08-28-2008
如何更改hostid
Atmel offers a broad range of microcontrollers based on the 8051 architecture. The product line includes MCS-51® industry standard socket drop-in devices, In-System Programming capability, and small footprint 20-pin derivatives in ROMless, ROM, OTP & Flash flavors (see on-line selection table). Some of the devices also take advantage of the high-speed core (X2) mode which doubles the internal clock frequency for CPU and peripherals upon selection.
The 8051 derivatives also include Application Specific Products with specialized functions to serve dedicated markets:
CAN Networking
MP3 Applications
Smart Card Readers
USB Applications
Atmel also offers 8/16 bit microcontrollers based on the powerful C251 architecture. Our C251 devices allow a direct and easy performance increase by upgrading existing 80C51-based applications.
Last edited by 12345678; 08-29-2008 at 10:57 AM..
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avra(1) Atmel AVR Assembler avra(1)
NAME
avra - Assembler for the Atmel AVR microcontroller family
SYNOPSIS
avra [-f] [O|M|I|G] output file type
[-o outfile] output file name
[-l listfile] generate list file
[-m mapfile] generate map file
[--define symbol[=value]] [--includedir dir] [-listmac]
[--max_errors number] [--devices] [--version]
[-h] [--help] general help
infile
DESCRIPTION
AVRA is an assembler for Atmel AVR microcontrollers, and it is almost compatible with Atmel's own assembler AVRASM32. The differences
between the two are:
Support for some extra preprocessor directives.
includes: .define, .undef, .ifdef, .ifndef, .if, .else, .endif, .elif, .warning
Not all command line options are supported.
Specifying an eeprom file (-e) is not supported. All eeprom data is put out into a file called program.eep.hex and always Intel hex
format. Other hex file formats than Intel are currently not supported.
Forward references are not supported.
Like in C, you have to define everything before you are using it, excepting labels. This makes sure, that directives like .ifdef and
.undef are working properly. If you are familiar with the C programming language, you should get easily into AVRA. See chapter "Pro-
gramming techniques" for more information about how to write proper code.
Enhanced macro support.
AVRA has some new features for writing flexible macros. This should increase the ability to reuse code e.g. build your own library.
Debugging support.
AVRA creates a coff file everytime the assembly was sucessful. This file allows AVR Studio or any coff compatible debugger to simu-
late or emulate the program.
Meta tags for assembly time.
This helps you tracking versions of your software and can also be used to generate customer specific serial numbers.
OPTIONS
Several option can be given after one '-', but if an option requires an argument; the argument must be given after that option.
--listfile, -l
Create list file
--mapfile, -m
Create map file
--define, -D
Define symbol.
--includedir, -I
Additional include dirs.
--listmac
List macro expansion in listfile.
--max_errors
Maximum number of errors before exit (default: 10)
--devices
List out supported devices.
--version
Version information.
--help, -h
Show summary of options.
SEE ALSO
avrp(1)
AUTHOR
The initial version of AVRA was written by John Anders Haugum. He released all versions until v0.7. All later versions were released by
Tobias Weber.
Atmel AVR Assembler Jan 23, 2006 avra(1)