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Chapter 6 Automotive Diagnostic Command Set API for C
© National Instruments Corporation 6-113 Automotive Diagnostic Command Set User Manual
ndUDSWriteMemoryByAddress
Purpose
Executes the UDS WriteMemoryByAddress service. Writes data to the ECU memory.
Format
long ndUDSWriteMemoryByAddress(
TD1 *diagRef,
unsigned long address,
unsigned char size,
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.
address
Defines the memory address to which data are written. Only three bytes are sent to the
ECU, so the address must be in the range 0–FFFFFF (hex).
size
Defines the length of the memory block to be written.
dataIn
Defines the memory block to be written to the ECU.
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