Added system off and wake-on-field

2 files changed, 16 insertions, 0 deletions

diff --git a/embassy-nrf/src/lib.rs b/embassy-nrf/src/lib.rs
index e7ec4eb9d..b6283c7f5 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(feature = "nrf52840")]
+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/power.rs b/embassy-nrf/src/power.rs
new file mode 100644
index 000000000..440028380
--- /dev/null
+++ b/embassy-nrf/src/power.rs
@@ -0,0 +1,13 @@
+//! Power
+
+use crate::chip::pac::{NFCT, POWER};
+
+/// Puts the MCU into "System Off" mode with a power usage 0f 0.4 uA
+pub fn set_system_off() {
+    POWER.systemoff().write(|w| w.set_systemoff(true));
+}
+
+/// Wake the system if there if an NFC field close to the nrf52840's antenna
+pub fn wake_on_nfc_sense() {
+    NFCT.tasks_sense().write_value(0x01);
+}