Keil Software — A51/AX51/A251 Macro Assembler and Utilities |
195 |
|
|
Chapter 7. Invocation and Controls
This chapter explains how to use Ax51 to assemble x51 assembly source files and discusses the assembler controls that may be specified on the command line and within the source file.
Using the controls described in this chapter, you can specify which operations are performed by Ax51. For example, you can direct Ax51 to generate a listing file, produce cross reference information, and control the amount of information included in the object file. You can also conditionally assemble sections of code using the conditional assembly controls.
Environment Settings
To run the Ax51 macro assembler and the utilities from a Windows command prompt, you must create new entries in the environment table. In addition, you must specify a PATH for the compiler folder. The following table lists the environment variables, their default paths, and a brief description.
Variable |
Path |
Description |
PATH |
KEIL\C51\BIN |
This environment variable specifies the path of the Ax51 |
|
or KEIL\C251\BIN |
executable programs. |
TMP |
|
This environment variable specifies which path to use for |
|
|
temporary files generated by the assembler. If the specified |
|
|
path does not exist, the assembler generates an error and |
|
|
aborts compilation. |
C51INC |
KEIL\C51\INC |
This environment variable specifies the location of the |
|
KEIL\C251\INC |
standard C51 or CX51 include files. |
C251INC |
This environment variable specifies the location of the |
|
|
|
standard C251 include files. |
Typically, these environment settings are automatically placed in your |
7 |
AUTOEXEC.BAT file. However, to put these settings in a separate batch file, use |
the following example as guideline:
PATH = C:\KEIL\C51\BIN
SET TMP = D:\
SET C51INC = C:\KEIL\C51\INC