2.3-InternetRadio/nutos/nut/arch/avr32/dev/ostimer_uc3l.c

/*
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// This is the source implementation for model specific
// routines for UC3 family
// Functions here are documented in ostimer.c

/*!
 * \brief Determine the PLL output clock frequency.
 *
 * \param pll Specifies the PLL, 0 for PLL0, 1 for PLL1.
 *
 * \return Frequency of the selected PLL in Hertz.
 */

/*!
 * \brief Determine the processor clock frequency.
 *
 * \return CPU clock frequency in Hertz.
 */

uint32_t NutArchClockGet(int idx)
{
    uint32_t rc = AVR32_PM_PBA_MAX_FREQ;

    if (idx == NUT_HWCLK_CPU || idx == NUT_HWCLK_PERIPHERAL_HSB) {
        rc = 50000000;
    } else if (idx == NUT_HWCLK_PERIPHERAL_A) {
        /* Get PBA Clock */
        rc = 50000000 / 2;

    } else if (idx == NUT_HWCLK_PERIPHERAL_B) {
        /* Get PBB Clock */
        rc = 50000000 / 2;
    } else if (idx == NUT_HWCLK_SLOW_CLOCK) {
        /* Can be changed using the RCCR register
           but there is no information on the datasheet yet
           on how to do so. Therefore we don't know how to calculate
           non-default values yet. */
#if defined( __AVR32_AP7000__ )
        rc = 32768;             // AP7000 has no constant for slow clock, but this is the same as XIN32, which should be 32768hz
#else
        rc = 0;
#endif
    }

    return rc;
}