Omega Engineering 8 Channel Thermocouple USB Data Acquisition Module TC-08 User Manual page 22

18 TC-08 User's Guide
3.3.2.2 usb_tc08_open_unit_async
short usb_tc08_open_unit_async (void)
This routine begins enumerating USB TC-08 units in the background and provides a
return immediately, so the calling thread can continue executing other code.
Note: The driver is thread safe and will not allow access to a single unit from more
than one application. If, therefore,
unit, check that other applications are not using the same USB TC-08. This includes
applications on other user accounts on the same computer, where fast user switching
is supported.
Arguments
Returns
None
1
The call was successful.
0
No more units were found.
-1
An error occurred, call
handle of 0 to obtain the error code.
usb_tc08_open_unit_async
usb_tc08_get_last_error
does not find a
with a