Diff: retarget_segger_rtt.cpp

Revision:

0:7fca1bf48117

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/retarget_segger_rtt.cpp	Sat May 18 22:41:10 2019 +0000
@@ -0,0 +1,62 @@
+//----------------------------------------------------------------------------
+// Namespace:   mbed
+// Class:       SeggerRTT
+// Description: Alternative stdio read/write interface function for Segger RTT
+// Copyright:   (c) 2017-2019 Mark <0x6d61726b@gmail.com>
+// License:     MIT License
+// SVN:         $Id: retarget_segger_rtt.cpp 382 2019-05-18 22:37:59Z 0x6d61726b $
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//----------------------------------------------------------------------------
+#include "retarget_segger_rtt.h"
+#include "platform/mbed_retarget.h"
+#include "platform/mbed_poll.h"
+
+namespace mbed {
+    
+    // retarget stdin/stdout/stderr to Segger RTT
+    static SeggerRTT fhSeggerRtt;
+    FileHandle *mbed_target_override_console(int fd) {
+        return &fhSeggerRtt;
+    }
+    
+    ssize_t SeggerRTT::write(const void *buffer, size_t size) {
+        // write the buffer content to the terminal
+        return SEGGER_RTT_Write(0, buffer, size);
+    }
+    
+    ssize_t SeggerRTT::read(void *buffer, size_t size) {
+        // wait until a character becomes available
+        while (!SEGGER_RTT_HasKey()) {}
+    
+        // read the characters from the terminal into the buffer
+        return SEGGER_RTT_Read(0, buffer, size);
+    }
+    
+    short SeggerRTT::poll(short events) const {
+        short revents = 0;
+        if ((events & POLLIN) && SEGGER_RTT_HasKey()) {
+            revents |= POLLIN;
+        }
+        if (events & POLLOUT) {
+            revents |= POLLOUT;
+        }
+        return revents;
+    }
+}