COObjGetSize
Description
This function returns the size of the given object directory entry.
Prototype
CPU_INT32U COObjGetSize(CO_OBJ *obj, CPU_INT32U width);
| Parameter | Description |
|---|---|
obj | pointer to the CANopen directory entry |
width | Expected object size in byte (or 0 if unknown) |
Returned Value
>0 object entry size in bytes
=0 an error is detected
Additional Information
The argument width is most likely given "0" (=unknown) when getting the size of an object entry. The intended use of this argument is for write access of dynamic sizes of user type objects (e.g. firmware loading with a maximum size).
Example
The following example gets the size of the hypothetical application specific object entry "[1234:56]" within the object directory of the CANopen node AppNode.