Output, Description – National Instruments CAN 372139B-01 User Manual
Page 178
Chapter 6
Automotive Diagnostic Command Set API for C
Automotive Diagnostic Command Set User Manual
6-14
ni.com
Output
dataOut
Points to the byte array to be filled with the binary representation of
value
.
len
On input,
len
must contain the
dataOut
array length. On return, it contains the number
of valid data bytes in the
dataOut
array.
Description
Data input to diagnostic services (for example,
usually a byte array of binary data. If you have the data input description (for example, byte
3 and 4 are engine RPM scaled as .25 *
×
RPM in Motorola representation), you can use
ndConvertFromPhys
to convert the physical value to the byte stream by filling an
appropriate
typeDescriptor
struct.
ndConvertFromPhys
converts only the portion specified by one type descriptor to a binary
representation. If your data input consists of several values, you can use
ndConvertFromPhys
multiple times on different parts of the byte array.