+# if SERIAL_2_PA2_PA3
+ stm_moder_set(&stm_gpioa, 2, STM_MODER_INPUT);
+ stm_moder_set(&stm_gpioa, 3, STM_MODER_INPUT);
+# elif SERIAL_2_PA9_PA10
+ stm_moder_set(&stm_gpioa, 9, STM_MODER_INPUT);
+ stm_moder_set(&stm_gpioa, 10, STM_MODER_INPUT);
+# elif SERIAL_2_PA14_PA15
+ stm_moder_set(&stm_gpioa, 14, STM_MODER_INPUT);
+ stm_moder_set(&stm_gpioa, 15, STM_MODER_INPUT);
+# elif SERIAL_2_PB6_PB7
+ stm_moder_set(&stm_gpiob, 6, STM_MODER_INPUT);
+ stm_moder_set(&stm_gpiob, 7, STM_MODER_INPUT);
+#endif