* these functions must be implemented for a concrete hardware
*/
+const char *hal_get_version_string(void);
+const char *hal_get_buildno_string(void);
+const char *hal_get_radio_version_string(void);
+
void hal_lcd_set_pixel(uint8_t x, uint8_t y, uint8_t color);
void hal_lcd_clear_display(void);
void hal_lcd_update_display(void);