};
extern struct ao_stdio ao_stdios[];
-extern int8_t ao_cur_stdio;
-extern int8_t ao_num_stdios;
+extern uint8_t ao_cur_stdio;
+extern uint8_t ao_num_stdios;
void
flush(void);
uint8_t
ao_echo(void);
-int8_t
+uint8_t
ao_add_stdio(int (*pollchar)(void),
void (*putchar)(char) ,
void (*flush)(void));
* ao_freq.c
*/
-int32_t ao_freq_to_set(int32_t freq, int32_t cal);
+uint32_t ao_freq_to_set(uint32_t freq, uint32_t cal);
/*
* ao_ms5607.c