Hi everybody

I'm facing a little problem with a MSP430F449:
I want to use the XT2 clock with 8MHz crystal as MCLK.
I am checking the MCLK via P1.1 and it does not change, when the
following procedure is executed :

	FLL_CTL1&=~0x20;	// turn on XT2 oscillator
	while (FLL_CTL0&0x08);	// wait for XT2 to stabilise
	FLL_CTL1|=0x10;		// select XT2 as MCLK
	
	P1SEL=0x22;		// output MCLK and ACLK
	P1DIR=0x22;		// set pin for output direction

What am I missing ?

Christian

Hi again

please ignore my posting.

I got it running now. Found an answer in an old message in the list!

Sorry

Christian

On Tue, 2003-07-08 at 15:23, Christian Epp wrote:
> Hi everybody
> 
> I'm facing a little problem with a MSP430F449:
> I want to use the XT2 clock with 8MHz crystal as MCLK.
> I am checking the MCLK via P1.1 and it does not change, when the
> following procedure is executed :
> 
> 	FLL_CTL1&=~0x20;	// turn on XT2 oscillator
> 	while (FLL_CTL0&0x08);	// wait for XT2 to stabilise
> 	FLL_CTL1|=0x10;		// select XT2 as MCLK
> 	
> 	P1SEL=0x22;		// output MCLK and ACLK
> 	P1DIR=0x22;		// set pin for output direction
> 
> What am I missing ?
> 
> Christian
> 
> 
> 
> 
> .
> 
>  
> 
> ">http://docs.yahoo.com/info/terms/ 
> 
> 
> 
-- 
Christian Epp
Dipl.Ing.(FH)

R&D Beluk GmbH 
Taubenstrasse 1 
86956 Schongau
+49-(0)8861-2332-40 

Christian Epp wrote:

> Hi everybody
> 
> I'm facing a little problem with a MSP430F449:
> I want to use the XT2 clock with 8MHz crystal as MCLK.
> I am checking the MCLK via P1.1 and it does not change, when the
> following procedure is executed :
> 
> 	FLL_CTL1&=~0x20;	// turn on XT2 oscillator
> 	while (FLL_CTL0&0x08);	// wait for XT2 to stabilise
> 	FLL_CTL1|=0x10;		// select XT2 as MCLK
> 	
> 	P1SEL=0x22;		// output MCLK and ACLK
> 	P1DIR=0x22;		// set pin for output direction
> 
> What am I missing ?
> 
> Christian

Relating this to assembler (my low level language of choice), you 
haven't cleared the clock fault flag.

Al