Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 77)

RPBASIC-52 PROGRAMMING GUIDE

2-58

LINEB (Statement)

Syntax: LINEB i/o bank,a ddress,da ta

Where: i/o bank = 0 to 7. Specific functions are card de pendent. Refer to your hardware manual.

address = device dependent. Usually it is 0 to 3.

data = 0 to 255, data to output.

Function: Writes a byte to an I/O device.

Mode: Command, Run

Use: LINEB3 ,0,A Writes valu e in A to port A of 8255 at digital port.

Card: Basic command available for all cards. Device/Function changes slightly for each card. Refer to the

hardware m anual.

DESCRIPTION

This statement is equivalent to OUT in other BASICs. Data is written 8 bits at a time. LINE and LINE #

write 1 bit at a time. The i/o bank selects a particular I/O device listed in your hardware m anual.

Use this command to access or program devices into modes not directly supported by RPBASIC-52.

LINE, LINE#, LINEB (function), LINE, LINE# (statement), CONFIG LINE

ERROR

BAD ARGUMENT i/o bank > 7, data > 255 or negative

EXAMPLE

The following example writes the value in variable 'C' to port B on the digital I/O connector.

100 LINE B3,1,C

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 162 163

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 77