From 284744b7b21cdf12f7137b7c1a2d75e941a313af Mon Sep 17 00:00:00 2001
From: Bluebear233 <417350690@qq.com>
Date: Wed, 13 Jun 2018 21:45:03 +0800
Subject: [PATCH] Update serial.c
MIME-Version: 1.0
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rx_fifo->is_full已经满时继续更新rx_fifo->get_index
---
 components/drivers/serial/serial.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index 1de1331344..5365026724 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -421,7 +421,6 @@ static void rt_dma_recv_update_put_index(struct rt_serial_device *serial, rt_siz
             /* force overwrite get index */
             if (rx_fifo->put_index >= rx_fifo->get_index)
             {
-                rx_fifo->get_index = rx_fifo->put_index;
                 rx_fifo->is_full = RT_TRUE;
             }
         }
@@ -437,10 +436,15 @@ static void rt_dma_recv_update_put_index(struct rt_serial_device *serial, rt_siz
                 rx_fifo->put_index %= serial->config.bufsz;
             }
             /* force overwrite get index */
-            rx_fifo->get_index = rx_fifo->put_index;
             rx_fifo->is_full = RT_TRUE;
         }
     }
+    
+    if(rx_fifo->is_full == RT_TRUE) 
+    {
+        rx_fifo->get_index = rx_fifo->put_index; 
+    } 
+    
     if (rx_fifo->get_index >= serial->config.bufsz) rx_fifo->get_index = 0;
 }