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Serial Port Library Functions MVI-ADM ♦ 'C' Programmable
Developer's Guide 'C' Programmable Application Development Module
Page 264 of 342 ProSoft Technology, Inc.
February 20, 2013
MVIsp_PurgeDataUnread
Syntax
int MVIsp_PurgeDataUnread(int comport)
Parameters
comport
port whose receive data is to be purged
Description
MVIsp_PurgeDataUnread deletes all data waiting in the receive queue. The data
is discarded and is no longer available for reading.
Note: If handshaking is enabled and the transmitting serial device has been paused, this function
will release the transmitting serial device to resume transmission.
MVI46 and MVI56 only.
Return Value
MVI_SUCCESS
the data was purged successfully
MVI_ERR_BADPARAM
invalid comport
MVI_ERR_NOACCESS
the comport has not been opened
Example
if (MVIsp_PurgeDataUnread(COM1) == MVI_SUCCESS)
printf("Transmit Data purged.\n");
See Also
MVIsp_PurgeDataUnsent (page 263)
- MVI-ADM 1
- Your Feedback Please 2
- Content Disclaimer 2
- Warnings 3
- Battery Life Advisory 4
- Contents 5
- 1 Introduction 13
- In This Chapter 15
- 2.1 Package Contents 16
- 2.3.1 Setup Jumper 18
- 2.4 Cable Connections 19
- 2.4.3 RS-422 22
- 3.1 API Libraries 26
- 3.1.1 Calling Convention 26
- 3.1.2 Header File 26
- 3.1.3 Sample Code 26
- 3.2 Development Tools 28
- 3.3 Theory of Operation 29
- 3.3.1 ADM API 29
- 3.4 ADM Functional Blocks 30
- 3.4.1 Database 30
- 3.4.3 Serial Communications 53
- 3.4.4 Main_app.c 53
- 3.4.5 Debugprt.c 54
- 3.4.6 MVIcfg.c 54
- 3.4.7 Commdrv.c 56
- 3.5 ADM API Architecture 59
- 3.6 ADM API Files 60
- 3.7 Backplane API Files 64
- 3.8 Serial API Files 66
- 3.9 Side-Connect API Files 67
- 3.9.2 Data Transfer 67
- 4.2 Setting Up WINIMAGE 87
- SETDNPSC 10 88
- 5 Programming the Module 91
- 5.1 ROM Disk Configuration 92
- 5.1.1 CONFIG.SYS File 92
- 5.1.2 Command Interpreter 94
- 5.1.3 Sample ROM Disk Image 95
- 5.3 MVIUPDAT 99
- CONNECT 100
- 5.4 MVI System BIOS Setup 101
- 5.5 Debugging Strategies 102
- 6 Creating Ladder Logic 103
- 6.1 MVI46 Ladder Logic 104
- 6.1.1 Main Routine 104
- 6.2.2 Read Routine 105
- 6.2 MVI56 Ladder Logic 105
- 6.2.1 Main Routine 105
- 6.3 MVI69 Ladder Logic 106
- 6.3.1 Main Routine 106
- 6.3.2 Read Routine 107
- 6.3.3 Write Routine 108
- 6.4 MVI71 Ladder Logic 109
- 6.4.1 Sample Ladder Logic 109
- 6.5 MVI94 Ladder Logic 115
- 6.5.1 Main Routine 115
- 6.5.2 ADM 116
- ADM API 119
- 7.1 ADM API Functions 120
- ADM_Open 123
- ADM_Close 124
- ADM_ProcessDebug 125
- ADM_DAWriteSendCtl 126
- ADM_DAWriteRecvCtl 127
- ADM_DAWriteSendData 128
- ADM_DAWriteRecvData 129
- ADM_ConPrint 130
- ADM_CheckDBPort 131
- ADM_DBOpen 132
- ADM_DBClose 133
- ADM_DBZero 134
- ADM_DBGetBit 135
- ADM_DBSetBit 136
- ADM_DBClearBit 137
- ADM_DBGetByte 138
- ADM_DBSetByte 139
- ADM_DBGetWord 140
- ADM_DBSetWord 141
- ADM_DBGetLong 142
- ADM_DBSetLong 143
- ADM_DBGetFloat 144
- ADM_DBSetFloat 145
- ADM_DBGetDFloat 146
- ADM_DBSetDFloat 147
- ADM_DBGetBuff 148
- ADM_DBSetBuff 149
- ADM_DBGetRegs 150
- ADM_DBSetRegs 151
- ADM_DBGetString 152
- ADM_DBSetString 153
- ADM_DBSwapWord 154
- ADM_DBSwapDWord 155
- ADM_GetDBCptr 156
- ADM_GetDBIptr 157
- ADM_GetDBInt 158
- ADM_DBChanged 159
- ADM_DBBitChanged 160
- ADM_DBOR_Byte 161
- ADM_DBNOR_Byte 162
- ADM_DBAND_Byte 163
- ADM_DBNAND_Byte 164
- ADM_DBXOR_Byte 165
- ADM_DBXNOR_Byte 166
- 7.5 ADM API Clock Functions 167
- ADM_StartTimer 167
- ADM_CheckTimer 168
- ADM_BtOpen 169
- ADM_BtClose 170
- ADM_BtNext 171
- ADM_ReadBtCfg 172
- ADM_BtFunc 173
- ADM_SetStatus 174
- ADM_SetBtStatus 175
- 7.7 ADM LED Functions 176
- ADM_SetLed 176
- 7.8 ADM API Flash Functions 177
- ADM_FileGetString 177
- ADM_FileGetInt 178
- ADM_FileGetChar 179
- ADM_GetVal 180
- ADM_GetChar 181
- ADM_GetStr 182
- ADM_SkipToNext 183
- ADM_Getc 184
- ADM_GetVersionInfo 185
- ADM_SetConsolePort 186
- ADM_SetConsoleSpeed 187
- ADM_ScOpen 188
- ADM_ScClose 189
- ADM_ReadScFile 190
- ADM_ReadScCfg 191
- ADM_ScScan 192
- 7.11 ADM API RAM Functions 193
- ADM_EEPROM_ReadConfiguration 193
- ADM_RAM_Find_Section 194
- ADM_RAM_GetString 195
- ADM_RAM_GetInt 196
- ADM_RAM_GetLong 197
- ADM_RAM_GetFloat 198
- ADM_RAM_GetDouble 199
- ADM_RAM_GetChar 200
- 8 Backplane API Functions 201
- MVIbp_Open 203
- MVIbp_Close 204
- MVIbp_GetIOConfig 206
- MVIbp_SetIOConfig 208
- MVIbp_WaitForInputScan 210
- MVIbp_WaitForOutputScan 212
- MVIbp_ReadOutputImage 214
- MVIbp_WriteInputImage 215
- MVIbp_ReceiveMessage 216
- MVIbp_SendMessage 218
- MVIbp_GetVersionInfo 220
- MVIbp_GetModuleInfo 221
- MVIbp_ErrorString 222
- MVIbp_SetUserLED 223
- MVIbp_SetModuleStatus 224
- MVIbp_GetConsoleMode 225
- MVIbp_GetSetupMode 226
- MVIbp_GetProcessorStatus 227
- MVIbp_Sleep 228
- MVIbp_SetConsoleMode 229
- MVIbp_ReadModuleFile (MVI46) 230
- MVIsp_Open 235
- MVIsp_OpenAlt 237
- MVIsp_Close 239
- MVIsp_Config 240
- MVIsp_SetHandshaking 242
- MVIsp_SetRTS 243
- MVIsp_GetRTS 244
- MVIsp_SetDTR 245
- MVIsp_GetDTR 246
- MVIsp_GetCTS 247
- MVIsp_GetDSR 248
- MVIsp_GetDCD 249
- MVIsp_GetLineStatus 250
- MVIsp_Putch 251
- MVIsp_Getch 252
- MVIsp_Puts 253
- MVIsp_PutData 255
- MVIsp_Gets 257
- MVIsp_GetData 259
- MVIsp_GetCountUnsent 261
- MVIsp_GetCountUnread 262
- MVIsp_PurgeDataUnsent 263
- MVIsp_PurgeDataUnread 264
- MVIsp_GetVersionInfo 265
- 10.2 CIP API Architecture 269
- MVIcip_Open 270
- MVIcip_Close 271
- MVIcip_RegisterAssemblyObj 272
- MVIcip_UnregisterAssemblyObj 274
- 10.5 CIPConnect 275
- Data Transfer 275
- MVIcip_WriteConnected 275
- MVIcip_ReadConnected 276
- MVIHANDLE connHandle; 277
- BYTE buffer[128]; 277
- 10.6 CIP Callback Functions 278
- MVIcip_RegisterFatalFaultRtn 289
- MVIcip_RegisterResetReqRtn 290
- MVIcip_GetIdObject 292
- MVIcip_GetVersionInfo 293
- MVIcip_SetUserLED 294
- MVIcip_SetModuleStatus 295
- MVIcip_ErrorString 296
- MVIcip_GetSetupMode 297
- MVIcip_GetConsoleMode 298
- MVIcip_Sleep 299
- 11.1 Initialization 302
- 11.1.1 PLC Data Table Access 302
- 11.1.2 Synchronization 302
- 11.2 PLC Message Handling 303
- 11.2.1 Block Transfer 303
- 11.2.3 Miscellaneous 303
- MVIsc_Open 304
- MVIsc_Close 305
- MVIsc_GetPLCFileInfo 306
- MVIsc_WritePLC 308
- MVIsc_ReadPLC 310
- MVIsc_RMWPLC 312
- MVIsc_WaitForEos 314
- MVIsc_PLCMsgRead 315
- MVIsc_PLCMsgWrite 316
- MVIsc_PLCMsgWait 317
- MVIsc_PLCBTRead 318
- MVIsc_PLCBTWrite 319
- MVIsc_GetPLCStatus 320
- MVIsc_GetPLCClock 322
- MVIsc_SyncPLCClock 323
- MVIsc_ClearFault 324
- MVIsc_SetPLCMode 325
- MVIsc_GetVersionInfo 326
- MVIsc_ErrorStr 327
- MVIsc_GetLastPcccError 328
- MVIsc_BCD2BIN 329
- MVIsc_BIN2BCD 330
- 13.2 Warranty Information 334
- Glossary of Terms 335
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