Data Translation DT9835, Руководство пользователя

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Chapter 4
32
Continued from previous page.
Stop the operation
(see page 33 ).
Clean up the operation
(see page 34 ).
Configure the subsystem using
olDaConfig.
Start the operation with olDaStart.
Get event
done
message?
Yes
No
The event done message is OLDA_WM_EVENT_DONE. In
olDaSetWndHandle or olDaSetNotificationProcedure, the
subsystem handle, HDASS, is returned in the
wParam
parameter; this allows one window to handle messages from both
subsystems. The subsystem status is returned in the
IParam
parameter.
Table 3: Subsystem Status in IParam
Bits Definition
High
Word State of the subsystem.
The resolution reflects the number of
significant bits and represents actual line
states read from the board.
Low
Word DIO lines (bits) which caused the event.
Bit 0 corresponds to subsystem’s bit 0.
Bit 1 corresponds to subsystem’s bit 1,
and so on.
Resolution reflects the # of significant bits.
Process data.