#define AO_PANIC_FLASH 9 /* Invalid flash part (or wrong blocksize) */
#define AO_PANIC_USB 10 /* Trying to send USB packet while busy */
#define AO_PANIC_BT 11 /* Communications with bluetooth device failed */
+#define AO_PANIC_STACK 12 /* Stack overflow */
/* Stop the operating system, beeping and blinking the reason */
void
#error Please define HAS_SERIAL_1
#endif
-#if HAS_SERIAL_1
+#if HAS_SERIAL_1 | HAS_SERIAL_2 | HAS_SERIAL_3
#ifndef USE_SERIAL_STDIN
#error Please define USE_SERIAL_STDIN
#endif