Remote-processing BASIC for the CX-10 Modbus Manuale Utente Scaricare il pdf (Pagina 22)

BASIC PROGRAMMING GUIDE

2-13

DBY

Syntax: A=DBY(

expr

)

DBY(

expr

variable

Where:

expr

= 0 to 255

variable

= 0 to 255

Function: Read/write internal data memory.

Mode: Command, run

Use: DBY(0F0H) = 45H

A=DBY(100)

DESCRIPTION

The DBY instruction retrieves or assigns a value to the 8052 internal data memory.

expr

and

variable

must

both must be between 0 and 255 since there are only 256 internal memory locations and one byte can only be

between 0 and 255.

BASIC-52 uses many internal memory locations for its own use. Change internal memory with caution or

Basic may malfunction. Locations 1BH through 21H may be used in any way you wish.

CBY, XBY

ERROR

BAD ARGUMENT Invalid

expr

value, such as DBY(256) or attempt to assign an invalid value to a

DBY(

expr

), such as DBY(18H)=1000.

EXAMPLE

100 DBY(1EH) = 234

110 PRINT DBY(1EH)

>run

234

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 83 84

Nessun commento

Remote-processing BASIC for the CX-10 Modbus Manuale Utente Pagina 22