[drivers/serial]add a line feed to the carriage return character when using interrupt tx
* 2017-11-15 JasonJia fix poll rx issue when data is full.
* add TCFLSH and FIONREAD support.
* 2018-12-08 Ernest Chen add DMA choice
+ * 2020-09-14 WillianChan add a line feed to the carriage return character
+ when using interrupt tx
*/
#include <rthw.h>
@@ -315,6 +317,18 @@ rt_inline int _serial_int_tx(struct rt_serial_device *serial, const rt_uint8_t *
while (length)
{
+ /*
+ * to be polite with serial console add a line feed
+ * to the carriage return character
+ */
+ if (*data == '\n' && (serial->parent.open_flag & RT_DEVICE_FLAG_STREAM))
+ {
+ if (serial->ops->putc(serial, '\r') == -1)
+ {
+ rt_completion_wait(&(tx->completion), RT_WAITING_FOREVER);
+ continue;
+ }
+
if (serial->ops->putc(serial, *(char*)data) == -1)
{
rt_completion_wait(&(tx->completion), RT_WAITING_FOREVER);
