C51: Linking Programs for DS80C400 Using Start400.a51 Fails

Information in this article applies to:

• C51 All Versions

QUESTION

I used the Application Note 613 from Dallas Semiconductors to set up DS80C400 project in µVision. When I build the project I get messages like the following:

*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: INIT_ROMEXPORT
MODULE: startup400.obj (?C_STARTUP)
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: INIT_ROMEXPORT
MODULE: startup400.obj (?C_STARTUP)
ADDRESS: 1400048H
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: init_version
MODULE: main.obj (MAIN)

What is wrong?

ANSWER

You did not add two necessary files into your project that are needed to access the built-in ROM function of the DS80C400.

These files are provided by Dallas/Maxim together with the Application Note (AN613) and are called rom400_init.h and ROMINIT.LIB

MORE INFORMATION

• Dallas/Maxim AN613

Last Reviewed: Thursday, February 25, 2021