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fix rt_serial_read bug when there is no data in the buffer. -- found by freescale@stmsky.com 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@129 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2009-10-24 23:07:55 +00:00
parent 17c81cfa21
commit a7c36ff98c
1 changed files with 3 additions and 0 deletions
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3
libcpu/arm/stm32/serial.c
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@ -10,6 +10,8 @@
* Change Logs:
* Date Author Notes
* 2009-02-05 Bernard first version
* 2009-10-25 Bernard fix rt_serial_read bug when there is no data
* in the buffer.
*/
#include "serial.h"
@ -198,6 +200,7 @@ static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt
{
/* set error code */
err_code = -RT_EEMPTY;
break;
}
else
{