/** 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;
}
