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1 parent 6b93758 commit c67b2c1Copy full SHA for c67b2c1
shared-bindings/analogio/AnalogIn.c
@@ -138,7 +138,13 @@ const mp_obj_property_t analogio_analogin_value_obj = {
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STATIC mp_obj_t analogio_analogin_obj_get_reference_voltage(mp_obj_t self_in) {
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analogio_analogin_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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- return mp_obj_new_float(common_hal_analogio_analogin_get_reference_voltage(self));
+
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+ float reference_voltage = common_hal_analogio_analogin_get_reference_voltage(self);
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+ if (reference_voltage == 0.0f) {
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+ return mp_const_none;
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+ } else {
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+ return mp_obj_new_float(reference_voltage);
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+ }
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}
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MP_DEFINE_CONST_FUN_OBJ_1(analogio_analogin_get_reference_voltage_obj,
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analogio_analogin_obj_get_reference_voltage);
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