Measurement-computing TempBook rev.3.0 Manual do Utilizador Página 83
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TempBook User’s Manual tbkCommand Reference (
Standard
API) 9-23
tbkSetProtocol
DLL Function
int tbkSetProtocol( int protocol)
C
tbkSetProtocol(int protocol);
QuickBASIC
BtbkSetProtocol% (ByVal protocol%)
Visual Basic
VBtbkSetProtocol% (protocol%)
Turbo Pascal
tbkSetProtocol( protocol:integer ):integer;
Parameters
protocol
One of the predefined protocol codes listed below (additional protocol codes may be described in the
README file).
Name Description Value
TbkProtocol8
8-bit I/O 1
TbkProtocol4
4-bit I/O 2
TbkProtocolFPort
Far Point F/Port EPP Interface 10
TbkProtocolSL
82360 SL EPP Interface 20
TbkProtocolSMC666
SMC 37C666 EPP mode 30
TbkProtocolEPPBIOS
EPP bios mode 40
TbkProtocolPastEPP
WBK20/21 Fast EPP mode 50
Returns
An error number, or 0 if no error.
See Also
tbkInit, tbkGetProtocol
Program References
tbkSetProtocol
specifies to the TempBook/66 driver the type of parallel-port implementation
and protocol that is available on the computer. The driver then attempts to configure the computer
and the TempBook/66 to communicate using the specified protocol. Since establishing the protocol
may affect the settings of the TempBook,
tbkSetProtocol
should only be invoked immediately
after
tbkInit
has established communications with and reset the TempBook. Switching protocols
during normal TempBook/66 operation is not recommended.
Two types of parallel port implementations are supported by the TempBook: standard and enhanced.
Standard parallel ports, using the TempBook/66 manufacturer’s proprietary protocols, are capable of
receiving data either 4 or 8 bits at a time. When possible, 8-bit operation is preferred (it is much
faster), but not all standard parallel ports support 8-bit data reception.
Enhanced parallel ports (EPP) include extra hardware that increases the rate of data transfer to 3 to
10 times the rate of a standard parallel port. Unfortunately, not every computer includes EPP
capability and attempting to use EPP on an incompatible computer may cause the TempBook/66
driver to access I/O locations which are not part of the printer port interface. Such accesses may
interfere with other operations and cause the computer to operate incorrectly. For this reason, EPP
operation must be explicitly requested by the program.
When the TempBook/66 is initialized by
tbkInit
, it is initially configured for a standard parallel
port protocol: either 8-bit, if possible, or the slower 4-bit protocol. After
tbkInit
has completed,
tbkSetProtocol
may be used to switch to another supported protocol.
If
tbkSetProtocol
is unable to establish communications using the specified protocol, then it
will try to establish communications using the standard port protocols, first 8-bit, then the slower 4-
bit. In such an event,
tbkSetProtocol
will not return an error indication unless it is unable to
establish any protocol.
In any case,
tbkGetProtocol
may be used to check the current operating protocol.
- User’s Manual 1
- TempBook/66-901 2
- How To Use This Manual 3
- Table of Contents 4
- 5 Programmer’s Guide 5
- 8 Thermocouple Measurement 5
- 6
- Introduction and Quick Start 7
- Available Accessories 8
- Specifications 8
- Quick Start 9
- Power Connection 10
- Software Installation 10
- Inspection 11
- TempBook Termination Card 12
- Analog Signal Connection 12
- Internal Configuration 13
- Hardware Installation 13
- Charging the Battery Modules 14
- Parallel Port Capabilities 15
- Resource Tests 17
- Performance Tests 17
- Connection Troubleshooting 18
- Calibration of TempBook 18
- Using TempView 19
- TempView Components 20
- Acquisition Configuration 21
- Counter/Timer Window 22
- Digital I/O Window 22
- TempView Menu Items 23
- Select Device 24
- Acquisition 24
- Using PostView 25
- PostView Toolbar Items 26
- 11-16-00 27
- The PostView Timebase 28
- Data File Accessibility 28
- Programmer's Guide 29
- Data Acquisition 30
- Program Flowchart 30
- Driver Options 31
- High-Level Analog Input 33
- Low-Level Analog Input 34
- High-Speed Digital Input 36
- Counter/Timer Functions 37
- Thermocouple Linearization 39
- Sample Programs 40
- General Purpose Digital I/O 43
- Counter Timer Functions 45
- Software Calibration 51
- Calibration Example 52
- Zero Compensation 53
- Zero Compensation Example 54
- Automatic Zero Compensation 55
- Thermocouple Measurement 57
- Single-Channel Measurement ( 59
- General Functions 62
- Thermocouple 93
- API Error Codes - C Languages 93
- API Error Codes - QuickBASIC 94
- Data Acquisition Environment 97
- Basic Models 98
- Enhanced 100
- TempBook User’s Manual 101
- 10-10 106
- 10-12 108
- 10-14 110
- Background Acquisition 112
- Finally, close the device: 113
- 10-18 114
- 10-20 116
- Double Buffering 117
- 10-22 118
- Direct-to-Disk Transfers 119
- 10-24 120
- 10-26 122
- Overview 125
- API Reference Tables 159
- Event-Handling Definitions 160
- ADC Miscellaneous Definitions 161
- TempBook Definitions 162
- General I/O Definitions 162
- Command Definitions 162
- API Error Codes 163
- Appendix 165
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