New Usb Mode And Legacy Mode - Omega Engineering 8 Channel Thermocouple USB Data Acquisition Module TC-08 User Manual

3.3.2

New USB mode and legacy mode

3.3.2.1 usb_tc08_open_unit
short usb_tc08_open_unit (void)
This routine returns a valid handle to the USB TC-08 if the driver successfully opens it.
If the routine fails, see the error code explanations in the
section. If you wish to use more than one USB TC-08, call this routine once for each
unit connected to the PC. The function will return 0 if there are no more units found.
The driver is thread-safe and will not allow access to a single unit from more than one
application. If, therefore,
other applications are not using the USB TC-08. This includes applications on other
user accounts on the same computer, where fast user switching is supported.
Note: The
usb_tc08_open_unit
units. However, the function call locks up the calling thread until the attached USB
TC-08 unit has been fully enumerated. If a single-threaded application needs to
perform concurrent processing, such as displaying a progress bar, use
usb_tc08_open_unit_async.
Arguments
usb_tc08_open_unit
None
does not find a unit, check that
function provides a simple way to open USB TC-08
Technical reference
usb_tc08_get_last_error
15