| ||||
| Home Products Download Events Support | ||||
Technical Support
On-Line Manuals
C251 User's Guide
C251 Introduction 
Compiling Programs 
Environment Settings Command Prompt ERRORLEVEL Output Files Listing (LST) File Object (OBJ) File Preprocessor (I) File Source (SRC) File Directives Directive List Reference ASM ASMEXPAND BROWSE CODE COND DEBUG DEFINE DISABLE EJECT ENDASM FIXDRK FLOAT64 FLOATFUZZY FUNCTIONS HOLD HPTR INCDIR INTERVAL INTR2 INTVECTOR LARGE LISTINCLUDE MAXARGS MODBIN NAME NOALIAS NOAMAKE NOASMEXPAND NOCASE NOCOND NOEXTEND NOINTVECTOR NOOBJECT NOPRINT NOREGPARMS NVM_CONST OBJECT OBJECTADVANCED OPTIMIZE ORDER PACK PAGELENGTH PAGEWIDTH PARM251 PARM51 PREPRINT PREPRINTONLY PRINT REGFILE REGPARMS RENAMECODE RESTORE ROM SAVE SMALL SRC STRING SYMBOLS TABS TINY UNSIGNED_CHAR USERCLASS WARNING WARNINGLEVEL XSMALL XTINY Language Extensions Preprocessor Advanced Programming Error Messages Library Reference AppendixDirective List
The following table is an alphabetical list of the control directives available in the C251 Compiler.
| Directive | Group | Description |
|---|---|---|
| ASM | Source | Marks the beginning of an inline assembly block. |
| ASMEXPAND | Source | Marks the beginning of an inline assembly block. |
| BROWSE1 | Object | Enables source browser information. |
| CODE1 | Listing | Includes generated assembly in the listing file. |
| COND1 | Listing | Includes (in the listing file) conditional source lines skipped by the preprocessor. |
| DEBUG1 | Object | Includes debugging information in the object file. |
| DEFINE2 | Source | Defines preprocessor names on the command line. |
| DISABLE | Object | Disables interrupts for the duration of a single function. |
| EJECT | Listing | Inserts a form feed character into the listing file. |
| ENDASM | Source | Marks the end of an inline assembly block. |
| FIXDRK1 | Object | Replaces the INC DRk,#const instruction with an ADD DRk,#const instruction. |
| FLOAT64 | Object | Enables 64-bit (double-precision) floating-point math for double variable types. |
| FLOATFUZZY | Object | Sets the number of bits rounded for floating-point comparisons. |
| FUNCTIONS | Object | Allows the memory model and reentrant attribute to be changed. |
| HPTR | Object | Changes the default memory type to huge for the memory models SMALL, XSMALL, and LARGE. |
| HOLD | Object | Numeric size limits for global variables placed in data, near, and xdata memory. |
| INCDIR1 | Source | Sets additional include file paths. |
| INTERVAL1 | Object | Specifies the interval to use for interrupt vectors. |
| INTR21 | Object | Informs the C251 compiler that the 251 MCU saves the low order 16 bits of the program counter but does not automatically save PSW1 when entering an interrupt. |
| INTVECTOR1 | Object | Specifies the base address for interrupt vectors. |
| LARGE1 | Object | Selects the LARGE memory model. |
| LISTINCLUDE | Listing | Adds contents of include files into the listing file. |
| MAXARGS1 | Object | Specifies the maximum size of variable-length argument lists. |
| MODBIN | Object | Instructs the C251 compiler to generate instructions for the binary mode of the 251. |
| NAME | Object | The name of the object module may be changed. |
| NOALIAS1 | Object | Disable alias checking for pointer access optimization. |
| NOAMAKE1 | Object | Disables AutoMAKE project information records. |
| NVM_CONST1 | Object | Assume that const variables change in value due to in-system programming. |
| NOAASMEXPAND | Object | Prevents expanding symbols used in ASM/ENDASM blocks. |
| NOCASE1 | Object | Convert indentifiers to upper case for the object file. |
| NOCOND1 | Listing | Excludes (from the listing file) conditional source lines skipped by the preprocessor. |
| NOEXTEND1 | Source | Disables C251 extensions to ANSI C. |
| NOINTVECTOR1 | Object | Disables generation of interrupt vectors. |
| NOOBJECT1 | Object | Disables object file generation. |
| NOPRINT1 | Listing | Disables listing file generation. |
| NOREGPARMS | Object | Disables passing parameter in registers. |
| OBJECT1 | Object | Specifies the name for the object file. |
| OBJECTADVANCED1 | Object | Adds additional information to the object file for linker-level program optimizations. |
| OPTIMIZE | Object | Specifies the level of optimization performed by the compiler. |
| ORDER1 | Object | Allocates storage for variables in the order in which they are declared. |
| PACK1 | object | Controls the packing of structure types. |
| PAGELENGTH1 | Listing | Specifies the number of lines on a page in the listing file. |
| PAGEWIDTH1 | Listing | Specifies the number of characters on a line in the listing file. |
| PARM2511 | Object | Use C251 parameter passing conventions (default). |
| PARM511 | Object | Use C51 parameter passing conventions (default). |
| PREPRINT1 | Listing | Produces a preprocessor listing file with expanded macros. |
| PREPRINTONLY1 | Source | Create a preprocessor output file only, no translation and code generation takes place. |
| PRINT1 | Listing | Specifies the name for the listing file. |
| REGFILE1 | Object | Specifies the register definition file for global register optimization. |
| REGPARMS | Object | Enables passing parameter in registers. |
| RENAMECODE | Object | Rename a code segment. |
| RESTORE | Object | Restores settings for REGPARMS, and OPTIMIZE directives. |
| ROM1 | Object | Control generation of JMP/CALL instructions. |
| SAVE | Object | Saves settings for REGPARMS, and OPTIMIZE directives. |
| SMALL1 | Object | Selects the SMALL memory model. |
| SRC1 | Object | Creates an assembler source file instead of an object file. |
| STRING1 | Object | Locates implicit string constants to xdata or far memory. |
| SYMBOLS1 | Listing | Includes a symbol list in the listing file. |
| TABS1 | Listing | Specifies the tab character expansion width for the listing file. |
| TINY1 | Object | Select TINY memory model (Default). |
| UNSIGNED_CHAR1 | Object | Treat plain char as unsigned char. |
| USERCLASS1 | Object | Renames memory classes which allows more flexible variable location. |
| Listing | Change a Warning to an Error or disable a warning. | |
| WARNINGLEVEL1 | Listing | Selects the level of warning detection. |
| XSMALL1 | Object | Select XSMALL memory model. |
| XTINY1 | Object | Select XTINY memory model. |
Note
- These directives apply to the entire source file and may be specified only once on the command line or at the beginning of the source file using the #pragma statement. They may not be used more than once in a source file.
- Directives and arguments, with the exception of arguments specified with the DEFINE directive, are not case sensitive.
| Contact Site Map Press Privacy | Copyright © 2012 ARM Ltd and ARM Germany GmbH. All rights reserved. |
