From 264608fc161d7486c642fef252849bcbcfa87a47 Mon Sep 17 00:00:00 2001
From: Michael Hayes <michael.hayes@canterbury.ac.nz>
Date: Wed, 25 Sep 2013 22:29:24 +1200
Subject: [PATCH] Gobble echoed character

---
 drivers/avr/ir_uart.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/avr/ir_uart.c b/drivers/avr/ir_uart.c
index dc288c1..361f47f 100644
--- a/drivers/avr/ir_uart.c
+++ b/drivers/avr/ir_uart.c
@@ -49,8 +49,10 @@ ir_uart_putc (char ch)
 {
     usart1_putc (ch);
 
-    /* The character gets echoed on the UCFK4 so we should
-       probably gobble it here.  */
+    /* Gobble echoed character.  The echoing is due to an electrical
+       common-path interference problem caused by a poor PCB layout of the
+       track powering the IR receiver.  */
+    ir_uart_getc ();
 
     return 1;
 }