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Serial.h

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #ifndef MBED_SERIAL_H
00017 #define MBED_SERIAL_H
00018 
00019 #include "platform/platform.h"
00020 
00021 #if defined (DEVICE_SERIAL) || defined(DOXYGEN_ONLY)
00022 
00023 #include "platform/Stream.h"
00024 #include "SerialBase.h"
00025 #include "platform/PlatformMutex.h"
00026 #include "hal/serial_api.h"
00027 #include "platform/NonCopyable.h"
00028 
00029 namespace mbed {
00030 /** \addtogroup drivers */
00031 
00032 /** A serial port (UART) for communication with other serial devices
00033  *
00034  * Can be used for Full Duplex communication, or Simplex by specifying
00035  * one pin as NC (Not Connected)
00036  *
00037  * @note Synchronization level: Thread safe
00038  *
00039  * Example:
00040  * @code
00041  * // Print "Hello World" to the PC
00042  *
00043  * #include "mbed.h"
00044  *
00045  * Serial pc(USBTX, USBRX);
00046  *
00047  * int main() {
00048  *     pc.printf("Hello World\n");
00049  * }
00050  * @endcode
00051  * @ingroup drivers
00052  */
00053 class Serial : public SerialBase, public Stream, private NonCopyable<Serial> {
00054 
00055 public:
00056 #if DEVICE_SERIAL_ASYNCH
00057     using SerialBase::read;
00058     using SerialBase::write;
00059 #endif
00060 
00061     /** Create a Serial port, connected to the specified transmit and receive pins
00062      *
00063      *  @param tx Transmit pin
00064      *  @param rx Receive pin
00065      *  @param name The name of the stream associated with this serial port (optional)
00066      *  @param baud The baud rate of the serial port (optional, defaults to MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE or 9600)
00067      *
00068      *  @note
00069      *    Either tx or rx may be specified as NC (Not Connected) if unused
00070      */
00071     Serial(PinName tx, PinName rx, const char *name = NULL, int baud = MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE);
00072 
00073 
00074     /** Create a Serial port, connected to the specified transmit and receive pins, with the specified baud
00075      *
00076      *  @param tx Transmit pin
00077      *  @param rx Receive pin
00078      *  @param baud The baud rate of the serial port
00079      *
00080      *  @note
00081      *    Either tx or rx may be specified as NC (Not Connected) if unused
00082      */
00083     Serial(PinName tx, PinName rx, int baud);
00084 
00085     /* Stream gives us a FileHandle with non-functional poll()/readable()/writable. Pass through
00086      * the calls from the SerialBase instead for backwards compatibility. This problem is
00087      * part of why Stream and Serial should be deprecated.
00088      */
00089     bool readable()
00090     {
00091         return SerialBase::readable();
00092     }
00093     bool writable()
00094     {
00095         return SerialBase::writeable();
00096     }
00097     bool writeable()
00098     {
00099         return SerialBase::writeable();
00100     }
00101 
00102 #if !(DOXYGEN_ONLY)
00103 protected:
00104     virtual int _getc();
00105     virtual int _putc(int c);
00106     virtual void lock();
00107     virtual void unlock();
00108 
00109     PlatformMutex _mutex;
00110 #endif
00111 };
00112 
00113 } // namespace mbed
00114 
00115 #endif
00116 
00117 #endif