#define ao_serial_btm_getchar ao_serial2_getchar
#define ao_serial_btm_putchar ao_serial2_putchar
#define _ao_serial_btm_pollchar _ao_serial2_pollchar
#define ao_serial_btm_getchar ao_serial2_getchar
#define ao_serial_btm_putchar ao_serial2_putchar
#define _ao_serial_btm_pollchar _ao_serial2_pollchar
#define ao_serial_btm_set_speed ao_serial2_set_speed
#define ao_serial_btm_drain ao_serial2_drain
#define ao_serial_btm_rx_fifo (ao_stm_usart2.rx_fifo)
#define ao_serial_btm_set_speed ao_serial2_set_speed
#define ao_serial_btm_drain ao_serial2_drain
#define ao_serial_btm_rx_fifo (ao_stm_usart2.rx_fifo)