altos: flush stdout when fifo from arduino serial port is empty

[fw/altos] / src / core / ao.h

diff --git a/src/core/ao.h b/src/core/ao.h
index 494993f12992b8f7b5e71bd190da155bc3068dc6..8c5335c4bd73a86d9e9edb30a848f0cd18caa1e7 100644 (file)
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -943,6 +943,10 @@ ao_serial_init(void);
 #endif
 
 #if HAS_SERIAL_0
+
+extern volatile __xdata struct ao_fifo ao_usart0_rx_fifo;
+extern volatile __xdata struct ao_fifo ao_usart0_tx_fifo;
+
 void
 ao_serial0_rx0_isr(void) ao_arch_interrupt(2);