From a20be900c96e687639c0a9cb764edb04e3d5e483 Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Mon, 18 Nov 2019 14:26:31 +0100
Subject: [PATCH] segger-rtt: add SEGGER_RTT_GetAvailWriteSpace function

---
 3rd-party/segger-rtt/SEGGER_RTT.c | 17 +++++++++++++++++
 3rd-party/segger-rtt/SEGGER_RTT.h |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/3rd-party/segger-rtt/SEGGER_RTT.c b/3rd-party/segger-rtt/SEGGER_RTT.c
index 779a0e7c1..75b620f67 100644
--- a/3rd-party/segger-rtt/SEGGER_RTT.c
+++ b/3rd-party/segger-rtt/SEGGER_RTT.c
@@ -1696,5 +1696,22 @@ int SEGGER_RTT_TerminalOut (unsigned char TerminalId, const char* s) {
   return Status;
 }
 
+/*********************************************************************
+*
+*       SEGGER_RTT_GetAvailWriteSpace
+*    Returns the number of bytes that can be written to the ring
+*    buffer without blocking.
+*
+*  Parameters
+*    BufferIndex  Index of the buffer.
+*
+*  Return value
+*    Number of bytes that are free in the buffer.
+*/
+
+unsigned SEGGER_RTT_GetAvailWriteSpace (unsigned BufferIndex){
+  return _GetAvailWriteSpace(&_SEGGER_RTT.aUp[BufferIndex]);
+}
+
 
 /*************************** End of file ****************************/
diff --git a/3rd-party/segger-rtt/SEGGER_RTT.h b/3rd-party/segger-rtt/SEGGER_RTT.h
index 71c380861..cc1b1a4af 100644
--- a/3rd-party/segger-rtt/SEGGER_RTT.h
+++ b/3rd-party/segger-rtt/SEGGER_RTT.h
@@ -219,6 +219,11 @@ void         SEGGER_RTT_WriteWithOverwriteNoLock(unsigned BufferIndex, const voi
 unsigned     SEGGER_RTT_PutChar                 (unsigned BufferIndex, char c);
 unsigned     SEGGER_RTT_PutCharSkip             (unsigned BufferIndex, char c);
 unsigned     SEGGER_RTT_PutCharSkipNoLock       (unsigned BufferIndex, char c);
+
+// BK addition
+unsigned     SEGGER_RTT_GetAvailWriteSpace      (unsigned BufferIndex);
+
+
 //
 // Function macro for performance optimization
 //