serial.c: make sure to read incoming characters even if we don't

have space to store them.
2010-10-04 15:51:55 +02:00 · 2010-10-04 15:51:55 +02:00 · fb53c2c0a8
parent f56e121473
commit fb53c2c0a8
1 changed files with 6 additions and 0 deletions
--- a/serial.c
+++ b/serial.c
@ -82,6 +82,12 @@ ISR(USART0_RX_vect)
 {
 	if (buf_canwrite(rx))
 		buf_push(rx, UDR0);
+	else {
+		uint8_t trash;
+
+		// not reading the character makes the interrupt logic to swamp us with retries, so better read it and throw it away
+		trash = UDR0;
+	}
 }

 #ifdef	USART_UDRE_vect