stm_nvic_set_enable(STM_ISR_USART1_POS);
stm_nvic_set_priority(STM_ISR_USART1_POS, 4);
-#if USE_SERIAL_1_STDIN
+#if USE_SERIAL_1_STDIN && !DELAY_SERIAL_1_STDIN
ao_add_stdio(_ao_serial1_pollchar,
ao_serial1_putchar,
NULL);
stm_nvic_set_enable(STM_ISR_USART2_POS);
stm_nvic_set_priority(STM_ISR_USART2_POS, 4);
-#if USE_SERIAL_2_STDIN
+#if USE_SERIAL_2_STDIN && !DELAY_SERIAL_2_STDIN
ao_add_stdio(_ao_serial2_pollchar,
ao_serial2_putchar,
NULL);
stm_nvic_set_enable(STM_ISR_USART3_POS);
stm_nvic_set_priority(STM_ISR_USART3_POS, 4);
-#if USE_SERIAL_3_STDIN
+#if USE_SERIAL_3_STDIN && !DELAY_SERIAL_3_STDIN
ao_add_stdio(_ao_serial3_pollchar,
ao_serial3_putchar,
NULL);