- Omega 8 Channel Thermocouple USB Data Acquisition Module User's Guide

TC-08 User's Guide20

3.3.2.3

usb_tc08_open_unit_progress

short usb_tc08_open_unit_progress

(

short * handle,

short * progress

)

Call this function after usb_tc08_open_unit_async. Repeatedly call it to determine

the state of the background enumeration process. For an example of usage, see

usb_tc08_open_unit_async.

Arguments

handle

(Out) A handle (positive short) to the unit if the enumeration

is completed. Handle will always be 0 if the enumeration is

incomplete.

progress

(Out) (Optional - can pass NULL) returns a number from 0 to

100 representing the percentage completion of the

enumeration of one unit.

Returns

-1

USBTC08_PROGRESS_FAIL

An error occurred, call

usb_tc08_get_last_error with a

handle of 0 to obtain the error code.

USBTC08_PROGRESS_PENDING

Enumeration has not completed

(keep calling

usb_tc08_open_unit_progress).

USBTC08_PROGRESS_COMPLETE

Enumeration has completed and the

handle is now valid.