From 0120ba02a5c692ffa38c002e3bb1d637cfadf542 Mon Sep 17 00:00:00 2001
From: "onelife.real" <onelife.real@gmail.com>
Date: Mon, 20 Feb 2012 09:23:52 +0000
Subject: [PATCH] *** EFM32 branch *** Fix a bug in USART driver

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1974 bbd45198-f89e-11dd-88c7-29a3b14d5316
---
 bsp/efm32/drv_usart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bsp/efm32/drv_usart.c b/bsp/efm32/drv_usart.c
index 00751388a2..64c4409b47 100644
--- a/bsp/efm32/drv_usart.c
+++ b/bsp/efm32/drv_usart.c
@@ -523,8 +523,8 @@ static rt_size_t rt_usart_read (
                 {
                     *(ptr++) = usart->usart_device->RXDATA & 0xff;
                 }
+                len--;
             }
-            len--;
         }
 
         read_len = size - len;