change(mp-ble): Use synchronous interface

Our interrupts are already scheduled via `mp_schedule()`. By switching
to the synchronous interface we avoid yet another `mp_schedule()` call
in the bluetooth module. This also allows the bluetooth module to not
have to use its internal ring buffer.

pycardium/modules/modbluetooth_card10.c

@@ -99,6 +99,8 @@ static void handle_att_event(struct epic_att_event *att_event)
 				uint16_t end_handle =
 					(v[i + 3] << 8) | v[i + 2];
 				mp_obj_bluetooth_uuid_t service_uuid;
+				service_uuid.base.type =
+					&mp_type_bluetooth_uuid;
 				if (entry_size == 6) {
 					memcpy(service_uuid.data, v + i + 4, 2);
 					service_uuid.type =
@@ -142,6 +144,8 @@ static void handle_att_event(struct epic_att_event *att_event)
 				uint16_t value_handle =
 					(v[i + 4] << 8) | v[i + 3];
 				mp_obj_bluetooth_uuid_t characteristic_uuid;
+				characteristic_uuid.base.type =
+					&mp_type_bluetooth_uuid;
 				if (entry_size == 2 + 1 + 2 + 2) {
 					memcpy(characteristic_uuid.data,
 					       v + i + 5,
@@ -189,6 +193,8 @@ static void handle_att_event(struct epic_att_event *att_event)
 				uint16_t descriptor_handle =
 					(v[i + 1] << 8) | v[i];
 				mp_obj_bluetooth_uuid_t descriptor_uuid;
+				descriptor_uuid.base.type =
+					&mp_type_bluetooth_uuid;
 				if (entry_size == 2 + 2) {
 					memcpy(descriptor_uuid.data,
 					       v + i + 2,

pycardium/mpconfigport.h

@@ -56,6 +56,7 @@ int mp_hal_csprng_read_int(void);
 #define MICROPY_PY_BLUETOOTH                (1)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW      (1)
 #define MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE (1)
+#define MICROPY_PY_BLUETOOTH_USE_SYNC_EVENTS     (1)
 
 /* Modules */
 #define MODULE_BHI160_ENABLED               (1)