The functionality of the CANopen Master protocol stack can by extended by add-on modules. The source files of these optional add-on modules are located within the source/stack-com/ directory as shown in the following figure.

Source code overview

Configuration of each individual add-on module is done via the cos_conf.h file.

Component	Directory	Description
Add-on Safety	stack-com/safety	Add-on Safety for CANopen Master protocol stack
Add-on Secure Configuration	stack-com/secure-config	Add-on Secure Configuration for CANopen Master protocol stack