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/* USBSerialStream.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 USBSERIALSTREAM_H_
#define USBSERIALSTREAM_H_
#include "core/fwk.h"
#include "USBHost3GModule/IUSBHostSerial.h"
#include "USBHost3GModule/IUSBHostSerialListener.h"
#include "rtos.h"
#include "core/MtxCircBuffer.h"
/* Input Serial Stream for USB virtual serial ports interfaces
This class is not thread-safe, except for the *Abort() methods that can be called by any thread/ISR
*/
class USBSerialStream : public IOStream, IUSBHostSerialListener
{
public:
enum { CIRCBUF_SIZE = 127 };
USBSerialStream(IUSBHostSerial& serial);
/*virtual*/ ~USBSerialStream();
//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:
IUSBHostSerial& m_serial;
volatile bool m_serialTxFifoEmpty;
void setupReadableISR(bool en);
virtual void readable(); //Callback from m_serial when new data is available
Semaphore m_availableSphre; //Used for signalling
void setupWriteableISR(bool en);
virtual 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 /* USBSERIALSTREAM_H_ */
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