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Include Files
The include files that are provided with the Cx51 standard library are found in the INC subdirectory. These files contain constant and macro definitions, type definitions, and function prototypes. The following sections describe the use and contents of each include file. Macros and functions included in the file are listed as well.
8051 Special Function Register Include Files
The Cx51 compiler package provides you with a number of include files that define manifest constants for the special function registers found on many 8051 derivatives. These files can be found in the folder KEIL\C51\INC and the sub-folders. For example, the Special Function Registers (SFR) of the Philips 80C554 device are defined in the file KEIL\C51\INC\PHILIPS\REG554.H.
Within the µVision2 editor context menu that opens on a right mouse click in an editor window, you can insert the SFR defintion that matches the selected device.
SFR definition files for all 8051 variants can be downloaded from www.keil.com. The device database available on this web page contains the header file for the Special Function Registers file of almost all 8051 devices.
80C517.H
The 80C517.H include file contains routines that use the enhanced operational features of the 80C517 CPU and its derivatives. These routines are:
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acos517 |
log10517 |
sqrt517 |
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asin517 |
log517 |
sscanf517 |
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atan517 |
printf517 |
strtod517 |
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atof517 |
scanf517 |
tan517 |
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cos517 |
sin517 |
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exp517 |
sprintf517 |
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ABSACC.H
The ABSACC.H include file contains definitions for macros that allow you to directly access the different memory areas of the 8051.
CBYTE |
FARRAY |
PBYTE |
CWORD |
FCARRAY |
PWORD |
DBYTE |
FCVAR |
XBYTE |
DWORD |
FVAR |
XWORD |
ASSERT.H
The ASSERT.H include file defines the assert macro you can use to create test conditions in your programs.
CTYPE.H
The CTYPE.H include file contains definitions and prototypes for routines which classify ASCII characters and routines which perform character conversions. The following is a list of these routines:
isalnum |
isprint |
toint |
isalpha |
ispunct |
tolower |
iscntrl |
isspace |
_tolower |
isdigit |
isupper |
toupper |
isgraph |
isxdigit |
_toupper |
islower |
toascii |
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INTRINS.H
The INTRINS.H include file contains prototypes for routines that instruct the compiler to generate in-line intrinsic code.
_chkfloat_ |
_irol_ |
_crol_ |
_iror_ |
_cror_ |
_lrol_ |
_lror_ |
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_nop_ |
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MATH.H
The MATH.H include file contains prototypes and definitions for all routines that perform floating-point math calculations. Other math functions are also included in this file. All of the math function routines are listed below:
abs |
exp |
modf |
acos |
fabs |
pow |
asin |
floor |
sin |
atan |
fmod |
sinh |
atan2 |
fprestore |
sqrt |
cabs |
fpsave |
tan |
ceil |
labs |
tanh |
cos |
log |
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cosh |
log10 |
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SETJMP.H
The SETJMP.H include file defines the jmp_buf type and prototypes the setjmp and longjmp routines which use it.
STDARG.H
The STDARG.H include file defines macros that allow you to access arguments in functions with variable-length argument lists. The macros include:
va_arg |
va_end |
va_start |
In addition, the va_list type is defined in this file.
STDDEF.H
The STDDEF.H include file defines the offsetof macro you can use to determine
the offset of members of a structure.
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STDIO.H
The STDIO.H include file contains prototypes and definitions for stream I/O routines. They are:
getchar |
putchar |
sscanf |
_getkey |
puts |
ungetchar |
gets |
scanf |
vprintf |
printf |
sprintf |
vsprintf |
The STDIO.H include file also defines the EOF manifest constant.
STDLIB.H
The STDLIB.H include file contains prototypes and definitions for the type conversion and memory allocation routines listed below:
atof |
init_mempool |
strtod |
atoi |
malloc |
strtol |
atol |
rand |
strtoul |
calloc |
realloc |
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free |
srand |
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The STDLIB.H include file also defines the NULL manifest constant.
STRING.H
The STRING.H include file contains prototypes for the following string and buffer manipulation routines:
memccpy |
strchr |
strncpy |
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memchr |
strcmp |
strpbrk |
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memcmp |
strcpy |
strpos |
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memcpy |
strcspn |
strrchr |
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memmove |
strlen |
strrpbrk |
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memset |
strncat |
strrpos |
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strcat |
strncmp |
strspn |
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The STRING.H include file also defines the NULL manifest constant.