6 files changed, 144 insertions, 13 deletions
diff --git a/shared-bindings/microcontroller/Processor.c b/shared-bindings/microcontroller/Processor.c
index 8c703891d..b0ab842f4 100644
--- a/shared-bindings/microcontroller/Processor.c
+++ b/shared-bindings/microcontroller/Processor.c
@@ -67,6 +67,23 @@ const mp_obj_property_t mcu_processor_frequency_obj = {
     },
 };
 
+//| reset_reason: `microcontroller.ResetReason`
+//| """The reason the microcontroller started up from reset state."""
+//|
+STATIC mp_obj_t mcu_processor_get_reset_reason(mp_obj_t self) {
+    return cp_enum_find(&mcu_reset_reason_type, common_hal_mcu_processor_get_reset_reason());
+}
+
+MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_reset_reason_obj, mcu_processor_get_reset_reason);
+
+const mp_obj_property_t mcu_reset_reason_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&mcu_processor_get_reason_reason_obj,  // getter
+              (mp_obj_t)&mp_const_none_obj,            // no setter
+              (mp_obj_t)&mp_const_none_obj,            // no deleter
+    },
+};
+
 //|     temperature: Optional[float]
 //|     """The on-chip temperature, in Celsius, as a float. (read-only)
 //|
@@ -128,6 +145,7 @@ const mp_obj_property_t mcu_processor_voltage_obj = {
 
 STATIC const mp_rom_map_elem_t mcu_processor_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&mcu_processor_frequency_obj) },
+    { MP_ROM_QSTR(MP_QSTR_reset_reason), MP_ROM_PTR(&mcu_processor_reset_reason_obj) },
     { MP_ROM_QSTR(MP_QSTR_temperature), MP_ROM_PTR(&mcu_processor_temperature_obj) },
     { MP_ROM_QSTR(MP_QSTR_uid), MP_ROM_PTR(&mcu_processor_uid_obj) },
     { MP_ROM_QSTR(MP_QSTR_voltage), MP_ROM_PTR(&mcu_processor_voltage_obj) },
diff --git a/shared-bindings/microcontroller/Processor.h b/shared-bindings/microcontroller/Processor.h
index 0f520f940..a842e06f3 100644
--- a/shared-bindings/microcontroller/Processor.h
+++ b/shared-bindings/microcontroller/Processor.h
@@ -29,11 +29,12 @@
 
 #include "py/obj.h"
 
-#include "common-hal/microcontroller/Processor.h"
+#include "shared-bindings/microcontroller/ResetReason.h"
 
 extern const mp_obj_type_t mcu_processor_type;
 
 uint32_t common_hal_mcu_processor_get_frequency(void);
+mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void);
 float common_hal_mcu_processor_get_temperature(void);
 void common_hal_mcu_processor_get_uid(uint8_t raw_id[]);
 float common_hal_mcu_processor_get_voltage(void);
diff --git a/shared-bindings/microcontroller/ResetReason.c b/shared-bindings/microcontroller/ResetReason.c
new file mode 100644
index 000000000..151fcf315
--- /dev/null
+++ b/shared-bindings/microcontroller/ResetReason.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "py/enum.h"
+
+#include "shared-bindings/microcontroller/ResetReason.h"
+
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, POWER_ON, RESET_REASON_POWER_ON);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, BROWNOUT, RESET_REASON_BROWNOUT);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, SOFTWARE, RESET_REASON_SOFTWARE);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, DEEP_SLEEP_ALARM, RESET_REASON_DEEP_SLEEP_ALARM);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, RESET_PIN, RESET_REASON_RESET_PIN);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, WATCHDOG, RESET_REASON_WATCHDOG);
+
+//| class ResetReason:
+//|     """The reason the microntroller was last reset"""
+//|
+//|     POWER_ON: object
+//|     """The microntroller was started from power off."""
+//|
+//|     BROWNOUT: object
+//|     """The microntroller was reset due to too low a voltage."""
+//|
+//|     SOFTWARE: object
+//|     """The microntroller was reset from software."""
+//|
+//|     DEEP_SLEEP_ALARM: object
+//|     """The microntroller was reset for deep sleep and restarted by an alarm."""
+//|
+//|     RESET_PIN: object
+//|     """The microntroller was reset by a signal on its reset pin. The pin might be connected to a reset button."""
+//|
+//|     WATCHDOG: object
+//|     """The chip microcontroller reset by its watchdog timer."""
+//|
+MAKE_ENUM_MAP(mcu_reset_reason) {
+    MAKE_ENUM_MAP_ENTRY(reset_reason, POWER_ON),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, BROWNOUT),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, SOFTWARE),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, DEEP_SLEEP_ALARM),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, RESET_PIN),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, WATCHDOG),
+};
+STATIC MP_DEFINE_CONST_DICT(mcu_reset_reason_locals_dict, mcu_reset_reason_locals_table);
+
+MAKE_PRINTER(alarm, mcu_reset_reason);
+
+MAKE_ENUM_TYPE(alarm, ResetReason, mcu_reset_reason);
diff --git a/shared-bindings/microcontroller/ResetReason.h b/shared-bindings/microcontroller/ResetReason.h
new file mode 100644
index 000000000..df1abf266
--- /dev/null
+++ b/shared-bindings/microcontroller/ResetReason.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MCU__RESET_REASON__H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_MCU__RESET_REASON__H
+
+#include "py/obj.h"
+#include "py/enum.h"
+
+typedef enum {
+    RESET_REASON_POWER_ON,
+    RESET_REASON_BROWNOUT,
+    RESET_REASON_SOFTWARE,
+    RESET_REASON_DEEP_SLEEP_ALARM,
+    RESET_REASON_RESET_PIN,
+    RESET_REASON_WATCHDOG,
+} mcu_reset_reason_t;
+
+extern const cp_enum_obj_t reset_reason_POWER_ON_obj;
+extern const cp_enum_obj_t reset_reason_BROWNOUT_obj;
+extern const cp_enum_obj_t reset_reason_SOFTWARE_obj;
+extern const cp_enum_obj_t reset_reason_DEEP_SLEEP_ALARM_obj;
+extern const cp_enum_obj_t reset_reason_RESET_PIN_obj;
+extern const cp_enum_obj_t reset_reason_WATCHDOG_obj;
+
+extern const mp_obj_type_t mcu_reset_reason_type;
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_MCU__RESET_REASON__H
diff --git a/shared-bindings/microcontroller/__init__.c b/shared-bindings/microcontroller/__init__.c
index bfeb812d6..d09cf8f44 100644
--- a/shared-bindings/microcontroller/__init__.c
+++ b/shared-bindings/microcontroller/__init__.c
@@ -135,13 +135,6 @@ STATIC mp_obj_t mcu_reset(void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_reset_obj, mcu_reset);
 
-STATIC mp_obj_t mcu_sleep(void) {
-    common_hal_mcu_deep_sleep();
-    // We won't actually get here because mcu is going into sleep.
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_sleep_obj, mcu_sleep);
-
 //| nvm: Optional[ByteArray]
 //| """Available non-volatile memory.
 //| This object is the sole instance of `nvm.ByteArray` when available or ``None`` otherwise.
@@ -176,8 +169,6 @@ STATIC const mp_rom_map_elem_t mcu_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_enable_interrupts), MP_ROM_PTR(&mcu_enable_interrupts_obj) },
     { 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) },
-    //ToDo: Remove MP_QSTR_sleep when sleep on code.py exit implemented.
-    { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&mcu_sleep_obj) },
     #if CIRCUITPY_INTERNAL_NVM_SIZE > 0
     { MP_ROM_QSTR(MP_QSTR_nvm),  MP_ROM_PTR(&common_hal_mcu_nvm_obj) },
     #else
diff --git a/shared-bindings/microcontroller/__init__.h b/shared-bindings/microcontroller/__init__.h
index f5bcfaa08..ac71de424 100644
--- a/shared-bindings/microcontroller/__init__.h
+++ b/shared-bindings/microcontroller/__init__.h
@@ -32,7 +32,7 @@
 #include "py/mpconfig.h"
 
 #include "common-hal/microcontroller/Processor.h"
-
+#include "shared-bindings/microcontroller/ResetReason.h"
 #include "shared-bindings/microcontroller/RunMode.h"
 
 extern void common_hal_mcu_delay_us(uint32_t);
@@ -43,8 +43,6 @@ extern void common_hal_mcu_enable_interrupts(void);
 extern void common_hal_mcu_on_next_reset(mcu_runmode_t runmode);
 extern void common_hal_mcu_reset(void);
 
-extern void common_hal_mcu_deep_sleep(void);
-
 extern const mp_obj_dict_t mcu_pin_globals;
 
 extern const mcu_processor_obj_t common_hal_mcu_processor_obj;