Add function to get time elapsed during sleep

ports/esp32s2/common-hal/microcontroller/__init__.c

@@ -25,6 +25,8 @@
  * THE SOFTWARE.
  */
 
+#include <sys/time.h>
+
 #include "py/mphal.h"
 #include "py/obj.h"
 #include "py/runtime.h"
@@ -42,6 +44,9 @@
 #include "freertos/FreeRTOS.h"
 
 #include "esp_sleep.h"
+#include "soc/rtc_periph.h"
+
+static RTC_DATA_ATTR struct timeval sleep_enter_time;
 
 void common_hal_mcu_delay_us(uint32_t delay) {
 
@@ -80,9 +85,50 @@ void common_hal_mcu_reset(void) {
 }
 
 void common_hal_mcu_sleep(void) {
+    gettimeofday(&sleep_enter_time, NULL);
     esp_deep_sleep_start(); 
 }
 
+int common_hal_mcu_get_sleep_time(void) {
+    struct timeval now;
+    gettimeofday(&now, NULL);
+    return (now.tv_sec - sleep_enter_time.tv_sec) * 1000 + (now.tv_usec - sleep_enter_time.tv_usec) / 1000;
+}
+
+mp_obj_t common_hal_mcu_get_wake_alarm(void) {
+    switch (esp_sleep_get_wakeup_cause()) {
+        case ESP_SLEEP_WAKEUP_TIMER: ;
+            //Wake up from timer.
+            time_alarm_obj_t *timer = m_new_obj(time_alarm_obj_t);
+            timer->base.type = &time_alarm_type;           
+            return timer;
+        case ESP_SLEEP_WAKEUP_EXT0: ;
+            //Wake up from GPIO
+            io_alarm_obj_t *ext0 = m_new_obj(io_alarm_obj_t);
+            ext0->base.type = &io_alarm_type;  
+            return ext0;
+        case ESP_SLEEP_WAKEUP_EXT1: 
+            //Wake up from GPIO, returns -> esp_sleep_get_ext1_wakeup_status()  
+            /*uint64_t wakeup_pin_mask = esp_sleep_get_ext1_wakeup_status();
+            if (wakeup_pin_mask != 0) {
+                int pin = __builtin_ffsll(wakeup_pin_mask) - 1;
+                printf("Wake up from GPIO %d\n", pin);
+            } else {
+                printf("Wake up from GPIO\n");
+            }*/
+            break;       
+        case ESP_SLEEP_WAKEUP_TOUCHPAD: 
+            //TODO: implement TouchIO
+            //Wake up from touch on pad, returns -> esp_sleep_get_touchpad_wakeup_status()
+            break;        
+        case ESP_SLEEP_WAKEUP_UNDEFINED:
+        default:
+            //Not a deep sleep reset
+            break;
+    }
+    return mp_const_none;
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {

shared-bindings/microcontroller/__init__.c

@@ -152,6 +152,24 @@ STATIC mp_obj_t mcu_sleep(void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_sleep_obj, mcu_sleep);
 
+//| def getWakeAlarm() -> None:
+//|     """This returns the alarm that triggered wakeup, 
+//|     also returns alarm specific parameters`.
+//|
+STATIC mp_obj_t mcu_get_wake_alarm(void) {
+    return common_hal_mcu_get_wake_alarm();
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_get_wake_alarm_obj, mcu_get_wake_alarm);
+
+//| def getSleepTime() -> None:
+//|     """This returns the period of time in ms, 
+//|     in which the board was in deep sleep`.
+//|
+STATIC mp_obj_t mcu_get_sleep_time(void) {
+    return mp_obj_new_int(common_hal_mcu_get_sleep_time());
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_get_sleep_time_obj, mcu_get_sleep_time);
+
 //| nvm: Optional[ByteArray]
 //| """Available non-volatile memory.
 //| This object is the sole instance of `nvm.ByteArray` when available or ``None`` otherwise.
@@ -188,6 +206,8 @@ STATIC const mp_rom_map_elem_t mcu_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_on_next_reset), MP_ROM_PTR(&mcu_on_next_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&mcu_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&mcu_sleep_obj) },
+    { MP_ROM_QSTR(MP_QSTR_getSleepTime), MP_ROM_PTR(&mcu_get_sleep_time_obj) },
+    { MP_ROM_QSTR(MP_QSTR_getWakeAlarm), MP_ROM_PTR(&mcu_get_wake_alarm_obj) },
     #if CIRCUITPY_INTERNAL_NVM_SIZE > 0
     { MP_ROM_QSTR(MP_QSTR_nvm),  MP_ROM_PTR(&common_hal_mcu_nvm_obj) },
     #else

shared-bindings/microcontroller/__init__.h

@@ -35,6 +35,9 @@
 
 #include "shared-bindings/microcontroller/RunMode.h"
 
+#include "shared-bindings/io_alarm/__init__.h"
+#include "shared-bindings/time_alarm/__init__.h"
+
 extern void common_hal_mcu_delay_us(uint32_t);
 
 extern void common_hal_mcu_disable_interrupts(void);
@@ -44,6 +47,8 @@ extern void common_hal_mcu_on_next_reset(mcu_runmode_t runmode);
 extern void common_hal_mcu_reset(void);
 
 extern void common_hal_mcu_sleep(void);
+extern int common_hal_mcu_get_sleep_time(void);
+extern mp_obj_t common_hal_mcu_get_wake_alarm(void);
 
 extern const mp_obj_dict_t mcu_pin_globals;