diff --git a/extmod/moduselect.c b/extmod/moduselect.c
index 14f9ffb661..a1513835b2 100644
--- a/extmod/moduselect.c
+++ b/extmod/moduselect.c
@@ -171,7 +171,8 @@ STATIC mp_obj_t select_select(size_t n_args, const mp_obj_t *args) {
             mp_map_deinit(&poll_map);
             return mp_obj_new_tuple(3, list_array);
         }
-        MICROPY_EVENT_POLL_HOOK
+        // CIRCUITPY
+        RUN_BACKGROUND_TASKS;
     }
 }
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_select_select_obj, 3, 4, select_select);
@@ -250,7 +251,11 @@ STATIC mp_uint_t poll_poll_internal(uint n_args, const mp_obj_t *args) {
         if (n_ready > 0 || (timeout != (mp_uint_t)-1 && mp_hal_ticks_ms() - start_tick >= timeout)) {
             break;
         }
-        MICROPY_EVENT_POLL_HOOK
+        // CIRCUITPY
+        RUN_BACKGROUND_TASKS;
+        if (mp_hal_is_interrupted()) {
+            return 0;
+        }
     }
 
     return n_ready;
diff --git a/ports/atmel-samd/common-hal/i2ctarget/I2CTarget.h b/ports/atmel-samd/common-hal/i2ctarget/I2CTarget.h
index 471abbb0bf..894961ab7b 100644
--- a/ports/atmel-samd/common-hal/i2ctarget/I2CTarget.h
+++ b/ports/atmel-samd/common-hal/i2ctarget/I2CTarget.h
@@ -23,8 +23,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#ifndef MICROPY_INCLUDED_SAMD_PENDSV_H
-#define MICROPY_INCLUDED_SAMD_PENDSV_H
 
 #ifndef MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_TARGET_H
 #define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_TARGET_H
diff --git a/py/obj.h b/py/obj.h
index 2576f87cf1..789e05b884 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -898,6 +898,10 @@ extern const mp_obj_type_t mp_type_UnicodeError;
 extern const mp_obj_type_t mp_type_ValueError;
 extern const mp_obj_type_t mp_type_ViperTypeError;
 extern const mp_obj_type_t mp_type_ZeroDivisionError;
+#if CIRCUITPY_ALARM
+extern const mp_obj_type_t mp_type_DeepSleepRequest;
+#endif
+
 
 // Constant objects, globally accessible: None, False, True
 // These should always be accessed via the below macros.
diff --git a/shared-bindings/_bleio/CharacteristicBuffer.c b/shared-bindings/_bleio/CharacteristicBuffer.c
index d95972d263..474a07f7b9 100644
--- a/shared-bindings/_bleio/CharacteristicBuffer.c
+++ b/shared-bindings/_bleio/CharacteristicBuffer.c
@@ -228,6 +228,6 @@ MP_DEFINE_CONST_OBJ_TYPE(
     MP_TYPE_FLAG_ITER_IS_ITERNEXT,
     make_new, bleio_characteristic_buffer_make_new,
     locals_dict, &bleio_characteristic_buffer_locals_dict,
-    iternext, mp_stream_unbuffered_iter,
+    iter, mp_stream_unbuffered_iter,
     protocol, &characteristic_buffer_stream_p
     );
diff --git a/shared-bindings/_bleio/ScanResults.c b/shared-bindings/_bleio/ScanResults.c
index 028c066168..81d4e66bce 100644
--- a/shared-bindings/_bleio/ScanResults.c
+++ b/shared-bindings/_bleio/ScanResults.c
@@ -63,6 +63,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     bleio_scanresults_type,
     MP_QSTR_ScanResults,
     MP_TYPE_FLAG_ITER_IS_ITERNEXT,
-    getiter, mp_identity_getiter,
-    iternext, scanresults_iternext
+    iter, scanresults_iternext
     );
diff --git a/shared-bindings/_bleio/UUID.c b/shared-bindings/_bleio/UUID.c
index 3469982458..c177e096f5 100644
--- a/shared-bindings/_bleio/UUID.c
+++ b/shared-bindings/_bleio/UUID.c
@@ -288,5 +288,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     make_new, bleio_uuid_make_new,
     locals_dict, &bleio_uuid_locals_dict,
     unary_op, bleio_uuid_unary_op,
-    binary_op, bleio_uuid_binary_op,
+    binary_op, bleio_uuid_binary_op
     );
diff --git a/shared-bindings/_bleio/__init__.h b/shared-bindings/_bleio/__init__.h
index f34df306b7..1a917793eb 100644
--- a/shared-bindings/_bleio/__init__.h
+++ b/shared-bindings/_bleio/__init__.h
@@ -29,6 +29,7 @@
 #ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BLEIO___INIT___H
 #define MICROPY_INCLUDED_SHARED_BINDINGS_BLEIO___INIT___H
 
+#include "py/obj.h"
 #include "py/objlist.h"
 
 #include "shared-bindings/_bleio/Adapter.h"
@@ -41,14 +42,12 @@ extern bleio_adapter_obj_t common_hal_bleio_adapter_obj;
 void bleio_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind);
 
 #define MP_DEFINE_BLEIO_EXCEPTION(exc_name, base_name) \
-    const mp_obj_type_t mp_type_bleio_##exc_name = { \
-        { &mp_type_type }, \
-        .name = MP_QSTR_##exc_name, \
-        .print = bleio_exception_print, \
-        .make_new = mp_obj_exception_make_new, \
-        .attr = mp_obj_exception_attr, \
-        .parent = &mp_type_##base_name, \
-    };
+    MP_DEFINE_CONST_OBJ_TYPE(mp_type_bleio_##exc_name, MP_QSTR_##exc_name, MP_TYPE_FLAG_NONE, \
+    make_new, mp_obj_exception_make_new, \
+    print, bleio_exception_print, \
+    attr, mp_obj_exception_attr, \
+    parent, &mp_type_##base_name \
+    );
 
 extern const mp_obj_type_t mp_type_bleio_BluetoothError;
 extern const mp_obj_type_t mp_type_bleio_RoleError;
diff --git a/shared-bindings/_pixelmap/PixelMap.c b/shared-bindings/_pixelmap/PixelMap.c
index 618135f995..4d06fe64fa 100644
--- a/shared-bindings/_pixelmap/PixelMap.c
+++ b/shared-bindings/_pixelmap/PixelMap.c
@@ -259,8 +259,8 @@ MP_DEFINE_CONST_OBJ_TYPE(
     pixelmap_pixelmap_type,
     MP_QSTR_PixelMap,
     MP_TYPE_FLAG_NONE,
-    .locals_dict, &pixelmap_pixelmap_locals_dict,
-    .make_new, pixelmap_pixelmap_make_new,
-    .subscr, pixelmap_pixelmap_subscr,
-    .unary_op, pixelmap_pixelmap_unary_op
+    locals_dict, &pixelmap_pixelmap_locals_dict,
+    make_new, pixelmap_pixelmap_make_new,
+    subscr, pixelmap_pixelmap_subscr,
+    unary_op, pixelmap_pixelmap_unary_op
     );
diff --git a/shared-bindings/adafruit_bus_device/i2c_device/I2CDevice.c b/shared-bindings/adafruit_bus_device/i2c_device/I2CDevice.c
index c0380871fa..0da8c48fcf 100644
--- a/shared-bindings/adafruit_bus_device/i2c_device/I2CDevice.c
+++ b/shared-bindings/adafruit_bus_device/i2c_device/I2CDevice.c
@@ -289,5 +289,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     MP_QSTR_I2CDevice,
     MP_TYPE_FLAG_NONE,
     make_new, adafruit_bus_device_i2cdevice_make_new,
-    locals_dict = &adafruit_bus_device_i2cdevice_locals_dict
+    locals_dict, &adafruit_bus_device_i2cdevice_locals_dict
     );
diff --git a/shared-bindings/audiomp3/MP3Decoder.c b/shared-bindings/audiomp3/MP3Decoder.c
index 160b415ad1..1acab44a61 100644
--- a/shared-bindings/audiomp3/MP3Decoder.c
+++ b/shared-bindings/audiomp3/MP3Decoder.c
@@ -289,5 +289,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     MP_TYPE_FLAG_NONE,
     make_new, audiomp3_mp3file_make_new,
     locals_dict, &audiomp3_mp3file_locals_dict,
-    .protocol, &audiomp3_mp3file_proto
+    protocol, &audiomp3_mp3file_proto
     );
diff --git a/shared-bindings/i2ctarget/I2CTarget.c b/shared-bindings/i2ctarget/I2CTarget.c
index c7866813ea..79d234c5dc 100644
--- a/shared-bindings/i2ctarget/I2CTarget.c
+++ b/shared-bindings/i2ctarget/I2CTarget.c
@@ -214,12 +214,13 @@ STATIC const mp_rom_map_elem_t i2ctarget_i2c_target_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(i2ctarget_i2c_target_locals_dict, i2ctarget_i2c_target_locals_dict_table);
 
-const mp_obj_type_t i2ctarget_i2c_target_type = {
-    { &mp_type_type },
-    .name = MP_QSTR_I2CTarget,
-    .make_new = i2ctarget_i2c_target_make_new,
-    .locals_dict = (mp_obj_dict_t *)&i2ctarget_i2c_target_locals_dict,
-};
+MP_DEFINE_CONST_OBJ_TYPE(
+    i2ctarget_i2c_target_type,
+    MP_QSTR_I2CTarget,
+    MP_TYPE_FLAG_NONE,
+    make_new, i2ctarget_i2c_target_make_new,
+    locals_dict, &i2ctarget_i2c_target_locals_dict
+    );
 
 //| class I2CTargetRequest:
 //|     def __init__(
diff --git a/shared-bindings/keypad/EventQueue.c b/shared-bindings/keypad/EventQueue.c
index 596c141b41..9293f8390b 100644
--- a/shared-bindings/keypad/EventQueue.c
+++ b/shared-bindings/keypad/EventQueue.c
@@ -167,7 +167,7 @@ STATIC const mp_stream_p_t eventqueue_p = {
 
 MP_DEFINE_CONST_OBJ_TYPE(
     keypad_eventqueue_type,
-    P_QSTR_EventQueue,
+    MP_QSTR_EventQueue,
     MP_TYPE_FLAG_NONE,
     unary_op, keypad_eventqueue_unary_op,
     #if MICROPY_PY_USELECT
diff --git a/shared-bindings/keypad/Keys.c b/shared-bindings/keypad/Keys.c
index 6b9f394a08..94fe3dba02 100644
--- a/shared-bindings/keypad/Keys.c
+++ b/shared-bindings/keypad/Keys.c
@@ -173,7 +173,7 @@ MP_DEFINE_CONST_OBJ_TYPE(
     keypad_keys_type,
     MP_QSTR_Keys,
     MP_TYPE_FLAG_NONE,
-    .make_new = keypad_keys_make_new
+    make_new, keypad_keys_make_new
     #if CIRCUITPY_KEYPAD_KEYS
     , locals_dict, &keypad_keys_locals_dict
     #endif
diff --git a/shared-bindings/rgbmatrix/RGBMatrix.c b/shared-bindings/rgbmatrix/RGBMatrix.c
index 6ea601f1e0..d9277ad443 100644
--- a/shared-bindings/rgbmatrix/RGBMatrix.c
+++ b/shared-bindings/rgbmatrix/RGBMatrix.c
@@ -428,5 +428,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     locals_dict, &rgbmatrix_rgbmatrix_locals_dict,
     make_new, rgbmatrix_rgbmatrix_make_new,
     buffer, rgbmatrix_rgbmatrix_get_buffer,
-    protocol = &rgbmatrix_rgbmatrix_proto
+    protocol, &rgbmatrix_rgbmatrix_proto
     );
diff --git a/shared-bindings/vectorio/VectorShape.c b/shared-bindings/vectorio/VectorShape.c
index fb91f487b3..bf2a1d772d 100644
--- a/shared-bindings/vectorio/VectorShape.c
+++ b/shared-bindings/vectorio/VectorShape.c
@@ -245,5 +245,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     vectorio_vector_shape_type,
     MP_QSTR_VectorShape,
     MP_TYPE_FLAG_NONE,
-    locals_dict = &vectorio_vector_shape_locals_dict
+    locals_dict, &vectorio_vector_shape_locals_dict
     );
diff --git a/shared-module/getpass/__init__.c b/shared-module/getpass/__init__.c
index 8f16d75b53..72469a686f 100644
--- a/shared-module/getpass/__init__.c
+++ b/shared-module/getpass/__init__.c
@@ -57,5 +57,5 @@ mp_obj_t shared_module_getpass_getpass(const char *prompt, mp_print_t *print) {
         }
     }
 
-    return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
+    return mp_obj_new_str_from_vstr(&vstr);
 }
diff --git a/shared-module/msgpack/__init__.c b/shared-module/msgpack/__init__.c
index 6425ae8496..aac38607cb 100644
--- a/shared-module/msgpack/__init__.c
+++ b/shared-module/msgpack/__init__.c
@@ -375,7 +375,7 @@ STATIC mp_obj_t unpack_bytes(msgpack_stream_t *s, size_t size) {
         size -= n;
         p += n;
     }
-    return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
+    return mp_obj_new_bytes_from_vstr(&vstr);
 }
 
 STATIC mp_obj_t unpack_ext(msgpack_stream_t *s, size_t size, mp_obj_t ext_hook) {
@@ -474,7 +474,7 @@ STATIC mp_obj_t unpack(msgpack_stream_t *s, mp_obj_t ext_hook, bool use_list) {
             vstr_init_len(&vstr, size);
             byte *p = (byte *)vstr.buf;
             read(s, p, size);
-            return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
+            return mp_obj_new_str_from_vstr(&vstr);
         }
         case 0xde:
         case 0xdf: {