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CHAPTER 2 DEPENDENCE FUNCTIONS
2.3.6.7 Reading Trace Data On-the-fly
Trace data can be read while executing a program. However, this is not possible during
sampling. Disable the trace function or terminate tracing before attempting to read trace
data.
■ Reading Trace Data On-the-fly
To disable the trace function, use the DISABLE TRACE command. Check whether or not the trace function
is currently enabled by executing the SHOW TRACE command with /STATUS specified, or by using the
built-in variable, %TRCSTAT.
Tracing terminates when the delay count ends after the sequencer has terminated. If Not Break is specified
here, tracing terminates without a break operation. It is possible to check whether or not tracing has
terminated by executing the SHOW TRACE command with /STATUS specified, or by using the built-in
variable, %TRCSAMP.
To read trace data, use the SHOW TRACE command; to search trace data, use the SEARCH TRACE
command. Use the SET DELAY command to set the delay count and break operation after the delay count.
[Example]
>GO
>>SHOW TRACE/STATUS
en/dis = enable
buffer ful = nobreak
sampling = on <- Trace sampling continues.
code : enable
verbose : disable
>>SHOW TRACE/STATUS
en/dis = enable
buffer full = nobreak
sampling = end <- Trace sampling ends.
code : enable
verbose : disable
frame no. = -00805 to 00000
>>SHOW TRACE -52
step no. address mnemonic time stamp
sort_val:
-00655 : FF00D2 LINK #0E 625
-00651 : 018253 external read access. 81 500
-00648 : 013254 external read access. 81 625
-00645 : 000186 internal write access. 0000 625
...
If the CLEAR TRACE command is executed with the trace ending state, trace data sampling can be re-
executed by re-executing the sequencer from the beginning.