Joe,

Just noticed that you have already said so. My brain is too slow today
and need some optimization too.

-- OCY

--- In m..., "old_cow_yellow"
wrote:
>
> Joe,
>
> I think Aniket does not have a problem between his MSP430 and the LCD
> unit. His problem is between the LCD and his eyes. A sequence of LCD
> images goes by and he cannot read but the individual frames.
>
> He tried to put delay loops in between frames, but the compiler
> optimized the delay loops out.
>
> -- OCY
>
> --- In m..., Joe Radomski wrote:
> >
> > most lcds are quite forgiving so an exact delay is not necessary,
> its usually important to meet the minimum delays required for each
> command..
> >
> > I've never had any problems using the dco...
> >
> > You should really measure the timings of your pulses.. invest in a
> logic analyzer even a cheap one.. fors simple MC development..
> something like this will work..
> >
> > http://www.sparkfun.com/commerce/product_info.php?products_id38
> >
> > the oly thing to watch out for is that the v high is not adjustable,
> so your VCC has to be set so that at a minimum 2.0v is high.. if you
> keep the current on any individual output to about 4ma or less 2.2v is
> about the safe miniimum.. more current than this and you need to bump
> up the voltage..
> >
> >
> >
> >
> >
> > --- On Sat, 12/20/08, aniket patwardhan wrote:
> >
> > From: aniket patwardhan
> > Subject: Re: [msp430] about lcd interfacing
> > To: m...
> > Date: Saturday, December 20, 2008, 2:42 AM
> >
> >
> >
> >
> >
> >
> > i could manage this all but i think the problem is with clock
> > initialization. Please tell me is it better to use dco or not?
> >
> > Aniket
> >
> > On Sat, Dec 20, 2008 at 1:07 PM, Joe Radomski > yahoo.com> wrote:
> > > remember simple delay loops will usually be optimized out.. SO
you can
> > > change them all you want with little effect.. If the code serves
> no useful
> > > purpose the compiler is free to throw it away..
> > >
> > >
> > > use the intrinsic function __delay_cycles found in many of the
msp430
> > > compilers
> > >
> > > __delay_cycles( unsigned long n);
> > >
> > >
> > > n MUST be a constant, this produces inline code..
> > >
> > >
> > > if you want to try a loop use __no_operation( void);
> > > within the loop but be warned the loop may get thrown away by the
> compiler
> > > as stated above..
> > >
> > > to the compiler these two functions may be the same
> > >
> > > void loop(void)
> > > {
> > > ;
> > > }
> > >
> > > and
> > >
> > > void loop2(void)
> > > {
> > > int i;
> > > for(i= 0; i < 11; i++)
> > > {
> > > ;// anything in here thats not used outside of this function
> > > }
> > >
> > > }
> > >
> > > since both functions do not do anything..
> > >
> > > --- On Sat, 12/20/08, aniket patwardhan > gmail.com> wrote:
> > >
> > > From: aniket patwardhan
> > > Subject: Re: [msp430] about lcd interfacing
> > > To: msp430@yahoogroups. com
> > > Date: Saturday, December 20, 2008, 2:05 AM
> > >
> > > hello
> > >
> > > even i could send the data to lcd using 4 bit.my prob is with
delay.i
> > > even used nested loops but when i vary the count it is not
varying.i m
> > > working with MSP430F1611. Please can you send me your initialization
> > > code.
> > >
> > > Aniket
> > >
> > > On Sat, Dec 20, 2008 at 7:16 AM, Thanh Tran > yahoo.com> wrote:
> > >> I could send text from a MSP430F2012 to the LCD using 4 bit with no
> > >> problem.
> > >> The delay between commands or between character was just a simple
> piece of
> > >> code of 2 nested for loops. One thing I found was that make
sure you
> > >> follow
> > >> the initialize sequence, otherwise, sometimes the text shows up
> correctly,
> > >> sometimes it doesn't.
> > >>
> > >> -Thanh
> > >>
> > >> --- On Mon, 12/15/08, aniket patwardhan gmail.com>
> > >> wrote:
> > >> From: aniket patwardhan
> > >> Subject: [msp430] about lcd interfacing
> > >> To: msp430@yahoogroups. com
> > >> Date: Monday, December 15, 2008, 11:08 PM
> > >>
> > >> hello
> > >>
> > >> i am currently working on msp430f1611 and interfacing it with
> > >>
> > >> 5V lcd which is of 44780 type in 4 bit mode.I have written the
> > >>
> > >> functions for writing nibbles into mc.I could display the
characters
> > >>
> > >> on lcd but the delay placed in between is not working.Please
guide me
> > >>
> > >> about time specifications and clock to be used i.e.mclk,smclk. I m
> > >>
> > >> using 32.768 khz crystal.
> > >>
> > >> Thanks
> > >>
> > >> Aniket
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
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> > >>
> > >>
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> > >>
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> >
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