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Man Pages

Manual Reference Pages  -  GPASM (1)


gpasm - GNU PIC assembler


See Also


gpasm [options] file


The information in this man page is an extract from the full documentation of gputils and is limited to the meaning of the options. For complete and current documentation, refer to "" located in the gputils docs directory.


gpasm is an assembler for Microchip (TM) PIC (TM) micro-controllers. It’s intended to be compatible with the manufacturer’s MPASM assembler. gpasm is part of gputils. Check the gputils(1) manpage for details on other GNU PIC utilities.


Below is a summary of the gpasm options. gpasm options always supersede any settings in the source code.
-a FMT,--hex-formatFMT
  GPASM supports inhx8m, inhx8s, inhx16, and inhx32 hex file formats. This option controls which hex file format is used. The default is inhx32.
-c, --object
  Output a relocatable object (new COFF format).
-C, --old-coff
  Output a relocatable object (old COFF format).
-d, --debug
  Output debug messages.
-D SYM=VAL, --define SYM=VAL
  Define SYM with value VAL. This is equivalent to placing "#define SYM VAL" in the source.
-e [ON|OFF], --expand [ON|OFF]
  Macro expansion in the listing file is controlled using the EXPAND and NOEXPAND directives. This option can force either directive to be ignored. When "ON" is selected the macros are always expanded regardless of the presence of NOEXPAND. Likewise, "OFF" will force macros not to be expanded.
-f, --full-address
  Show full address in .lst file at the memory map region.
-g, --debug-info
  Use debug directives for COFF.
-h, --help
  Show the usage message and exit.
-i, --ignore-case
  All user defined symbols and macros are case sensitive. This option makes them case insensitive.
-I DIR, --include DIR
  The top level assembly file is passed to gpasm as an argument. This file can contain INCLUDE directives. These directives open the specified file and then its contents are assembled. GPASM searches for these files in the local directory. If the file is not located, the default header path is checked. Finally, all paths specified using this argument are searched.
-j, --sdcc-dev16-list
  Help to the extension of the pic16devices.txt file in the sdcc project. Using by itself, displays the all ’16e’ devices. Along with the ’-p’ option, shows only the specified device.
-k, --error
  Enables creation of the error file.
-l[12[ce]|14[cef]|16[ce]], --list-chips[=([12[ce]|14[cef]|16[ce]])]
  List supported processors based on various aspects. (f => x)
-L, --force-list
  Ignore NOLIST directives. This forces gpasm to print every line assembled in the list file output.
-m, --dump
  Upon completion of the final pass of assembly, display the contents of instruction memory.
  This option sets the MPASM compatibility mode.
-M, --deps
  Output a dependency file.
-n, --dos
  By default, gpasm generates hex files using ISO format. However, some device programmers required a DOS formatted file. This option will cause gpasm to generate a DOS formatted hex file.
-o FILE, --output FILE
  Alternate name of output files. Option effect of:    -- If the "-c" option included in the command line:    FILE.o, FILE.lst, FILE.err    (The "FILE.o" should specified.)    -- If the "-c" option not included in the command line:    FILE.hex, FILE.cod, FILE.lst, FILE.err    (The "FILE.hex" should specified.)
-p PROC, --processor PROC
  Select the processor.
-P FILE, --preprocess FILE
  Write preprocessed asm file to FILE.
-q, --quiet
  Suppress anything sent to standard output.
-r RADIX, --radix RADIX
  The supported radices are BIN, DEC, OCT, and HEX. The default is HEX.

Lists properties of the processors. Using by itself, displays the all devices or group of the devices. Along with the ’-p’ option, shows only the specified device. (f => x)

-S [0|1|2], --strict [0|1|2]
  Set the strict level of the recommended instruction-parameters (W or F and A or B). The "strict messages" have higher priority than the warnings. (See: -w [0|1|2]) [0]    0: Is the default. No strict messages.    1: Show warning messages if one of is missing.    2: Show error messages if one of is missing.
-t, --sdcc-dev14-list
  Help to the extension of the pic14devices.txt file in the sdcc project. Using by itself, displays the all ’14’ and ’14e’ devices. Along with the ’-p’ option, shows only the specified device.
  If this is set, then an option may not be parameter of an another option. For example: -I -c
-u, --absolute
  Use absolute paths.
-v, --version
  Show the version information and exit.
-w [0|1|2], --warning [0|1|2]
  This option sets the message level.    0: Is the default. It will allow all messages, warnings and errors to be reported.    1: Will suppress the messages.    2: Will suppress the messages and warnings.
-y, --extended
  Enable 18xx extended mode.




Craig Franklin <>


Copyright (C) 2002, 2003, 2004, 2005 James Bowman, Craig Franklin

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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gputils-1.4.2 GPASM (1) 2014-05-01

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