Measurement-computing ADLIB WIN Manuale Utente Pagina 120
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Chapter 39 Counter / Timer
26-2
26.4 AL_CounterOut
Prototype C\C++
ERRNUM AL_CounterOut(LHLD lhld, double dRate, long lUnits);
Visual Basic for Windows
Function AL_CounterOut(ByVal lhld As Long, ByVal dRate As Double,
ByVal lUnits As Long) As Long
LHLD lhld handle of the LDSD
double dRate specifies the rate of the Counter Output port
long lUnits specifies the rate units
After the Timer has been initialized, The AL_CounterOut function immedialetly sets the hardware
Counter Output port of the LDSD to the specified rate. Subsequent calls to AL_CounterOut will update
the output rate as specified.
Parameter Description
lhld Identifies the instance of the logical device subsystem.
dRate Specifies the rate at which a Counter Output will occur.
lUnits Sets the units in which the above rate parameter is specified. The available
settings are defined as AL_HERTZ or AL_TICS in the ADLIB include file.
Returns:
On success ERRNUM is set to 1, otherwise ERRNUM contains the last error code that occurred during the
call.
Related Functions:
AL_SetCtrMode
AL_GetCtrMode
Supported Logical Device Subsystems:
Pci55xx Series: CTR2, CTR3, Options: 7.7 to 500000
Note that Timers CTR2, CTR3 are referenced in the user manual as TMR0/1.
- ADLIB WIN 1
- Contents 9
- 1. INTRODUCTION 11
- • One CD drive 12
- • One fixed disk drive 12
- 2. INSTALLATION 13
- 4. APPLICATION DEVELOPMENT 17
- AL_CHECK_BUFFER 18
- AL_POSTMESSAGE 18
- AL_POSTMESSAGE_PARAMS 18
- AL_CALLBACK 18
- 5. PROGRAM DEVELOPMENT 21
- 6. MEMORY BUFFER ALLOCATION 25
- 8. ERROR HANDLING 33
- 10. BOARD FUNCTIONS 41
- 17. ANALOG OUTPUT 63
- 18. DIGITAL INPUT/OUTPUT 65
- 19. TRIGGERING MODES 69
- 20. CLOCKING MODES 77
- 21. GATING MODES 85
- 22. BURST MODES 91
- 23. CHANNEL SELECTIONS 95
- Pci55xx Series: ADC0 98
- 24. INPUT CONFIGURATIONS 105
- 25. DATA OFFSETS 111
- 26. COUNTER / TIMERS 117
- AL_GetBufferDoneHandler 129
- 30. ADLIB ERROR CODES 151
- BOARD STRUCTURE 152
- LOGICAL DEVICE HANDLES 152
- LDS STRUCTURE 153
- CAPS STRUCTURE 153
- ENVIRONMENT STRUCTURE 154
- OPTIONS STRUCTURE 154
- FILE I/O 154
- INI FILE 155
- INI FILE - continued 156
- CAPABILITIES FILE 157
- DRIVER 158
- COMMON DEVICE SETTINGS 159
- ADC - continued 161
- CONFIGURATION FILE 162
- DEVICE SUBSYSTEM CHANNELS 163
- TRIGGERS 167
- TRIGGER SOURCES 168
- TRIGGER SIGNALS 168
- TRIGGER OUTPUTS 168
- CLOCKING 168
- CLOCK SIGNALS 168
- CLOCK OUTPUTS 169
- DATA CODE 169
- DATA OFFSET 169
- INTERRUPTS 170
- SIGNAL PATHS 170
- DATA TRANSFER METHOD 170
- CYCLE MODE 170
- DATA SPAN 170
- DATA RANGE 171
- INPUT CONFIG 171
- OUTPUT CONFIG 171
- BUFFER NOTIFICATION METHOD 171
- START DEVICE 171
- DATA BUFFER CONTROL ERRORS 172
- BURST MODE CONTROL ERRORS 172
- GATE LEVELS 173
- DRIVERS 174
- DRIVERS - continued 175
- DEVICE DRIVER HANDLES 177
- RUNTIME ERRORS 177
- FILTERS 177
- HANDSHAKE 177
- PORT RESOLUTION 178
- CTR MODE 178
- CTR MODE (continued) 178
- ADLIB INTERNAL ERROR CODES 180
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