Ndudswritedatabyidentifier, Ndudswritedatabyidentifier -111 – National Instruments CAN 372139B-01 User Manual

Page 275

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Chapter 6

Automotive Diagnostic Command Set API for C

© National Instruments Corporation

6-111

Automotive Diagnostic Command Set User Manual

ndUDSWriteDataByIdentifier

Purpose

Executes the UDS WriteDataByIdentifier service. Writes a data record to the ECU.

Format

long ndUDSWriteDataByIdentifier(

TD1 *diagRef,

unsigned short ID,

unsigned char dataIn[],

long len,

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.

ID

Defines the identifier of the data to be read. The values are application specific.

dataIn

Defines the data record written to the ECU. If you know the record data description, use

ndConvertFromPhys

to generate this record.

len

Must contain the number of valid data bytes in

dataIn

.

Output

success

Indicates successful receipt of a positive response message for this diagnostic service.

Return Value

The return value indicates the function call status as a signed 32-bit integer. Zero means the
function executed successfully. A negative value specifies an error, which means the function
did not perform the expected behavior. A positive value specifies a warning, which means the
function performed as expected, but a condition arose that may require attention.

Use the

ndStatusToString

function to obtain a descriptive string for the return value.

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