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Diff: SerialBase.h
- Revision:
- 68:f37f3b9c9f0b
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- 75:dc225afb6914
diff -r a9913a65894f -r f37f3b9c9f0b SerialBase.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SerialBase.h Wed Oct 23 16:23:06 2013 +0300 @@ -0,0 +1,120 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBED_SERIALBASE_H +#define MBED_SERIALBASE_H + +#include "platform.h" + +#if DEVICE_SERIAL + +#include "Stream.h" +#include "FunctionPointer.h" +#include "serial_api.h" + +namespace mbed { + +/** A base class for serial port implementations + * Can't be instantiated directly (use Serial or RawSerial) + */ +class SerialBase { + +public: + /** Set the baud rate of the serial port + * + * @param baudrate The baudrate of the serial port (default = 9600). + */ + void baud(int baudrate); + + enum Parity { + None = 0, + Odd, + Even, + Forced1, + Forced0 + }; + + enum IrqType { + RxIrq = 0, + TxIrq + }; + + /** Set the transmission format used by the serial port + * + * @param bits The number of bits in a word (5-8; default = 8) + * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None) + * @param stop The number of stop bits (1 or 2; default = 1) + */ + void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1); + + /** Determine if there is a character available to read + * + * @returns + * 1 if there is a character available to read, + * 0 otherwise + */ + int readable(); + + /** Determine if there is space available to write a character + * + * @returns + * 1 if there is space to write a character, + * 0 otherwise + */ + int writeable(); + + /** Attach a function to call whenever a serial interrupt is generated + * + * @param fptr A pointer to a void function, or 0 to set as none + * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) + */ + void attach(void (*fptr)(void), IrqType type=RxIrq); + + /** Attach a member function to call whenever a serial interrupt is generated + * + * @param tptr pointer to the object to call the member function on + * @param mptr pointer to the member function to be called + * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) + */ + template<typename T> + void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) { + if((mptr != NULL) && (tptr != NULL)) { + _irq[type].attach(tptr, mptr); + serial_irq_set(&_serial, (SerialIrq)type, 1); + } + } + + /** Generate a break condition on the serial line + */ + void send_break(); + + static void _irq_handler(uint32_t id, SerialIrq irq_type); + +protected: + SerialBase(PinName tx, PinName rx); + + int _base_getc(); + int _base_putc(int c); + + serial_t _serial; + FunctionPointer _irq[2]; + int _baud; +}; + +} // namespace mbed + +#endif + +#endif