Add SerialPortPoll Api in SerialPortLib to Poll the serial device to see if there is any data waiting.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5624 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 36 insertions, 0 deletions

diff --git a/MdePkg/Include/Library/SerialPortLib.h b/MdePkg/Include/Library/SerialPortLib.h
index dc4031a974..59c5c27e3f 100644
--- a/MdePkg/Include/Library/SerialPortLib.h
+++ b/MdePkg/Include/Library/SerialPortLib.h
@@ -70,5 +70,21 @@ SerialPortRead (
   IN  UINTN 	NumberOfBytes

   );

 

+/**

+  Poll the serial device to see if there is any data waiting.

+

+  If there is data waiting to be read from the serial port, then return

+  TRUE.  If there is no data waiting to be read from the serial port, then 

+  return FALSE.

+

+  @retval TRUE             Data is waiting to be read.

+  @retval FALSE            There is no data waiting to be read.

+

+**/

+BOOLEAN

+EFIAPI

+SerialPortPoll (

+  VOID

+  );

 

 #endif

diff --git a/MdePkg/Library/SerialPortLibNull/SerialPortLibNull.c b/MdePkg/Library/SerialPortLibNull/SerialPortLibNull.c
index 1fdc6586a5..fa256facc7 100644
--- a/MdePkg/Library/SerialPortLibNull/SerialPortLibNull.c
+++ b/MdePkg/Library/SerialPortLibNull/SerialPortLibNull.c
@@ -73,3 +73,23 @@ SerialPortRead (
   return 0;

 }

 

+/**

+  Poll the serial device to see if there is any data waiting.

+

+  If there is data waiting to be read from the serial port, then return

+  TRUE.  If there is no data waiting to be read from the serial port, then 

+  return FALSE.

+

+  @retval FALSE            There is no data waiting to be read.

+

+**/

+BOOLEAN

+EFIAPI

+SerialPortPoll (

+  VOID

+  )

+{

+  return FALSE; 

+} 

+

+ 
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