コード例 #1
0
ファイル: adc.c プロジェクト: adjih/RIOT
static inline void done(adc_t line)
{
    if (dev(line) == ADC0) {
        bit_clear32(&SIM->SCGC6, SIM_SCGC6_ADC0_SHIFT);
    }
#ifdef ADC1
    else if (dev(line) == ADC1) {
#if defined(SIM_SCGC3_ADC1_SHIFT)
        bit_clear32(&SIM->SCGC3, SIM_SCGC3_ADC1_SHIFT);
#elif defined(SIM_SCGC6_ADC1_SHIFT)
        bit_clear32(&SIM->SCGC6, SIM_SCGC6_ADC1_SHIFT);
#endif
    }
#endif /* ADC1 */
    mutex_unlock(&locks[dev_num(line)]);
}
コード例 #2
0
ファイル: isr_kinetis.c プロジェクト: MichelRottleuthner/RIOT
/**
 * @brief Enable workarounds for some known CPU errata
 */
static inline void cpu_errata_fixes(void)
{
#ifdef SIM_SCGC7_FLEXBUS_SHIFT
    /* K series errata
     * e4218: SIM/FLEXBUS: SIM_SCGC7[FLEXBUS] bit should be cleared when the
     * FlexBus is not being used.
     *
     * Description: The SIM_SCGC7[FLEXBUS] bit is set by default. This means
     * that the FlexBus will be enabled and come up in global chip select mode.
     * With some code sequence and register value combinations the core could
     * attempt to prefetch from the FlexBus even though it might not actually
     * use the value it prefetched. In the case where the FlexBus is
     * unconfigured, this can result in a hung bus cycle on the FlexBus.
     *
     * Workaround: If the FlexBus is not being used, disabled the clock to the
     * FlexBus during chip initialization by clearing the SIM_SCGC7[FLEXBUS] bit.
     * If the FlexBus will be used, then enable at least one chip select as
     * early in the chip initialization process as possible.
     */
    bit_clear32(&SIM->SCGC7, SIM_SCGC7_FLEXBUS_SHIFT);
#endif
#ifdef RSIM
    /* KW41Z errata
     * e10224: RSIM: XTAL_OUT_EN signal from the pin is enabled by default
     *
     * Description: The XTAL_OUT_EN signal from the default XTAL_OUT_EN pin,
     * PTB0, is enabled out of reset. This will result in the reference
     * oscillator being enabled when this pin is asserted high regardless of the
     * port control multiplexor setting.
     *
     * Workaround: To prevent the pin from enabling the XTAL out feature
     * unintentionally, set RSIM_RF_OSC_CTRL[RADIO_EXT_OSC_OVRD_EN]=1.
     */
    bit_set32(&RSIM->RF_OSC_CTRL, RSIM_RF_OSC_CTRL_RADIO_EXT_OSC_OVRD_EN_SHIFT);
#endif
}