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Applications Engineering
A.2.3 KD30 Already Exists
When a message ‘KD30 already exists’ is displayed, the usual cause of this problem is that the
KD30 application was not properly closed. Please unplug the USB cable first and wait a few
seconds. Then check if KD30 is already running by looking at your task bar. If KD30 cannot be
found there, bring up Task Manager (press CTRL-ALT-DEL once and click on ‘Task Manager’
button). Select KD30.exe on the ‘Processes’ list and click on ‘End Process’ to terminate KD30.
Then re-plug in the USB cable and restart KD30.
A.2.4 Issues that may come up During Debug Operations
While using KD30 to debug user code, some issues may come up because the limitations
discussed in section 6 were not satisfied. The common issues are listed on table A.2, including
the countermeasures.
Table A.2. Problems while using KD30
Problem Possible Cause/s and Solution
After stepping a few ? Changes were made to UART1 SFR’s. Do NOT change
instructions, KD30 hangs UART1 SFRs in user program.
Breakpoints do not seem to ? KD30 is in “FreeRun” mode. Change the RUN mode to
work “Sampling” from the “Init” window (Environment > Init).
KD30 locks up (cannot stop ? Changes were made to UART1 SFR’s. Do NOT change
program) or UART1 SFRs in user program.
Communication error ? Ensure no limitations in Section 6 were violated.
message is displayed. ? Re-initialize the system without closing KD30. See note
below.
? Do a hardware reset. User-program runaway may be
corrupting the kernel (RAM, interrupt vectors, flags, etc.)
Close KD30, hit reset button on the SKP16C26A to reset the
board, and then restart KD30.
Download problems ? Filenames or directory names contain spaces or special
characters.
? HEW project not properly set up (startup files missing or out
of order, files added to wrong member, etc). Try creating a
new project and adding your source files to it. For details,
please see HEW user’s manual.
To re-initialize the system without closing KD30, try the following:
?
?
?
?
Press the [OK] button on the error dialog box to close it.
When an Exit dialog box appears, press the [Cancel] button to close it.
Hit reset button on the SKP16C26A board.
Press KD30 reset button.
After initialization, debugging can resume. However, it is recommended that you download your
program again before debugging.
Note: If it has been identified that there are problems with the ICD, please see the ICD’s (RTA-
FoUSB-MON) user’s manual and troubleshooting section of this manual.
SKP16C26A User’s Manual Rev. 1.0
16 / 21
June 2004
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