tool/mbed/mbed-sdk/libraries/net/cellular/CellularUSBModem/serial/io/IOSerialStream.h

   1 /* IOSerialStream.h */
   2 /* Copyright (C) 2012 mbed.org, MIT License
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   5  * and associated documentation files (the "Software"), to deal in the Software without restriction,
   6  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
   7  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in all copies or
  11  * substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  14  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  17  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  18  */
  19 #ifndef IOSERIALSTREAM_H_
  20 #define IOSERIALSTREAM_H_
  21
  22 #include "core/fwk.h"
  23
  24 #include "RawSerial.h"
  25
  26 #include "rtos.h"
  27 #include "core/MtxCircBuffer.h"
  28
  29 /** Input Serial Stream for physical serial interfaces (UART...)
  30 This class is not thread-safe, except for the *Abort() methods that can be called by any thread/ISR
  31 */
  32 class IOSerialStream : public IOStream
  33 {
  34 public:
  35   enum { CIRCBUF_SIZE = 255 };
  36   IOSerialStream(mbed::RawSerial& serial);
  37   /*virtual*/ ~IOSerialStream();
  38
  39   //0 for non-blocking (returns immediately), osWaitForever for infinite blocking
  40   virtual int read(uint8_t* buf, size_t* pLength, size_t maxLength, uint32_t timeout=osWaitForever);
  41   virtual size_t available();
  42   virtual int waitAvailable(uint32_t timeout=osWaitForever); //Wait for data to be available
  43   virtual int abortRead(); //Abort current reading (or waiting) operation
  44
  45
  46   //0 for non-blocking (returns immediately), osWaitForever for infinite blocking
  47   virtual int write(uint8_t* buf, size_t length, uint32_t timeout=osWaitForever);
  48   virtual size_t space();
  49   virtual int waitSpace(uint32_t timeout=osWaitForever); //Wait for space to be available
  50   virtual int abortWrite(); //Abort current writing (or waiting) operation
  51
  52 private:
  53
  54   mbed::RawSerial& m_serial;
  55   volatile bool m_serialTxFifoEmpty;
  56
  57   void setupReadableISR(bool en);
  58   void readable(); //Callback from m_serial when new data is available
  59
  60   Semaphore m_availableSphre; //Used for signalling
  61
  62   void setupWriteableISR(bool en);
  63   void writeable(); //Callback from m_serial when new space is available
  64
  65   Semaphore m_spaceSphre; //Used for signalling
  66
  67   MtxCircBuffer<uint8_t, CIRCBUF_SIZE + 1> m_inBuf;
  68   MtxCircBuffer<uint8_t, CIRCBUF_SIZE + 1> m_outBuf;
  69
  70 };
  71
  72 #endif /* IOSERIALSTREAM_H_ */