Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Manual de usuario descargar pdf (Pagina 339)

15B. Driver488/SUB, W31, W95, & WNT III. COMMAND REFERENCES - 15. Command References

III-324 Personal488 User’s Manual, Rev. 3.0

Driver488 provides additional

EnterI

routines that are short form versions of the

EnterXI

function.

The additional

EnterI

functions are:

EnterI

EnterNI

EnterMoreI

, and

EnterNMoreI

. These

functions are discussed in detail below:

EnterNI

SYNTAX

EnterNI(ByVal devHandle%,data%,By Val count& ) As Long

REMARKS

EnterNI

is equivalent to the following call to

EnterXI

EnterXI(devHandle%,data%,count&, 1, 0, 0, 0)

The

EnterNI

function passes the device handle, the pointer to the data buffer, and the size of the data

buffer to the

EnterXI

function. It specifies

forceAddr%

TRUE

, causing Driver488 to re-address the

device. The default terminators are chosen by specifying a

pointer as the

term

parameter.

Asynchronous transfer is turned off by sending

for the

async%

parameter, and the completion status

value is ignored by sending

for the

compStat%

parameter.

EnterNMoreI

SYNTAX

EnterNMoreI(ByVal devHandle%,data%,ByVal count&)As Long

REMARKS

EnterNMoreI

is equivalent to the following call to

EnterXI

EnterXI(devHandle%,data%,count&,0,0,0,0);

The

EnterNMoreI

function passes the device handle, the pointer to the data buffer, and the size of the

data buffer to the

EnterXI

function. It specifies

forceAddr%

FALSE

; therefore, Driver488 does not

address the device if it is the same device as previously used. The default terminators are chosen by

specifying a

as the

term

parameter. Asynchronous transfer is turned off by sending

for the

async%

parameter, and the completion status value is ignored by sending

for the

compStat%

parameter.

Note: All forms of the

EnterI

commands (except

EnterXI

) use

EOI

as the only terminator. Also,

EnterI

and

EnterMoreI

must be passed to the entire array (i.e.

intarray()

, not the

starting location:

intarray (0)

The following table describes the differences between the various forms of

EnterI

. It outlines the

variables passed to each function and how many bytes the functions read.

EnterI Function Reads Until Variable

EnterXI (ADC,IResp (0),1000,1,Term,1,1)

bytes or

terminators

Pass starting location

EnterI (ADC, IResp())

EnterMoreI (ADC, IResp ())

Array full or

EOI

Pass entire array

EnterNI (ADC< IResp (0), 1000)

EnterNMoreI (ADC, IResp (0), 1000)

bytes or

EOI

Pass starting location

where:

SResp

String * 1000

, and

IResp(1000)

integer

1 2 ... 334 335 336 337 338 339 340 341 342 343 344 ... 399 400

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