codal_port/microbit_microphone: Add set_sensitivity method and consts.

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

Author: dpgeorge

src/codal_port/microbit_microphone.c

@@ -81,6 +81,13 @@ STATIC uint8_t sound_event_from_obj(mp_obj_t sound) {
     mp_raise_ValueError(MP_ERROR_TEXT("invalid sound"));
 }
 
+STATIC mp_obj_t microbit_microphone_set_sensitivity(mp_obj_t self_in, mp_obj_t value_in) {
+    (void)self_in;
+    microbit_hal_microphone_set_sensitivity(mp_obj_get_float(value_in));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(microbit_microphone_set_sensitivity_obj, microbit_microphone_set_sensitivity);
+
 STATIC mp_obj_t microbit_microphone_set_threshold(mp_obj_t self_in, mp_obj_t sound_in, mp_obj_t value_in) {
     (void)self_in;
     uint8_t sound = sound_event_from_obj(sound_in);
@@ -228,6 +235,8 @@ static mp_obj_t microbit_microphone_stop_recording(mp_obj_t self_in) {
 static MP_DEFINE_CONST_FUN_OBJ_1(microbit_microphone_stop_recording_obj, microbit_microphone_stop_recording);
 
 STATIC const mp_rom_map_elem_t microbit_microphone_locals_dict_table[] = {
+    // Methods.
+    { MP_ROM_QSTR(MP_QSTR_set_sensitivity), MP_ROM_PTR(&microbit_microphone_set_sensitivity_obj) },
     { MP_ROM_QSTR(MP_QSTR_set_threshold), MP_ROM_PTR(&microbit_microphone_set_threshold_obj) },
     { MP_ROM_QSTR(MP_QSTR_sound_level), MP_ROM_PTR(&microbit_microphone_sound_level_obj) },
     { MP_ROM_QSTR(MP_QSTR_current_event), MP_ROM_PTR(&microbit_microphone_current_event_obj) },
@@ -238,6 +247,11 @@ STATIC const mp_rom_map_elem_t microbit_microphone_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_record_into), MP_ROM_PTR(&microbit_microphone_record_into_obj) },
     { MP_ROM_QSTR(MP_QSTR_is_recording), MP_ROM_PTR(&microbit_microphone_is_recording_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop_recording), MP_ROM_PTR(&microbit_microphone_stop_recording_obj) },
+
+    // Constants.
+    { MP_ROM_QSTR(MP_QSTR_SENSITIVITY_LOW), MP_ROM_INT(0.079) },
+    { MP_ROM_QSTR(MP_QSTR_SENSITIVITY_MEDIUM), MP_ROM_INT(0.2) },
+    { MP_ROM_QSTR(MP_QSTR_SENSITIVITY_HIGH), MP_ROM_INT(1.0) },
 };
 STATIC MP_DEFINE_CONST_DICT(microbit_microphone_locals_dict, microbit_microphone_locals_dict_table);