ADLINK Technology PCI-8366+, User Manual

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92 Operation Theory
The first parameter ‘Axis’ specifies which axis. The remaining four
parameters are used to retrieve monitoring data from the monitor-
ing channels.
This function returns a value immediately and carries out real time
monitoring of specified monitoring targets.
2. Normal monitoring
Normal monitoring is data sampling with the help of the on-board
DSP. The DSP take charge of storing all sampled data according
to configuration set by set_monitor_config(). The following steps
are necessary to operate in normal monitoring.
Step 0: Set monitor channel and configuration using function call:
set_monitor_channel(), set_monitor_config()
Step 1: Start normal monitoring using the function call:
start_monitor(). This will start the DSP.
Step 2: Check if the monitoring has completed by calling the func-
tion: check_monitor_ready(). The parameter ‘status’ returns
a value, if the monitoring process has completed.
Step 3: If monitoring has completed, then call get_monitor_data() to
retrieve the monitored data.
The size of the ‘data’ array of the function get_monitor_data(),
which is used to read the monitored data must be 4 times the
value of ‘PreTriggerSampleNo’ in set_monitor_config() and when
the function get_monitor_data() returns a value, the ‘data’ is stored
in the following format.