CANopen Manager / Slave Manual - esd electronics, Inc.

CANopen-Slave
Page 32 of 65
these values is managed by the CANopen slave library.
For multibyte data types the structure has to be initialized with a pointer to an
application defined memory region, the length of this memory range and the
length of the current string.
Handler is the object event handler of this entry which is called by the CANopen
slave library to indicate data changes to the application. In comparison to
canOpenInitDictionary() this handler indicates a timestamp in addition to the
values which are indicated with the standard handler. Refer to chapter 4.6 for a
detailed description of the data event handler.
Return: 0 or an error code described in the appendix.
canOpenReadDictionary()
Name: canOpenReadDictionary() - reading a local directory entry
Synopsis: int canOpenReadDictionary
(
HNODE HNode, /* handle of the CANopen node */
unsigned short Index, /* index in the object directory */
unsigned short Subindex, /* subindex of entry */
void * Data /* pointer to data sink */
)
Description: This function reads an entry in the local object directory. It can be called in
every node state.
Index is the index in the object directory and subindex is the subindex.
Data is a pointer to an application-memory area in which the data is stored. This
memory range must have a size of at least 4 bytes. In numerical data data is a
pointer to the data, in other data types it is a pointer to a pointer to the data.
Return: 0 or an error code described in the appendix.
Software Manual • Doc. No.: C.2002.21 / Rev. 2.2 CANopen Slave