/** Frees the RTC * * @param[void] void */ void rtc_free(void) { if (rtc_inited) { /* Disable the RTC module */ rtc_count_disable(&rtc_instance); /* Disable the RTC clock */ system_gclk_chan_disable(RTC_GCLK_ID); rtc_inited = 0; } }
/** * \brief Writes a Generic Clock configuration to the hardware module. * * Writes out a given configuration of a Generic Clock configuration to the * hardware module. If the clock is currently running, it will be stopped. * * \note Once called the clock will not be running; to start the clock, * call \ref system_gclk_chan_enable() after configuring a clock channel. * * \param[in] channel Generic Clock channel to configure * \param[in] config Configuration settings for the clock * */ void system_gclk_chan_set_config( const uint8_t channel, struct system_gclk_chan_config *const config) { /* Sanity check arguments */ Assert(config); /* Disable generic clock channel */ system_gclk_chan_disable(channel); /* Configure the peripheral channel */ GCLK->PCHCTRL[channel].reg = GCLK_PCHCTRL_GEN(config->source_generator); }
/** * \brief Writes an External Interrupt NMI channel configuration to the hardware module. * * Writes out a given configuration of an External Interrupt NMI channel * configuration to the hardware module. If the channel is already configured, * the new configuration will replace the existing one. * * \param[in] nmi_channel External Interrupt NMI channel to configure * \param[in] config Configuration settings for the channel * * \returns Status code indicating the success or failure of the request. * \retval STATUS_OK Configuration succeeded * \retval STATUS_ERR_PIN_MUX_INVALID An invalid pinmux value was supplied * \retval STATUS_ERR_BAD_FORMAT An invalid detection mode was requested */ enum status_code extint_nmi_set_config( const uint8_t nmi_channel, const struct extint_nmi_conf *const config) { /* Sanity check arguments */ Assert(config); /* Sanity check clock requirements */ Assert(!(!system_gclk_gen_is_enabled(EXTINT_CLOCK_SOURCE) && _extint_is_gclk_required(config->filter_input_signal, config->detection_criteria))); struct system_pinmux_config pinmux_config; system_pinmux_get_config_defaults(&pinmux_config); pinmux_config.mux_position = config->gpio_pin_mux; pinmux_config.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; pinmux_config.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->gpio_pin_pull; system_pinmux_pin_set_config(config->gpio_pin, &pinmux_config); /* Get a pointer to the module hardware instance */ Eic *const EIC_module = _extint_get_eic_from_channel(nmi_channel); uint32_t new_config; /* Determine the NMI's new edge detection configuration */ new_config = (config->detection_criteria << EIC_NMICTRL_NMISENSE_Pos); /* Enable the hardware signal filter if requested in the config */ if (config->filter_input_signal) { new_config |= EIC_NMICTRL_NMIFILTEN; } /* Disable EIC and general clock to configure NMI */ _extint_disable(); system_gclk_chan_disable(EIC_GCLK_ID); EIC_module->NMICTRL.reg = new_config; /* Enable the general clock and EIC after configure NMI */ system_gclk_chan_enable(EIC_GCLK_ID); _extint_enable(); return STATUS_OK; }
/** * \brief Writes a Generic Clock configuration to the hardware module. * * Writes out a given configuration of a Generic Clock configuration to the * hardware module. If the clock is currently running, it will be stopped. * * \note Once called the clock will not be running; to start the clock, * call \ref system_gclk_chan_enable() after configuring a clock channel. * * \param[in] channel Generic Clock channel to configure * \param[in] config Configuration settings for the clock * */ void system_gclk_chan_set_config( const uint8_t channel, struct system_gclk_chan_config *const config) { /* Sanity check arguments */ Assert(config); /* Cache the new config to reduce sync requirements */ uint32_t new_clkctrl_config = (channel << GCLK_CLKCTRL_ID_Pos); /* Select the desired generic clock generator */ new_clkctrl_config |= config->source_generator << GCLK_CLKCTRL_GEN_Pos; /* Disable generic clock channel */ system_gclk_chan_disable(channel); /* Write the new configuration */ GCLK->CLKCTRL.reg = new_clkctrl_config; }
/** * \brief Writes an External Interrupt NMI channel configuration to the hardware module. * * Writes out a given configuration of an External Interrupt NMI channel * configuration to the hardware module. If the channel is already configured, * the new configuration will replace the existing one. * * \param[in] nmi_channel External Interrupt NMI channel to configure * \param[in] config Configuration settings for the channel * * \returns Status code indicating the success or failure of the request. * \retval STATUS_OK Configuration succeeded * \retval STATUS_ERR_PIN_MUX_INVALID An invalid pin mux value was supplied * \retval STATUS_ERR_BAD_FORMAT An invalid detection mode was requested */ enum status_code extint_nmi_set_config( const uint8_t nmi_channel, const struct extint_nmi_conf *const config) { /* Sanity check arguments */ Assert(config); /* Sanity check clock requirements */ Assert(!(!system_gclk_gen_is_enabled(EXTINT_CLOCK_SOURCE) && _extint_is_gclk_required(config->filter_input_signal, config->detection_criteria))); struct system_pinmux_config pinmux_config; system_pinmux_get_config_defaults(&pinmux_config); pinmux_config.mux_position = config->gpio_pin_mux; pinmux_config.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; pinmux_config.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->gpio_pin_pull; system_pinmux_pin_set_config(config->gpio_pin, &pinmux_config); /* Get a pointer to the module hardware instance */ Eic *const EIC_module = _extint_get_eic_from_channel(nmi_channel); uint32_t new_config; /* Determine the NMI's new edge detection configuration */ new_config = (config->detection_criteria << EIC_NMICTRL_NMISENSE_Pos); /* Enable the hardware signal filter if requested in the config */ if (config->filter_input_signal) { new_config |= EIC_NMICTRL_NMIFILTEN; } #if (SAML21XXXB) || (SAML22) || (SAMC21) || (SAMR30) /* Enable asynchronous edge detection if requested in the config */ if (config->enable_async_edge_detection) { new_config |= EIC_NMICTRL_NMIASYNCH; } #endif /* Disable EIC and general clock to configure NMI */ _extint_disable(); #if(EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) system_gclk_chan_disable(EIC_GCLK_ID); #else Eic *const eics[EIC_INST_NUM] = EIC_INSTS; for (uint32_t i = 0; i < EIC_INST_NUM; i++){ eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_GCLK; system_gclk_chan_disable(EIC_GCLK_ID); } #endif EIC_module->NMICTRL.reg = new_config; /* Enable the EIC clock and EIC after configure NMI */ #if(EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) system_gclk_chan_enable(EIC_GCLK_ID); #else for (uint32_t i = 0; i < EIC_INST_NUM; i++){ eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_ULP32K; } #endif _extint_enable(); return STATUS_OK; }