Merge pull request #3645 from wackazong/power-wake-on-field

Add System Off and Wake on Field

3 files changed, 23 insertions, 0 deletions

diff --git a/embassy-nrf/src/lib.rs b/embassy-nrf/src/lib.rs
index e7ec4eb9d..ec5e9f864 100644
--- a/embassy-nrf/src/lib.rs
+++ b/embassy-nrf/src/lib.rs
@@ -107,6 +107,9 @@ pub mod nvmc;
 ))]
 pub mod pdm;
 #[cfg(not(feature = "_nrf54l"))] // TODO
+#[cfg(any(feature = "nrf52840", feature = "nrf9160-s", feature = "nrf9160-ns"))]
+pub mod power;
+#[cfg(not(feature = "_nrf54l"))] // TODO
 pub mod ppi;
 #[cfg(not(feature = "_nrf54l"))] // TODO
 #[cfg(not(any(
diff --git a/embassy-nrf/src/nfct.rs b/embassy-nrf/src/nfct.rs
index cbd3920ee..8b4b6dfe0 100644
--- a/embassy-nrf/src/nfct.rs
+++ b/embassy-nrf/src/nfct.rs
@@ -19,6 +19,7 @@ pub use vals::{Bitframesdd as SddPat, Discardmode as DiscardMode};
 
 use crate::interrupt::InterruptExt;
 use crate::pac::nfct::vals;
+use crate::pac::NFCT;
 use crate::peripherals::NFCT;
 use crate::util::slice_in_ram;
 use crate::{interrupt, pac, Peripheral};
@@ -420,3 +421,8 @@ impl<'d> NfcT<'d> {
         Ok(n)
     }
 }
+
+/// Wake the system if there if an NFC field close to the antenna
+pub fn wake_on_nfc_sense() {
+    NFCT.tasks_sense().write_value(0x01);
+}
diff --git a/embassy-nrf/src/power.rs b/embassy-nrf/src/power.rs
new file mode 100644
index 000000000..f93bf8f49
--- /dev/null
+++ b/embassy-nrf/src/power.rs
@@ -0,0 +1,14 @@
+//! Power
+
+#[cfg(feature = "nrf52840")]
+use crate::chip::pac::POWER;
+#[cfg(any(feature = "nrf9160-s", feature = "nrf9160-ns"))]
+use crate::chip::pac::REGULATORS;
+
+/// Puts the MCU into "System Off" mode with minimal power usage
+pub fn set_system_off() {
+    #[cfg(feature = "nrf52840")]
+    POWER.systemoff().write(|w| w.set_systemoff(true));
+    #[cfg(any(feature = "nrf9160-s", feature = "nrf9160-ns"))]
+    REGULATORS.systemoff().write(|w| w.set_systemoff(true));
+}