National Instruments CAN 372139B-01 - Manual (Page 280)

Chapter 6 Automotive Diagnostic Command Set API for C
Automotive Diagnostic Command Set User Manual 6-116 ni.com
ndOBDRequestControlOfOnBoardDevice
Purpose
Executes the OBD Request Control Of On-Board Device service. Modifies ECU I/O port
behavior.
Format
long ndOBDRequestControlOfOnBoardDevice(
TD1 *diagRef,
unsigned char TID,
unsigned char dataIn[],
long len,
unsigned char dataOut[],
long *len2,
LVBoolean *success);
Input
diagRef
Specifies the diagnostic session handle, obtained from ndOpenDiagnostic and passed
to subsequent diagnostic functions. Normally, it is not necessary to manually manipulate
the elements of this struct.
TID
Defines the test identifier of the I/O to be manipulated. The values are application
specific.
dataIn
Defines application-specific data for this service.
len
Must contain the number of valid data bytes in dataIn .
Output
dataOut
Returns application-specific data for this service.
len2
On input, len2 must contain the dataOut array length. On return, it contains the number
of valid data bytes in the dataOut array.
success
Indicates successful receipt of a positive response message for this diagnostic service.