codal_app/microbithal: Make microbit_hal_power_deep_sleep return bool.

Signed-off-by: Damien George <damien@micropython.org>

Author: dpgeorge

src/codal_app/microbithal.cpp

@@ -127,11 +127,12 @@ void microbit_hal_power_off(void) {
     uBit.power.off();
 }
 
-void microbit_hal_power_deep_sleep(bool wake_on_ms, uint32_t ms) {
+bool microbit_hal_power_deep_sleep(bool wake_on_ms, uint32_t ms) {
     if (wake_on_ms) {
-        uBit.power.deepSleep(ms, true);
+        return uBit.power.deepSleep(ms, true);
     } else {
         uBit.power.deepSleep();
+        return true; // Sleep was interrupted by a wake event.
     }
 }
 

src/codal_app/microbithal.h

@@ -112,7 +112,7 @@ void microbit_hal_power_clear_wake_sources(void);
 void microbit_hal_power_wake_on_button(int button, bool wake_on_active);
 void microbit_hal_power_wake_on_pin(int pin, bool wake_on_active);
 void microbit_hal_power_off(void);
-void microbit_hal_power_deep_sleep(bool wake_on_ms, uint32_t ms);
+bool microbit_hal_power_deep_sleep(bool wake_on_ms, uint32_t ms);
 
 void microbit_hal_pin_set_pull(int pin, int pull);
 int microbit_hal_pin_get_pull(int pin);