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OpenLDV Programmer’s Guide 33
Table 18. ldv_write() Parameters
Parameter Direction Description
handle
Input The LONWORKS interface device to be written. This value
was returned as the handle parameter when you opened the
network interface with one of the open functions
(ldv_open(), ldv_open_cap(), or ldvx_open()).
msg_p Input A pointer to a buffer that contains the message to be written
to the network interface.
For information about the different message commands that
you can send with this function, and descriptions of the
application buffer structure that each one requires, see
Chapter 3, Sending and Receiving Messages with the
OpenLDV API, on page 57.
len Input The length of the message to be written. This length might
not match the length of buffer referenced by the msg_p
parameter. The len parameter should reflect how many
bytes will be written to the network interface, and should
therefore be less than or equal to the length of the buffer
referenced by the msg_p parameter.
Remarks
This function returns LDV_OK if the message is successfully written to the
network interface.
If the handle parameter is not valid, the LDV_INVALID_DEVICE_ID code is
returned. If the network interface referenced by the handle parameter is not
open, then the LDV_NOT_OPEN code is returned if it is a local network
interface. If it is a remote network interface, the LDVX_WRITE_FAILED code
is returned.
Be sure to use the message format (SICB or LdvEx) that corresponds to the
format specified when the network interface was opened.
ldv_xlate_device_name()
Call this function to retrieves the physical name of the Windows device that is
associated with a (logical) network interface name.
Legacy device drivers (for example, for PCC-10 or PCLTA-21 network interfaces)
can use the translated name to access the driver directly. In general, however,
using the translated name is not recommended.
- OpenLDV 1
- Programmer’s Guide 1
- Welcome 3
- Audience 3
- Examples 4
- Related Documentation 4
- Table of Contents 5
- Introduction 9
- ONWORKS network: 10
- OpenLDV Driver 11
- Client Applications 11
- Network Interfaces 12
- Installing the OpenLDV SDK 14
- Using the OpenLDV API 17
- ONWORKS network 18
- Application Layer 20
- Presentation Layer 21
- Overview of the OpenLDV API 21
- The OpenLDV API 23
- ONWORKS interface device 24
- ONWORKS name (such as 24
- LDVDevices Structure 46
- LdvCombineFlags Enumeration 47
- LdvDeviceCaps Enumeration 48
- LDVDriverInfo Structure 50
- LdvDriverID Enumeration 51
- LdvDriverType Enumeration 52
- OpenLDV API Return Codes 53
- ONWORKS Interfaces 57
- msgSize); 62
- Constructing Messages 66
- Application Buffer Structure 66
- Layer 2 Buffer Structure 69
- Application Layer Header 69
- Layer 2 Header 69
- Layer 5 Buffer Structure 70
- Message Header 70
- ExpMsgHdr 71
- NetVarHdr 73
- ONWORKS transceivers 74
- Network Address 75
- RcvAddrDtl 78
- RespAddrDtl 80
- Message Data 81
- UnprocessedNV 82
- ExplicitMsg 82
- Downlink Commands 84
- Uplink Commands 85
- Immediate Commands 85
- Network Interface Commands 85
- Common Definitions 98
- Dispatchers 98
- Toolkits and User Interface 99
- Developer Example Diagram 100
- ONWORKS 101
- LNS Applications for xDriver 106
- Extending xDriver 107
- Downlink Sessions 108
- 102 Extending xDriver 110
- Typical Downlink Scenario 111
- Uplink Sessions 112
- ONWORKS network, in a 114
- Typical Uplink Scenario 115
- Session Control Object 116
- Authentication Key Handling 119
- ONWORKS \xDriver\Components 123
- Add a COM Object 124
- Test the Lookup Extension 132
- Optional Steps 132
- Add a COM Class 135
- LNS Programming with xDriver 145
- ONWORKS networks 147
- ONWORKS networks by 148
- Uplink Sample Application 150
- Custom Network Interfaces 155
- Overview 156
- Windows Registry Entries 158
- LNS Methods and Events for 161
- AcceptIncomingSession 162
- Remarks 162
- BeginIncomingSessionEvents 163
- EndIncomingSessionEvents 163
- NetworkInterfaces.Item( ) 164
- Syntax 164
- OnIncomingSessionEvent 165
- ReleasePendingUpdates 166
- Custom Lookup Extension 169
- Component Programming 169
- ILdvxConfigure Interface 170
- SetInstance Method 170
- Returns 171
- SetOptions Method 171
- ILdvxLookup Interface 172
- DownlinkLookup Method 172
- UpdateLookup Method 173
- UplinkLookup Method 173
- ILdvxSCO Interface 174
- GetDownlinkKey Method 177
- GetUplinkKey Method 180
- SetAuthenticationFlag Method 181
- SetDownlinkKey Method 183
- SetEncryptionType Method 183
- SetLNSNetworkName Method 184
- SetUplinkKey Method 186
- ILdvxSCO_TCP Interface 186
- GetRemoteTCPAddress Method 187
- GetRemoteTCPPort Method 187
- SetRemoteTCPAddress Method 188
- SetRemoteTCPPort Method 188
- ILdvxSCO2 Interface 189
- GetNeuronID Method 189
- 184 Index 192
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