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| 101. |
What are these "invalid device" messages trying to tell me?
"COMM ERR: cannot open majic3 channel, invalid device name"
"ERROR: Invalid serial channel device name majic99"
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| Answer: |
The debugger thinks that you want to use a serial port, but
the name you provided is not a valid serial port name.
If you are trying to use a serial port, make sure the port
name is spelled correctly, and that the selected port is
available on your computer.
If you are trying to use ethernet, make sure to append
:e to the host name (or IP address).
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| 102. |
What does "CPU Unsupported" mean?
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| Answer: |
The MAJIC needs to know what type of processor you are
using in order to communicate with it. The processor type
is set with the -vXXXX switch on the debugger invocation
line (typically set in the program's shortcut).
Usually an unsupported CPU message means that the -v switch
is missing or misspelled.
Note: MONICE displays all of the CPU types that it supports
if -vH is specified. Bear in mind, though, that the MAJIC
series supports a subset of these processors.
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| |
| 103. |
What does "Reset operation failed" mean?
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| Answer: |
After attempting to reset the target processor, the MAJIC found the
processor in an unexpected state, and was unable to take control of it.
The error message text provides a clue to the failure mode, but since
there are many possible causes, it cannot identify the exact cause.
1. Many times, this is caused by an improper connection between
the MAJIC and the target system. Please be sure to check that
the JTAG cable is securely connected on both ends, and that it
is properly oriented.
2. Some processors begin executing their boot code when reset by MAJIC.
If a bug in the boot code or hardware locks up the processor
before the MAJIC can take control, then it may not be possible to
complete the reset operation successfully. Programming a branch-to-self
instruction at the reset vector, or maybe even just erasing the PROMs,
should avoid this situation.
3. If the program under test locks up the memory controller on your board,
then a processor reset may not clear the error. You may need to reset
the whole board with an RT command or your reset button in order to
regain control.
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| 104. |
What does "Software breakpoint converted to hardware breakpoint" mean?
|
| Answer: |
A software breakpoint is a special instruction that is written into the
program's code space. If a software breakpoint is set in non-writeable
memory, and a hardware breakpoint resource is available, the MAJIC will
automatically upgrade the software breakpoint to a hardware breakpoint and
display this warning message.
If you know that the breakpoint is in read-only memory, then you can
simply ignore this message. If you think that the breakpoint address is
in RAM, then this message usually means there is some problem in the
memory system or memory controller setup.
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| |
| 105. |
What does "The emulator experienced an internal failure" mean?
|
| Answer: |
This message means that an internal operation failed to complete.
Usually this is a second level failure; there should be one or
more messages preceeding this one to report the original problem.
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| |
| 106. |
What does "Static IP address setting will take effect after emulator is rebooted" mean?
|
| Answer: |
After setting or changing the static IP address, the MAJIC must
be rebooted by turning it off and then back on again. It is
best to quit the debugger first.
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| |
| 107. |
What does "At least one trace point has been detected" mean?
|
| Answer: |
If tracing is enabled on a MAJIC-Plus, this message is
displayed when the first Trace Point is reported by the
processor.
For MIPS processors, a trace point is a special type of hardware breakpoint.
For ARM processors, it's the ETM trigger.
If you get this message when there are no trace points set,
then there is probably a timing or signal quality problem
with the trace signals.
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| |
| 108. |
What does "JTAG operation failed--target disconnected or target power lost" mean?
|
| Answer: |
This message means that MAJIC detected loss of target power
just as it was initiating a JTAG operation. It means that the
target system was depowered, or that the JTAG cable is not
connected correctly.
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| |
| 109. |
What does "JTAG operation timed out" mean?
|
| Answer: |
This message means that MAJIC was unable to complete a JTAG
operation. This typically indicates an internal problem in
the MAJIC's JTAG controller. You should report this to EPI
technical support, with as much detail as possible about
what you were attempting to do. Please also run the
support.cmd file and send us the resultant support.out file.
Meanwhile, you may want to try slowing down the JTAG clock
or disabling it all together by setting the
Ice_Jtag_Clock_Freq option.
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| |
| 110. |
"Logical connection established to the only TAP on the JTAG chain"
|
| Answer: |
This message means that the MAJIC has successfully connected
to the processor's TAP controller (the 'state machine' part of
the JTAG interface) and has detected exactly one TAP controller
on the JTAG scan chain. Prior to this point, it is not possible
to access the processor under test.
|
| |
| 111. |
What does "Logical connection established
to TAP x of the y TAP JTAG chain" mean?
|
| Answer: |
This message is displayed after the Ice_Jtag_Tap_Select option
is set AND the MAJIC has successfully connected to the processor's
TAP controller (the 'state machine' part of the JTAG interface). Prior to
this point, it is not possible to access the processor under test.
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| |
| 112. |
What does "Warning: TAP x is already in use" mean?
|
| Answer: |
When working with a system that has a more than one TAP
controller (the 'state machine' part of the JTAG interface) on
the JTAG scan chain, the Ice_Jtag_Tap_Select option specifies
which TAP controller corresponds to the processor under test.
This message means that the specified TAP [controller] was
already selected in another debug session. The new debug
session cannot connect to this TAP [controller], and the other
debug session is unaffected.
Note: If a prior debug session was terminated without properly
disconnecting itself, then it is necessary to reboot the
MAJIC by cycling power to clear this condition.
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| |
| 113. |
What does "TAP x on the JTAG scan chain
has a surprisingly short IR of b bits" mean?
|
| Answer: |
This is a warning that a particular TAP controller
(the 'state machine' part of the JTAG interface) has an
instruction register width that is shorter than the JTAG
specification allows. The MAJIC will still attempt to use
the JTAG port, but this message usually indicates that there
is a problem on the JTAG interface, so the JTAG connection
may not be reliable.
If the JTAG connection has no further problems, you can
ignore this message. Otherwise, double check the JTAG cable
connection. If possible, verify that the target voltage is
within the MAJIC's operating range.
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| |
| 114. |
What does "TAP x on the JTAG scan chain has
an excessively long IR" mean?
|
| Answer: |
This is a warning that a particular TAP controller
(the 'state machine' part of the JTAG interface) has an
instruction register width that is wider than seems likely.
The MAJIC will still attempt to use the JTAG port, but this
message may indicate that there there is a problem on the
JTAG interface, so the JTAG connection may not be reliable.
If the JTAG connection has no further problems, you can
ignore this message. Otherwise, double check the JTAG cable
connection. If possible, verify that the target voltage is
within the MAJIC's operating range.
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| |
| 115. |
What does "Raw mode JTAG BYPASS test FAILED" mean?
|
| Answer: |
The BYPASS test is the JTAG version of a loopback test.
A test pattern is scanned through the JTAG chain to verify
basic JTAG connection. This message indicates that the test
failed, which means that the JTAG connection is non-functional.
Most often this is caused by not having the JTAG cable
connected correctly, so the first thing to check is that the
cable is correctly oriented and well-seated. Some boards have
jumpers or switches that control the JTAG connection, so you
should check that these are set correctly as well.
If possible, you should verify that the target's voltage is
within the MAJIC's operating range. You may also try
reinitializing the JTAG interface, by turning off the
Ice_Power_Sense option, and then turning it back on by
selecting the signal ( VREF, RST, or TRST ) which was
selected before.
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| |
| 116. |
What does "Illegal JTAG condition: 0 bit IR detected" mean?
|
| Answer: |
This message means that the JTAG connection is not working
correctly.
First, double check the JTAG cable connection.
If possible, verify that the target voltage is within the MAJIC's
operating range. You may also try reinitializing the JTAG
interface, by turning off the Ice_Power_Sense option, and then
turning it back on, by selecting the signal which selected before.
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| |
| 117. |
What does "Excessive stall condition has been detected" mean?
|
| Answer: |
This message is reported by a MAJIC-Plus if it detects that
the processor has stalled for more than 500 trace clock cycles.
It means that the acquisition of trace information has been
suspended due to the stalled condition.
If such stall conditions are normal in your system, then you
may want to disable the Trace_Gate option to ensure complete
trace information.
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| |
| 118. |
What does "Trace acquisition has been triggered" mean?
|
| Answer: |
This message means that the MAJIC-Plus trace control logic
has detected the specified trigger event, and has started to acquire
trace data. Note that the message is only displayed if a
trigger event is specified for the Trace_Trigger option,
not if Trace_Trigger is set to automatic mode.
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| |
| 119. |
What does "Trace acquisition stopped due to trigger event" mean?
|
| Answer: |
This message means that the MAJIC-Plus trace control logic has
detected the specified trigger event, and has consequently stopped
trace data acqusition. Note that the message is only displayed
if a trigger event is specified for the Trace_Trigger option,
not if Trace_Trigger is set to automatic mode.
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