CANopen Node


This area describes the API functions of the CANopen core module. These functions are implemented within the source file: co_core.c/h

The class CO_NODE is defined within co_core.h and is responsible for the overall node management functions. The node is the central data point of an CANopen device. The following data members are in this class:

Data Member Type Description
Dict CO_DICT object dictionary object
If CO_IF CAN bus interface object
Emcy CO_EMCY node emergency object
Tmr CO_TMR timer manager object
Nmt CO_NMT node network management object
Sdo CO_SDO SDO server object array
SdoBuf uint8_t* pointer to SDO transfer buffer
RPdo[] CO_RPDO receive PDO object array
TPdo[] CO_TPDO transmit PDO object array
TMap[] CO_TPDO_LINK transmit PDO mapping link array
Sync CO_SYNC SYNC management object
Lss CO_LSS LSS management object
Error CO_ERR Internal error indentification code
Baudrate uint32_t default CAN communication baudrate
NodeId uint8_t default CANopen node ID

Note: The data within this structure must never be manipulated without the corresponding class member functions. This can lead to unpredictable behavior of the node.

During calling a member function of a class, the first parameter must be a reference to a corresponding object. This should be done as shown in the following examples:

      CO_NODE  AppNode;                  /* allocation of the application node    */
      :
      CONodeInit (&AppNode       ,...);  /* call member function of class CO_NODE */
      CODirFind  (&(AppNode.Dir) ,...);  /* call member function of class CO_DIR  */
      COIfSend   (&(AppNode.If)  ,...);  /* call member function of class CO_IF   */
      COEmcySet  (&(AppNode.Emcy),...);  /* call member function of class CO_EMCY */
      COTmrCreate(&(AppNode.Tmr) ,...);  /* call member function of class CO_TMR  */
      CONmtReset (&(AppNode.Nmt) ,...);  /* call member function of class CO_NMT  */
      :

Note, that in all application source files, which needs to call one or more CANopen API functions, the header file co_core.h must be included.