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[BSP]changed stm32f10x uart driver. make sure the serial transmit 

complete in putc().
This commit is contained in:
armink 2015-01-31 11:18:59 +08:00
parent 131c41d182
commit 79c37cb30f
1 changed files with 2 additions and 1 deletions
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3
bsp/stm32f10x/drivers/usart.c
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@ -12,6 +12,7 @@
* 2009-01-05 Bernard the first version
* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
* 2013-05-13 aozima update for kehong-lingtai.
* 2015-01-31 armink make sure the serial transmit complete in putc()
*/
#include "stm32f10x.h"
@ -118,8 +119,8 @@ static int stm32_putc(struct rt_serial_device *serial, char c)
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
while (!(uart->uart_device->SR & USART_FLAG_TXE));
uart->uart_device->DR = c;
while (!(uart->uart_device->SR & USART_FLAG_TC));
return 1;
}