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//! Reset reason
//!
//! MCXA families keep the most recent reset reason in the SRS
//! register of the CMC block. This lets users understand why the MCU
//! has reset and take appropriate corrective actions if required.
/// Reads the most recent reset reason from the Core Mode Controller
/// (CMC).
pub fn reset_reason() -> ResetReason {
critical_section::with(|_| {
let regs = unsafe { &*crate::pac::Cmc::steal() };
let srs = regs.srs().read();
if srs.wakeup().is_enabled() {
ResetReason::WakeUp
} else if srs.por().bit_is_set() {
ResetReason::Por
} else if srs.vd().bit_is_set() {
ResetReason::VoltageDetect
} else if srs.warm().bit_is_set() {
ResetReason::Warm
} else if srs.fatal().bit_is_set() {
ResetReason::Fatal
} else if srs.pin().bit_is_set() {
ResetReason::Pin
} else if srs.dap().bit_is_set() {
ResetReason::Dap
} else if srs.rstack().bit_is_set() {
ResetReason::ResetAckTimeout
} else if srs.lpack().bit_is_set() {
ResetReason::LowPowerAckTimeout
} else if srs.scg().bit_is_set() {
ResetReason::SystemClockGeneration
} else if srs.wwdt0().bit_is_set() {
ResetReason::Wwdt0
} else if srs.sw().bit_is_set() {
ResetReason::Software
} else if srs.lockup().bit_is_set() {
ResetReason::Lockup
} else if srs.cdog0().bit_is_set() {
ResetReason::Cdog0
} else if srs.cdog1().bit_is_set() {
ResetReason::Cdog1
} else if srs.jtag().bit_is_set() {
ResetReason::Jtag
} else {
ResetReason::Tamper
}
})
}
/// Indicates the type and source of the most recent reset.
#[derive(Clone, Copy, Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
#[non_exhaustive]
pub enum ResetReason {
/// Tamper reset.
Tamper,
/// JTAG System Reset request.
Jtag,
/// Code Watchdog 0 reset.
Cdog0,
/// Code Watchdog 1 reset.
Cdog1,
/// Lockup reset.
Lockup,
/// Software reset.
Software,
/// Windowed Watchdog 0 reset.
Wwdt0,
/// System clock generation reset.
SystemClockGeneration,
/// Low Power Acknowledge Timeout reset.
LowPowerAckTimeout,
/// Reset Timeout.
ResetAckTimeout,
/// Debug Access Port reset.
Dap,
/// External assertion of RESET_b pin.
Pin,
/// Fatal reset.
Fatal,
/// Warm reset.
Warm,
/// Voltage detect reset.
VoltageDetect,
/// Power-on reset.
Por,
/// Wake-up reset.
WakeUp,
}
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