Denso BHT-200QW Especificaciones descargar pdf (Pagina 546)

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Appendix I

Appendix IAppendix I

Appendix I

Program Samples

Program SamplesProgram Samples

Program Samples

Writing the function for receiving both bar code entry and key entry

Feature: This function receives earlier one of either bar code entry or key entry. If bar

code reading is completed, the function returns the scanned bar code data;

if key entry comes first, the function inhibits bar code reading and echoes

back the key entry data, then returns the key entry data when the ENT key

is pressed.

If pressing the BS key or C key makes the input string empty, then the

function becomes ready to receive the subsequent bar code entry or key

entry.

Returned value: The function returns bar code data or key entry data which has come in

until

the ENT key is pressed, as a string.

Arguments: f.no%Specifies the file number which opens the bar code device file.

(Invariant allowed)

bar$ Specifies bar code reading. (Invariant allowed)

Ex. "M:10-20"

max%Specifies the maximum length of a returned string

esc$ If a key(s) contained in this string is entered, the function

returns

the key entry only.

Work: .kb$ and .rt$

If you use an invariant for f.no% or bar$, it is not necessary to pass the value as an

argument.

The bar$ can pass a single type of bar code. If two or more types are required, directly

describe necessary invariants.

def fnbarkey$(f.no%, bar$, max%, esc$)

while 1

open "BAR:" as #f.no% code bar$

wait 0, 3 'Wait for completion of bar code reading or key entry.

if loc(#f.no%) then

beep 'Beep when bar code reading is completed.

fnbarkey$ = input$(max%, #f.no%)

'For displaying:

'rt$ = input$(max%, #f. no%) : print .rt$;

'fnbarkey$ = .rt$

close #f.no%

exit def

else

close #f.no% 'Receive only key entry.

.rt$ = ""

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