From kris at abbey.co.nz  Thu May  7 17:53:48 2009
From: kris at abbey.co.nz (Kris Heidenstrom)
Date: Thu May  7 19:02:10 2009
Subject: [Icc-430] reading status register?
In-Reply-To: <49F56B25.3080502@sensair.com>
References: <30316713.2342381239916249096.JavaMail.servlet@kundenserver>
	<49F56B25.3080502@sensair.com>
Message-ID: <4A03829C.5040406@abbey.co.nz>

Peter Lissenburg wrote:

> Hi All,
>     sorry, but I have a probably silly question.
> I need to check the state of the status register.
> Doing...
> unsigned char SR;
>     asm("mov %SR, R2");
> ICC430 doesn't work, any suggestions?

If you're trying to _read_ SR then you should
say "mov R2,%SR" because the MSP430 instruction
syntax is "source,destination" and you want to
move from R2 (the actual status register) to
the variable you've named "SR". Perhaps if you
called your variable something else like SR_val
this mistake would be easier to pick up.

Regards

Kris
-- 
Kris Heidenstrom       Embedded systems designer / programmer
kris@abbey.co.nz       Abbey Systems Ltd - Telemetry Specialists
Wellington NEW ZEALAND  Voice +64-4-385-6611  Fax +64-4-385-6848