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Re: [avr-libc-dev] at90can128

From: E. Weddington
Subject: Re: [avr-libc-dev] at90can128
Date: Wed, 30 Jun 2004 09:39:33 -0600

On 30 Jun 2004 at 13:46, Steffen Rose wrote:

> Hi,
> I develop with the WinAVR-2004EX0-bin-install.exe package 
> software for CANopen by using the at90can128.
> The header iocan128.h I updated to version 1.4.
> It works fine with our canary driver.


> Some little questions:
> 1) Within the WinAVR package i don't find the standard 
> header assert.h. Do you add it in a later installation?

AFAICT, no. I don't see an assert.h shipped with 20040404, and not with a later 
release of GCC, and it's not in avr-libc.
> 2)  My first tests I did with 
> WinAVR-20040404-bin-install.exe and -mmcu=atmega128. Now I 
> test with WinAVR-2004EX0-bin-install.exe and 
> -mmcu=at90can128.
> I don't understand, why the first environment compile with 
> an alignment of 2 and the second environment compile with 
> an alignment of 1. Can you give me a hint?
> The complete line I use, is:
> avr-gcc -mmcu=at90can128  -std=gnu99 
> -I/cygdrive/c/winavr/avr/include -funsigned-char 
> -funsigned-bitfields -fpack-struct -fshort-enums -g -c -Os 
> -mcall-prologues -W -Wall  -Wcast-qual -Wcast-align -o 
> obj/can_canary.o -c can_canary.c
I don't know the answer to this one yet. Perhaps another developer can comment 
on this one?
> 3) Additional to the settings in the iocan128.h I added this 
> definitions:
> /* addition definition of 16bit registers */
> #define CANSTM                _SFR_MEM16(0xF8)
> #define CANTTC                _SFR_MEM16(0xE8)
> #define CANTIM                _SFR_MEM16(0xE6)
> #define CANSIT                _SFR_MEM16(0xE0)
> #define CANIE         _SFR_MEM16(0xDE)
> #define CANEN         _SFR_MEM16(0xDC)

These definitions (or very close) are already in the iocan128.h header in avr-
libc CVS. Go to here for the file in CVS (sorry for the wrapped url):


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