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UngetCommChar
int UngetCommChar(idComDev, chUnget)
int idComDev;
/* Communication device */
char chUnget;
/* Character to be placed in the queue */
The UngetCommChar function replaces the specified character in the reception queue. At the next
read operation, this character will be read first.
< Parameter >
idComDev
: Specifies the communication device which receives the characters. The OpenComm
function returns this value.
chUnget
: Specifies the characters to be placed in the reception queue.
< Return value >
Returns zero if the function is terminated normally. Otherwise it returns a value less than zero.
Note:
The UngetCommChar function cannot be called repeatedly. To make it possible to call this function
again, it is necessary to read out characters in the queue.
Note on IrDA:
There are no particular use restrictions.
- IT-2000W 1
- Technical Reference 1
- Table of Contents 2
- Important notices to user 5
- Copyright notice 5
- About MS-DOS 6.22 5
- About MS-Windows 5
- About trademarks 5
- 1. Overview 6
- 1.1 Features of System 6
- 1.1.1 Development Concept 6
- 1.1.2 Hardware 6
- 1.1.3 Software 6
- 1.1.4 Basic Specifications 7
- 1.1.5 Model Name 8
- 1.2 System Configuration 9
- 1.2.1 Hardware Block Diagram 9
- 1.2.2 Supported Software 10
- Windows Driver 11
- Utilities 11
- Development Tool Libraries 12
- 1.3 Precautions 13
- 2. Basic Software 16
- 2.1 Overview 16
- 2.1.1 Software Configuration 16
- 2.1.2 Memory Map 17
- 2.1.3 Drive Configuration 18
- 2.2 Basic System Operation 19
- 2.2.1 Overview 19
- 2.2.2 Power ON Process 21
- Application Boot Process 22
- System Menu Boot Process 22
- Resume Process 23
- ON Factors 23
- 2.2.3 Power OFF Process 25
- OFF Factors 26
- Battery Operation Scheme 27
- Low Voltage Level 28
- Auto Power OFF Function (APO) 32
- DOZE/RUN Transit Function 33
- Replacement of Batteries 34
- Main Battery Recharge 35
- 2.3 Supported Devices 36
- 2.3.1 Display Unit 36
- Software Functions 37
- Hardware Window 37
- Contrast Adjustment 37
- 2.3.2 EL Backlight 38
- 2.3.3 Touch Panel 39
- 2.3.4 Disk 40
- F-ROM Drive 41
- PC Card Drive 41
- 2.3.5 Serial Communication 42
- 2.3.6 PC Card 44
- Card Lock Switch 45
- 2.3.7 Clock Timer 46
- 2.3.8 Buzzer 47
- 2.3.9 Barcode Reader 48
- IrDA 1.0 49
- IrDA 1.1 49
- 2.3.11 Keys 50
- 2.3.12 Sensors 51
- 3. System Menu 52
- 3.2 Basic Operation 53
- 3.3 List of Functions 53
- 3.4 Key Click Sound Setup 54
- 3.5 Buzzer Volume Setup 55
- 3.6 Contrast Adjustment 56
- 3.7 Auto Backlight Setup 57
- 3.8 Auto Power OFF Setup 58
- 3.9 Touch Panel Calibration 59
- 3.10 YMODEM Utility 61
- Operations 63
- 3.11 FLINK Command 65
- Operation 66
- 3.12 System Date/Time Setup 68
- 3.13 Command Prompt 69
- 3.14 RAM Disk Size Change 70
- 3.15 Disk Format 72
- 3.16 System Initialization 74
- 3.17 Password Entry 75
- 4. MS-DOS 76
- 4.1 Overview 76
- Basic Drive 77
- Example of CONFIG.SYS 78
- Example of AUTOEXEC.BAT 80
- 4.3 Card Boot 81
- 5. MS-Windows 84
- 5.1 Overview 84
- 6. Keyboard Controller 87
- 6.1 Overview 87
- 6.2 Keyboard Control 88
- 6.4 Sensor Control 91
- 6.5 Backlight Control 92
- 7. Drivers 95
- 7.1 Overview 95
- 7.2 System Driver 96
- 7.2.1 Function 96
- 7.2.2 Startup Method 96
- 7.3 Clock Control Driver 97
- 7.3.1 Function 97
- 7.3.2 Startup Method 98
- 7.4.1 Function 99
- 7.5 PenMouse Driver 100
- 7.5.1 Overview 100
- 7.5.2 Startup Method 101
- 7.6 Virtual Keyboard Driver 102
- 7.6.1 Function 102
- 7.6.2 Startup Method 103
- 7.7.1 Function 104
- 7.7.2 Operation Method 104
- 7.8 Display Driver 105
- 7.8.1 Function 105
- 7.8.2 Startup Method 105
- 7.9 COM Driver for IrDA 107
- 7.9.1 Overview 107
- BuildCommDCB 110
- ClearCommBreak 111
- CloseComm 112
- EnableCommNotification 113
- EscapeCommFunction 115
- FlushComm 116
- GetCommError 117
- CE_TXFULL 118
- COMSTAT structure 119
- GetCommEventMask 120
- OpenComm 121
- GetCommState 123
- ReadComm 124
- SetCommBreak 125
- SetCommEventMask 126
- SetCommState 128
- DCB structure 129
- TransmitCommChar 132
- UngetCommChar 133
- WriteComm 134
- MaxBaudRate 136
- SizeWindow 136
- SizeData 136
- DisconnectThresholdTime 136
- MaxTurnAroundTime 137
- MinTurnAroundTime 137
- DeviceNickName 137
- DeviceName 138
- DiscoverCount 138
- ServiceType 138
- 7.9.4 Installation Method 139
- 8. Application Development 141
- 8.1 Overview 141
- 8.3 Development Environment 143
- 8.3.3 Simulation Driver 144
- D:>cd windows 149
- D: WINDOWS>WIN aplic 149
- 8.5 Simulation Driver 152
- Overview 153
- Function 153
- Installation method 154
- Monitor window 154
- Note on the simulation: 156
- 8.6 Library 157
- 8.6.2 System Library 158
- List of Libraries 159
- Acquisition of BIOS Version 160
- Switching Over COM2 Channel 164
- Reboot Request 166
- Setting ABO Time 167
- Acquisition of ABO Time 168
- Backlight ON/OFF 172
- Setting Buzzer Volume 174
- Acquisition of Buzzer Volume 175
- Device Power ON/OFF 177
- Software Card Lock 178
- Key Click Sound ON/OFF 180
- Acquisition of Reboot Reason 182
- Acquisition of OFF Reason 183
- Setting APO Time 188
- Acquisition of APO Time 189
- Setting Status of Alarm 190
- Acquisition of Alarm Setting 191
- Resetting Alarm 192
- Setting Key Click Sound ON 195
- Keypad Library 196
- Input acceptance mode 197
- Toggle function 197
- Repeat function 197
- Key click sound 197
- Fig. 8.22 203
- Fig. 8.21 203
- Explanation 208
- Key acceptance property 208
- Expansion key number property 209
- Expansion keycode property 210
- Expansion key image property 210
- <In case of VC> 211
- <In case of VB> 211
- 8.6.4 OBR Library 213
- Reception Buffer 214
- Data Format 215
- List of Available Functions 216
- Initialization of OBR 216
- Release of COM Port 217
- Transmission of Command 218
- Readout of Received Data 220
- Invalidating Code in Buffer 221
- #include “obrlib.h” 222
- Writing Set Values to EEPROM 224
- Command List 229
- 8.6.5 YMODEM Library 233
- Error codes 234
- OpenYMODEM 234
- SendByYMODEM 235
- RecieveByYMODEM 236
- SetCommForYMODEM 237
- CloseYMODEM 238
- 8.6.6 FLINK Library 239
- Interface to DLL 240
- /* Code in C++ */ 241
- File deletion 243
- File move 243
- Communication Commands 244
- File Transmission (/S) 244
- File Reception (/R) 246
- File Append (/A) 248
- File Deletion (/D) 249
- File Move/File Rename (/N) 250
- Idle Start 251
- Wait Time Setup (/L) 252
- COM Environment Setup (/Y) 253
- List of termination codes 255
- 9. Utility 257
- 9.1 Overview 257
- 9.2 Calculator Utility 258
- Startup Method 259
- Basic Function 259
- .3 Clock Utility 260
- Setup File 261
- 9.4 Calendar Utility 262
- 9.6 FLINK Utility 264
- Command Specification Method 265
- IrDA communication speed 265
- Example of specification 266
- 9.6.2 File Transmission (/S) 267
- Example of specifications 268
- 9.6.3 File Reception (/R) 269
- 9.6.4 File Append (/A) 271
- 9.6.5 File Deletion (/D) 272
- 9.6.6 File Move/Rename (/N) 273
- 9.6.7 Idle Start 274
- Category 275
- BREAK KEY INTERRUPT ENDING 275
- 9.7 XY Utility 277
- Function and operation method 278
- Other parameters 280
- File name 280
- 9.8 Reverse Video Utility 282
- 9.9 COM2KEY Utility 283
- Start Option 284
- Operation at Menu Startup 285
- WINST.INF 286
- Keyboard=Setting 287
- Example of Using WINST.EXE 288
- APPENDIX A: TFORMAT.EXE 291
- APPENDIX B: PC Card Driver 292
- SRAM Card Driver (MTSRAM.EXE) 293
- IDE/ATA Support (ATADRV.EXE) 293
- APPENDIX C: 295
- Acquisition of Power Status 296
- End of the Manual 297
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