Hi Ori,
Ok, so you need to connect the 32kHz crystal to the TOSC1 and TOSC2
pins, not the XTAL pins..
Regards
Neil Davey
[EMAIL PROTECTED] wrote:
Thank you for your answer,
I have enabled global interrupt flag (I did get interrupts from the
serial port)
I would like to use the crystal only for the timer.
the CPU itself is running on the internal oscillator (default).
--
Ori Idan
On Wed, Apr 16, 2008 at 10:43 AM, Neil Davey <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi Ori,
[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> wrote:
I have a simple system with 32.768Khz crystal connected to
XTAL1 and XTAL2
Do I need a special operation to enable it?
I did the following initializations in order to get a 1sec
interrupt:
TCCR2B = 0x05; /* Osc/128 prescaler */
ASSR = _BV(AS2);
Doesn't this attach the timer clock to TOSC pin(s)?
TIMSK2 = _BV(TOIE2); /* enable overflow interrupt */
However no interrupt was generated.
What did I do wrong?
Are you setting the global interrupt flag? sei()
--
Ori Idan
Are you wanting to run the whole micro from the 32K crystal, or
just the timer?
Regards
Neil Davey
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Neil Davey
Griffith University
Centre for Wireless Monitoring and Applications
Griffith School of Engineering
Nathan Campus
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Fax: 07-3735-5112
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