From 770bf192d53c275142fe991fce97d5c1c9ec6ffd Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 10 Feb 2013 00:46:27 +0000
Subject: [PATCH] Fix a readline bug.  If a NUL is received, it would return
 end-of-file

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5633 42af7a65-404d-4744-a932-0658087f49c3
---
 arch/arm/src/stm32/stm32_serial.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index 18e65f1d9a..327e515b5f 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -981,6 +981,8 @@ static void up_setspeed(struct uart_dev_s *dev)
      }
    else
      {
+       DEBUGASSERT(usartdiv8 >= 8);
+
        /* Perform mysterious operations on bits 0-3 */
 
        brr  = ((usartdiv8 & 0xfff0) | ((usartdiv8 & 0x000f) >> 1));