Expand Up @@ -21,9 +21,9 @@ static void mcu_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value) /*TODO:set gpio out put mode */ } static rt_int8_t mcu_pin_read(rt_device_t dev, rt_base_t pin) static rt_ssize_t mcu_pin_read(rt_device_t dev, rt_base_t...