User`s guide

B Reported Limitations and Tips
Issues Using USB
-Based RTDX Emulators a nd the
C6416 DSK and C67
13 DSK
You may encounte
r a few problems when you try to use the USB-based RTDX
emulators with t
he C6713 and C6416 DSP Starter Kits. The problems relate
to setting up RT
DX and opening/closing RTDX channels.
1 Setting up and c
leaning up RTD X.
If you do not set up RTDX correctly, your hardware might end up in a bad
state and RTDX data transfers may not work correctly. Rerunning the
application without setting up RTDX properly yields the same result. To
bring the hardware back to a working state,youhavetorecyclepowerto
your board. Likewise, if RTDX is not cleaned up correctly after running an
application, your hardware can go into a bad state.
2 When you close and reopen CCS for DS P Starter Kit for TMS320C6416 or
DSP Starter Kit for TMS320C6713, you have to adhere to the two second
close and reopen requirement as noted in TI documentatio n.
In the Quick
Start Installation G uide, under “Debug Hints and Trouble
Shooting,”
item 6 states
“The LED above the USB connector illuminates when the DSK is powered on. Do not
start Code Composer S tudio until the LED turns off.”
When your CCS application terminates, the USB bus is nonenumerated. It
takes a few seconds (roughly two s econds in Windows X P) to enumerate
the USB bus a gain.
Consequen
tly, although the CCS application may appear to have gone
away from t
he desktop, there can still be some processes running. You
should fo
llow the above guidelines when communicating with a C6416
DSK, C671
3 DSK , or XDS510USB on a close and reopen sequence.
References
The infor
mation in this discussion comes from the following TI publications —
dsk6416_
releasenotes.htm
and dsk6713_releasenotes.htm
• Section 3
.0 Installation
B-4