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[DeviceDrivers] fix the poll_rx issue in serial when there is no data.

This commit is contained in:
Bernard Xiong 2015-11-10 10:24:35 +08:00
parent dedc22379a
commit 9d46ae69a7
1 changed files with 3 additions and 0 deletions
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3
components/drivers/serial/serial.c
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@ -29,6 +29,7 @@
* 2014-12-31 bernard use open_flag for poll_tx stream mode. * 2014-12-31 bernard use open_flag for poll_tx stream mode.
* 2015-05-19 Quintin fix DMA tx mod tx_dma->activated flag !=RT_FALSE BUG * 2015-05-19 Quintin fix DMA tx mod tx_dma->activated flag !=RT_FALSE BUG
* in open function. * in open function.
* 2015-11-10 bernard fix the poll rx issue when there is no data.
*/ */
#include <rthw.h> #include <rthw.h>
@ -49,6 +50,8 @@ rt_inline int _serial_poll_rx(struct rt_serial_device *serial, rt_uint8_t *data,
while (length) while (length)
{ {
ch = serial->ops->getc(serial); ch = serial->ops->getc(serial);
if (ch == -1) break;
*data = ch; *data = ch;
data ++; length --; data ++; length --;