-#define AO_STM_NVIC_HIGH_PRIORITY 4
-#define AO_STM_NVIC_CLOCK_PRIORITY 6
-#define AO_STM_NVIC_MED_PRIORITY 8
-#define AO_STM_NVIC_LOW_PRIORITY 10
-
-void ao_lcd_stm_init(void);
-
-void ao_lcd_font_init(void);
-
-void ao_lcd_font_string(char *s);
-
-char
-ao_serial1_getchar(void);
-
-void
-ao_serial1_putchar(char c);
-
-char
-ao_serial1_pollchar(void);