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Re: [avr-gcc-list] AT90CAN128 support

From: Ned Konz
Subject: Re: [avr-gcc-list] AT90CAN128 support
Date: Thu, 2 Feb 2006 17:54:29 -0800

On Feb 2, 2006, at 1:37 PM, Rob Prowel wrote:

OK.  So I'm sure someone has already brought this up
but I'm new to the list so I have to ask.

Is anyone working on adding support for the AT90CANxxx
chips to avr-gcc, specifically under the UNIX/Linux

It seems to support the at90can128 (which I think is the only one of the family currently available).
Here's what happens on my Mac when I ask my gcc what it supports:

neds_mini:~ $ avr-gcc --target-help

Target specific options:
  -msize                    Output instruction sizes to the asm file
-mshort-calls Use rjmp/rcall (limited range) on >8K devices
  -mno-tablejump            Do not generate tablejump insns
-mtiny-stack Change only the low 8 bits of the stack pointer -mcall-prologues Use subroutines for function prologue/ epilogue -mno-interrupts Change the stack pointer without disabling interrupts
  -mint8                    Assume int to be 8 bit integer
  -mmcu=                    Specify the MCU name
  -minit-stack=             Specify the initial stack address

There are undocumented target specific options as well.
AVR options:
  -mmcu=[avr-name] select microcontroller variant
                   [avr-name] can be:
                   avr1 - AT90S1200, ATtiny1x, ATtiny28
                   avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22
                   avr3 - ATmega103, ATmega603
                   avr4 - ATmega83, ATmega85
                   avr5 - ATmega161, ATmega163, ATmega32, AT94K
                   or immediate microcontroller name.
  -mall-opcodes    accept all AVR opcodes, even if not supported by MCU
  -mno-skip-bug    disable warnings for skipping two-word instructions
                   (default for avr4, avr5)
  -mno-wrap        reject rjmp/rcall instructions with 8K wrap-around
                   (default for avr3, avr5)
Known MCU names:
avr1 avr2 avr3 avr4 avr5 at90s1200 attiny10 attiny11 attiny12 attiny15
  attiny28 at90s2313 at90s2323 at90s2333 at90s2343 attiny22 attiny26
  at90s4433 at90s4414 at90s4434 at90s8515 at90s8535 at90c8534 at86rf401
attiny13 attiny2313 atmega603 atmega103 at43usb320 at43usb355 at76c711
  atmega48 atmega8 atmega83 atmega85 atmega88 atmega8515 atmega8535
  atmega16 atmega161 atmega162 atmega163 atmega165 atmega168 atmega169
  atmega32 atmega323 atmega325 atmega3250 atmega64 atmega128 atmega645
  atmega6450 at90can128 at94k
  no emulation specific options.

And it looks like avr-libc also knows about them (well, at least the at90can128) too:

neds_mini:~ ned$ find /sw/share/avr/ -iname "*can*"

neds_mini:~ ned$ fink info avr-libc
Information about 5329 packages read in 9 seconds.

avr-libc-1.4.0-1: AVR LIBC for GNU GCC & GNU binutils
     This is AVR-LIBC. It is a C library implementation for use with
GNU GCC and GNU binutils for development of programs for Atmel's AVR
Maintainer: Matthias Ringwald <address@hidden>

neds_mini:~ ned$ fink info avr-gcc
Information about 5329 packages read in 2 seconds.

avr-gcc-4.0.2-2: GNU GCC for ATMEL AVR micro controllers
Web site: http://gcc.gnu.org/
Maintainer: Matthias Ringwald <address@hidden>

I compiled my own, of course.

Ned Konz

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