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CIP API Functions ControlLogix Platform ♦ "C" Programmable
Developer's Manual Linux Application Development Module
Page 88 of 264 ProSoft Technology, Inc.
March 12, 2014
5.4 CIP Callback Functions
Note: The functions in this section are not part of the CIP API, but must be implemented by the
application. The CIP API calls the connect_proc or service_proc functions when connection or
service requests are received for the registered object. The optional fatalfault_proc function is
called when the backplane device driver detects a fatal fault condition.
Special care must be taken when coding the callback functions, because these
functions are called directly from the backplane device driver. Callback functions
may be called at any time. Therefore, they should never call any functions that
are non-reentrant. Many 'C'-runtime library functions may be non-reentrant.
In general, the callback routines should be as short as possible. Stack size is
limited, so keep stack variables to a minimum. Do as little work as possible in
the callback.
connect_proc
Syntax
OCXCALLBACK connect_proc( OCXHANDLE objHandle, OCXCIPCONNSTRUC *sConn );
Parameters
objHandle
handle of registered object instance
sConn
pointer to structure of type OCXCIPCONNSTRUCT
Description
connect_proc is a callback function which is passed to the CIP API in the
OCXcip_RegisterAssemblyObj call. The CIP API calls the connect_proc function
when a Class 1 scheduled connection request is made for the registered object
instance specified by objHandle.
sConn is a pointer to a structure of type OCXCIPCONNSTRUCT. this structure is shown
below:
typedef struct tagOCXCIPCONNSTRUC
{
OCXHANDLE connHandle; // unique value which identifies this connection
DWORD reg_param; // value passed via OCXcip_RegisterAssemblyObj
WORD reason; // specifies reason for callback
WORD instance; // instance specified in open
WORD producerCP; // producer connection point specified in open
WORD consumerCP; // consumer connection point specified in open
DWORD *lOTApi; // pointer to originator to target packet interval
DWORD *lTOApi; // pointer to target to originator packet interval
DWORD lODeviceSn; // Serial number of the originator
WORD iOVendorId; // Vendor Id of the originator
WORD rxDataSize; // size in bytes of receive data
WORD txDataSize; // size in bytes of transmit data
BYTE *configData; // pointer to configuration data sent in open
WORD configSize; // size of configuration data sent in open
WORD *extendederr; // an extended error code if an error occurs
} OCXCIPCONNSTRUC;
- MVI56E-LDM 1
- Your Feedback Please 2
- Warnings - MVI56E-LDM 2
- Contents 5
- 1 LDM Introduction 10
- In This Chapter 12
- 2.1 System Requirements 12
- 2.2 Package Contents - LDM 13
- 2.4.1 Setup Jumper - MVI56E 14
- telnetd file 20
- 2.8 Module Rescue 27
- 3 Development Environment 29
- 3.2 Using Eclipse 33
- 3.2.1 Building a Project 33
- python createimage.py 36
- 4.1 API Library - MVI56E 39
- 4.1.1 Header File 39
- 4.1.2 Sample Code 39
- 4.3 CIP API Functions 42
- 4.4 Backplane Device Driver 42
- 4.5 Sample Code 44
- 4.10 Sample Tutorials 51
- 4.11 Ethernet Sample 52
- 4.12 Serial Sample 55
- 4.13 Led_Sample 56
- 4.14 Backplane_Sample 57
- 4.15 Tag_Sample 59
- 4.16 Sample Applications 61
- 5 CIP API Functions 76
- OCXcip_Open 79
- OCXcip_OpenNB 80
- OCXcip_Close 83
- 5.2 Object Registration 85
- OCXcip_RegisterAssemblyObj 85
- OCXcip_UnregisterAssemblyObj 88
- OCXcip_RegisterFatalFaultRtn 90
- OCXcip_RegisterResetReqRtn 92
- 5.4 CIP Callback Functions 94
- 5.5 Connected Data Transfer 105
- OCXcip_WriteConnected 105
- OCXcip_ReadConnected 107
- OCXcip_ImmediateOutput 109
- OCXcip_WaitForRxData 111
- 5.6 Tag Access Functions 116
- OCXcip_AccessTagData 116
- OCXcip_CreateTagDbHandle 120
- OCXcip_DeleteTagDbHandle 121
- OCXcip_SetTagDbOptions 122
- OCXcip_BuildTagDb 125
- OCXcip_TestTagDbVer 127
- OCXcip_GetSymbolInfo 129
- OCXcip_GetStructInfo 132
- OCXcip_GetStructMbrInfo 135
- OCXcip_GetTagDbTagInfo 138
- OCXcip_AccessTagDataDb 141
- 5.7 Messaging 144
- OCXcip_GetDeviceIdObject 145
- OCXcip_GetDeviceICPObject 148
- OCXcip_GetDeviceIdStatus 151
- OCXcip_GetExDeviceObject 155
- OCXcip_GetWCTime 158
- OCXcip_SetWCTime 162
- OCXcip_GetWCTimeUTC 165
- OCXcip_SetWCTimeUTC 169
- 5.8 Miscellaneous Functions 172
- OCXcip_GetIdObject 173
- OCXcip_SetIdObject 175
- OCXcip_GetActiveNodeTable 177
- OCXcip_MsgResponse 179
- OCXcip_GetVersionInfo 182
- OCXcip_GetUserLED 184
- OCXcip_SetUserLED 186
- OCXcip_GetModuleStatus 188
- OCXcip_SetModuleStatus 190
- OCXcip_GetLED3 192
- OCXcip_SetLED3 194
- OCXcip_ErrorString 196
- OCXcip_SetDisplay 198
- OCXcip_GetDisplay 200
- OCXcip_GetSwitchPosition 202
- OCXcip_GetSerialConfig 204
- OCXcip_Sleep 207
- OCXcip_CalculateCRC 209
- OCXcip_SetModuleStatusWord 211
- OCXcip_GetModuleStatusWord 213
- 6 Cable Connections 215
- 6.3 RS-422 218
- 6.4.1 RS-485 and RS-422 Tip 219
- 7.2.1 Returning Any Product 221
- 7.3 LIMITED WARRANTY 223
- 7.3.8 No Other Warranties 229
- 7.3.9 Allocation of Risks 229
- 7.4 Open Source Licensing 230
- 7.5 GNU Public License 231
- 7.6 Eclipse Public License 245
- 7.7 Python Public License 251
- 7.8 GCC Public License 257
- 8 Glossary of Terms 260
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