return chip vcc value

1 files changed, 22 insertions, 0 deletions

diff --git a/shared-bindings/microcontroller/Processor.c b/shared-bindings/microcontroller/Processor.c
index be685b0a8..023f063e0 100644
--- a/shared-bindings/microcontroller/Processor.c
+++ b/shared-bindings/microcontroller/Processor.c
@@ -113,10 +113,32 @@ const mp_obj_property_t mcu_processor_uid_obj = {
     },
 };
 
+//|     .. attribute:: voltage
+//|
+//|       The input voltage to the microcontroller, as a float. (read-only)
+//|
+//|       Is `None` if the voltage is not available.
+//|
+STATIC mp_obj_t mcu_processor_get_voltage(mp_obj_t self) {
+    float voltage = common_hal_mcu_processor_get_voltage();
+    return isnan(voltage) ? mp_const_none : mp_obj_new_float(voltage);
+}
+
+MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_voltage_obj, mcu_processor_get_voltage);
+
+const mp_obj_property_t mcu_processor_voltage_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&mcu_processor_get_voltage_obj,  // getter
+              (mp_obj_t)&mp_const_none_obj,            // no setter
+              (mp_obj_t)&mp_const_none_obj,            // no deleter
+    },
+};
+
 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_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) },
 };
 
 STATIC MP_DEFINE_CONST_DICT(mcu_processor_locals_dict, mcu_processor_locals_dict_table);