Diff: serial/io/IOSerialStream.h

Revision:

0:8f57713b2147

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/serial/io/IOSerialStream.h	Wed Sep 12 09:34:21 2012 +0000
@@ -0,0 +1,72 @@
+/* IOSerialStream.h */
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * 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.
+ */
+#ifndef IOSERIALSTREAM_H_
+#define IOSERIALSTREAM_H_
+
+#include "core/fwk.h"
+
+#include "Serial.h"
+
+#include "rtos.h"
+#include "core/MtxCircBuffer.h"
+
+/** Input Serial Stream for physical serial interfaces (UART...)
+This class is not thread-safe, except for the *Abort() methods that can be called by any thread/ISR
+*/
+#define CIRCBUF_SIZE 255
+class IOSerialStream : public IOStream
+{
+public:
+  IOSerialStream(mbed::Serial& serial);
+  /*virtual*/ ~IOSerialStream();
+
+  //0 for non-blocking (returns immediately), osWaitForever for infinite blocking
+  virtual int read(uint8_t* buf, size_t* pLength, size_t maxLength, uint32_t timeout=osWaitForever);
+  virtual size_t available();
+  virtual int waitAvailable(uint32_t timeout=osWaitForever); //Wait for data to be available
+  virtual int abortRead(); //Abort current reading (or waiting) operation
+
+
+  //0 for non-blocking (returns immediately), osWaitForever for infinite blocking
+  virtual int write(uint8_t* buf, size_t length, uint32_t timeout=osWaitForever);
+  virtual size_t space();
+  virtual int waitSpace(uint32_t timeout=osWaitForever); //Wait for space to be available
+  virtual int abortWrite(); //Abort current writing (or waiting) operation
+
+private:
+
+  mbed::Serial& m_serial;
+  volatile bool m_serialTxFifoEmpty;
+
+  void setupReadableISR(bool en);
+  void readable(); //Callback from m_serial when new data is available
+
+  Semaphore m_availableSphre; //Used for signalling
+
+  void setupWriteableISR(bool en);
+  void writeable(); //Callback from m_serial when new space is available
+
+  Semaphore m_spaceSphre; //Used for signalling
+
+  MtxCircBuffer<uint8_t, CIRCBUF_SIZE + 1> m_inBuf;
+  MtxCircBuffer<uint8_t, CIRCBUF_SIZE + 1> m_outBuf;
+
+};
+
+#endif /* IOSERIALSTREAM_H_ */