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Using the function WWORD when simulating with keil uvision 4

Hi , im trying to simulate some peripherals for mi c51 application , but i have the following problem :

One of these peripherals needs to write several positions of the external memory of the C51 , im using the function WWORD ( but the same applies to RWORD when i want to read external memory)

if i use :

WWORD ( X: 0003 , WordToCopy) ; the vlaue of WordToCopy its written on the direccion 0x0003 from the external memory

now if i do :

buffer = 0x0003;
WWORD (X:buffer , WordToCopy);

or

buffer = X:0x0003:
WWORD(buffer , WordToCopy);

in bot cases WordToCopy its written in the address 0x0003 of the internal ram in this case its the register r3 , and r4

My question is , how can i write external memory without having to write address by addres ( i wanted to use this variable buffer inside a for , changing its value , since i have to write lots of bytes)

Thanks for the help !

Parents
  • i've copy&paste those functions on my script and defined the buttons , but both of them keep writting the data on R3 and R4 , are there any special configuration for this functions that i can modify ?

    Im not sure if this will help , but im using the following version of Uvision

    IDE-Version:
    µVision V4.14.16.0
    Copyright (C) 2011 ARM Ltd and ARM Germany GmbH. All rights reserved.

    Tool Version Numbers:
    Toolchain: PK51 Prof. Developers Kit Version: 9.03
    Toolchain Path: C:\Keil\C51\BIN\
    C Compiler: C51.Exe V9.03
    Assembler: A51.Exe V8.02
    Linker/Locator: LX51.Exe V4.55a
    Librarian: LIBX51.Exe V4.24
    Hex Converter: OHX51.Exe V1.38
    CPU DLL: S8051.DLL V3.75
    Dialog DLL: DCore51.DLL V2.74

Reply
  • i've copy&paste those functions on my script and defined the buttons , but both of them keep writting the data on R3 and R4 , are there any special configuration for this functions that i can modify ?

    Im not sure if this will help , but im using the following version of Uvision

    IDE-Version:
    µVision V4.14.16.0
    Copyright (C) 2011 ARM Ltd and ARM Germany GmbH. All rights reserved.

    Tool Version Numbers:
    Toolchain: PK51 Prof. Developers Kit Version: 9.03
    Toolchain Path: C:\Keil\C51\BIN\
    C Compiler: C51.Exe V9.03
    Assembler: A51.Exe V8.02
    Linker/Locator: LX51.Exe V4.55a
    Librarian: LIBX51.Exe V4.24
    Hex Converter: OHX51.Exe V1.38
    CPU DLL: S8051.DLL V3.75
    Dialog DLL: DCore51.DLL V2.74

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