void
ao_cmd_init(void);
+#if HAS_CMD_FILTER
+/*
+ * Provided by an external module to filter raw command lines
+ */
+uint8_t
+ao_cmd_filter(void);
+#endif
+
/*
* ao_dma.c
*/
void
ao_serial_putchar(char c) __critical;
+void
+ao_serial_drain(void) __critical;
+
#define AO_SERIAL_SPEED_4800 0
#define AO_SERIAL_SPEED_9600 1
#define AO_SERIAL_SPEED_19200 2