Microchip Technology XC8 Standard Compiler (Workstation) SW006021-1 SW006021-1 User Manual
Product codes
SW006021-1
XC8 Command-line Driver
2012 Microchip Technology Inc.
DS52053B-page 105
• The options following fill_expr result in the following behavior:
- @unused (or nothing) fill all unused memory with fill_expr; i.e.,
--
FILL
=0xBEEF@unused
fills all unused memory with 0xBEEF. The driver
will expand this to the appropriate ranges and pass these to HEXMATE.
- @address fill a specific address with fill_expr; i.e.,
--
FILL
=0xBEEF@0x1000
puts 0xBEEF at address 1000h
- @address:end_address fill a range of memory with fill_expr; i.e.,
--
FILL
=0xBEEF@0:0xFF
puts 0xBEEF in unused addresses between 0 and
255
All constants can be expressed in (unsigned) binary, octal, decimal or hexadecimal, as
per normal C syntax, so for example 1234 is a decimal value, 0xFF00 is hexadecimal
and FF00 is illegal.
per normal C syntax, so for example 1234 is a decimal value, 0xFF00 is hexadecimal
and FF00 is illegal.
See Section 4.9 “MPLAB IDE V8 Universal Toolsuite Equivalents” or
Section 4.10 “MPLAB X Universal Toolsuite Equivalents” for use of this option in
MPLAB IDE.
Section 4.10 “MPLAB X Universal Toolsuite Equivalents” for use of this option in
MPLAB IDE.
4.8.31
--FLOAT: Select Kind of Float Types
This option allows the size of float types to be selected. The types available to be
selected are given in Table 4-11.
selected are given in Table 4-11.
See also the --DOUBLE option in Section 4.8.24 “--DOUBLE: Select Kind of Double
Types”.
Types”.
See Section 4.9 “MPLAB IDE V8 Universal Toolsuite Equivalents” or
Section 4.10 “MPLAB X Universal Toolsuite Equivalents” for use of this option in
MPLAB IDE.
Section 4.10 “MPLAB X Universal Toolsuite Equivalents” for use of this option in
MPLAB IDE.
4.8.32
--GETOPTION: Get Command-line Options
This option is used to retrieve the command line options which are used for named
compiler application. The options are then saved into the given file. This option is not
required for most projects, and is disabled when the compiler is operating in Free mode
(see Section 4.8.37 “--MODE: Choose Compiler Operating Mode”).
compiler application. The options are then saved into the given file. This option is not
required for most projects, and is disabled when the compiler is operating in Free mode
(see Section 4.8.37 “--MODE: Choose Compiler Operating Mode”).
The options take an application name and a filename to store the options, for example:
--GETOPTION=hlink,options.txt
4.8.33
--HELP: Display Help
This option displays information on the xc8 compiler options. The option --HELP will
display all options available. To find out more about a particular option, use the option’s
name as a parameter. For example:
display all options available. To find out more about a particular option, use the option’s
name as a parameter. For example:
xc8 --help=warn
will display more detailed information about the --WARN option, the available
suboptions, and which suboptions are enabled by default.
suboptions, and which suboptions are enabled by default.
TABLE 4-11:
FLOATING-POINT SELECTIONS
Suboption
Effect
double
Size of float matches size of double type
24
24-bit float (default)
32
32-bit float (IEEE754)