[Tinyos-help] [Tinyos-devel] what version of Gcc should I be using? Possible bug?

[Janos Sallai]

Eric,

 

I can't help you, but I suspect that the gcc you're using to compile the
MCU application is not version 4.1.2. To get ncc spit out the correct
gcc version you need to type "ncc --version -target=telosb" (replacing
telosb with whatever mote you're using).

 

Also, in the future, please post such questions to tinyos-help instead
of tinyos-devel.

 

Janos

 

From: tinyos-devel-bounces at millennium.berkeley.edu
[mailto:tinyos-devel-bounces at millennium.berkeley.edu] On Behalf Of Eric
Decker
Sent: Tuesday, May 20, 2008 2:38 AM
To: tinyos-devel at millennium.berkeley.edu
Subject: [Tinyos-devel] what version of Gcc should I be using? Possible
bug?

 

I've been chasing a problem where the following code doesn't do the
right thing.

 

  bool isSetSCCI() {

    return (TACCTL2 & SCCI);

  }

 

SCCI has the value 0x0400 (bit 10 of TACCTLx).  I would expect this to
return 0x0400 if

SCCI is set and 0 otherwise.  The code generated both with and without
optimization is

given below.  It basically does nothing.  Am I missing something?  (As I
get older my

brain definitely misses things....)

 

(gdb) x/3i 460c

0x460c <GPSByteCollectP$isSetSCCI>:     mov     &0x0166,r15     ;src
addr 0x0166

0x4610 <GPSByteCollectP$isSetSCCI+4>:   clr     r15             ;

0x4612 <GPSByteCollectP$isSetSCCI+6>:   ret

 

 

Here is the code I'm running.  I'm a bit dubious of gcc 4.1.2.  What
version should I be

running?

 

cire-laptop (47): ncc --version

ncc: 1.2.4

nescc: 1.2.9

gcc: gcc (GCC) 4.1.2 (Ubuntu 4.1.2-0ubuntu4)

Copyright (C) 2006 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is
NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.

 


-- 
Eric B. Decker
Senior (over 50 :-) Researcher
Autonomous Systems Lab
Jack Baskin School of Engineering
UCSC

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.millennium.berkeley.edu/pipermail/tinyos-help/attachments/20080520/dd19e1bd/attachment.htm