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[avr-chat] Using 32.768Khz crystal for timer 2

From: Ori Idan
Subject: [avr-chat] Using 32.768Khz crystal for timer 2
Date: Wed, 16 Apr 2008 10:30:47 +0300
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);
    TIMSK2 = _BV(TOIE2);    /* enable overflow interrupt */

However no interrupt was generated.
What did I do wrong?

--
Ori Idan

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