Module imxrt_hal::srtc [−][src]
Expand description
Secure Real-Time Clock
Basic support only: Supports enabling and setting the clock, but not any of its more advanced features (alarm, calibration, stop on security violation, etc).
The Secure Real-Time Clock continues tracking time until it is specifically disabled or loses power, even through a system reboot (and potentially a loss of power to the system, if the SRTC is connected to a battery).
Example
use imxrt_hal;
let mut peripherals = imxrt_hal::Peripherals::take().unwrap();
let mut srtc = peripherals.srtc.enable_and_set(&mut peripherals.ccm.handle, 1600000000, 0);
// Interpreted as Unix time: Sep 13 2020 12:26:40.000
let now = srtc.get();
Teensy 4.x Note
When the SRTC is enabled, setting the board into program mode then using the Teensy Loader application (GUI) to reboot it will set the current time (Unix epoch, but time in local timezone). This will overwrite whatever time you may have previously set and is ambiguous around the backwards daylight savings transition point.
Structs
Enums
Indicates the result of the try_enable
method
Functions
Converts the number of microseconds that have occurred since a second into clock ticks (1/32768 of a second).