shown in step
2.2.b. Remember, after setting up the DOS Loader for Ethernet communication you need to build and
reload the new DOS Loader files on to the flash disk. Then use the same process to download the file as
you did when using RS-232.
NOTE: The first time you try to connect to a PC104 using TCP/IP, you may not be able to communicate
with the board. To fix this, on your desktop, go to Start> Run then type “cmd” and press enter. In the
DOS command prompt type “ping 129.219.24.xxx” (xxx being the number of the board you are trying to
connect to). If you get a response, go back to xPC Explorer and try to connect again.
Repeat the experiment by decreasing sampling time by a factor of 10. For every sampling time, record the
average TET against sample time in a table for your report.
Record the lowest sampling time before which the PC104 stops working.
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