#ifndef ao_serial_btm_getchar
#define ao_serial_btm_putchar ao_serial1_putchar
#define _ao_serial_btm_pollchar _ao_serial1_pollchar
#ifndef ao_serial_btm_getchar
#define ao_serial_btm_putchar ao_serial1_putchar
#define _ao_serial_btm_pollchar _ao_serial1_pollchar