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SerialBase.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_SERIALBASE_H 00017 #define MBED_SERIALBASE_H 00018 00019 #include "platform.h" 00020 00021 #if DEVICE_SERIAL 00022 00023 #include "Stream.h" 00024 #include "FunctionPointer.h" 00025 #include "serial_api.h" 00026 00027 namespace mbed { 00028 00029 /** A base class for serial port implementations 00030 * Can't be instantiated directly (use Serial or RawSerial) 00031 */ 00032 class SerialBase { 00033 00034 public: 00035 /** Set the baud rate of the serial port 00036 * 00037 * @param baudrate The baudrate of the serial port (default = 9600). 00038 */ 00039 void baud(int baudrate); 00040 00041 enum Parity { 00042 None = 0, 00043 Odd, 00044 Even, 00045 Forced1, 00046 Forced0 00047 }; 00048 00049 enum IrqType { 00050 RxIrq = 0, 00051 TxIrq 00052 }; 00053 00054 enum Flow { 00055 Disabled = 0, 00056 RTS, 00057 CTS, 00058 RTSCTS 00059 }; 00060 00061 /** Set the transmission format used by the serial port 00062 * 00063 * @param bits The number of bits in a word (5-8; default = 8) 00064 * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None) 00065 * @param stop The number of stop bits (1 or 2; default = 1) 00066 */ 00067 void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1); 00068 00069 /** Determine if there is a character available to read 00070 * 00071 * @returns 00072 * 1 if there is a character available to read, 00073 * 0 otherwise 00074 */ 00075 int readable(); 00076 00077 /** Determine if there is space available to write a character 00078 * 00079 * @returns 00080 * 1 if there is space to write a character, 00081 * 0 otherwise 00082 */ 00083 int writeable(); 00084 00085 /** Attach a function to call whenever a serial interrupt is generated 00086 * 00087 * @param fptr A pointer to a void function, or 0 to set as none 00088 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) 00089 */ 00090 void attach(void (*fptr)(void), IrqType type=RxIrq); 00091 00092 /** Attach a member function to call whenever a serial interrupt is generated 00093 * 00094 * @param tptr pointer to the object to call the member function on 00095 * @param mptr pointer to the member function to be called 00096 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) 00097 */ 00098 template<typename T> 00099 void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) { 00100 if((mptr != NULL) && (tptr != NULL)) { 00101 _irq[type].attach(tptr, mptr); 00102 serial_irq_set(&_serial, (SerialIrq)type, 1); 00103 } 00104 } 00105 00106 /** Generate a break condition on the serial line 00107 */ 00108 void send_break(); 00109 00110 #if DEVICE_SERIAL_FC 00111 /** Set the flow control type on the serial port 00112 * 00113 * @param type the flow control type (Disabled, RTS, CTS, RTSCTS) 00114 * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS) 00115 * @param flow2 the second flow control pin (CTS for RTSCTS) 00116 */ 00117 void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC); 00118 #endif 00119 00120 static void _irq_handler(uint32_t id, SerialIrq irq_type); 00121 00122 protected: 00123 SerialBase(PinName tx, PinName rx); 00124 virtual ~SerialBase() { 00125 } 00126 00127 int _base_getc(); 00128 int _base_putc(int c); 00129 00130 serial_t _serial; 00131 FunctionPointer _irq[2]; 00132 int _baud; 00133 }; 00134 00135 } // namespace mbed 00136 00137 #endif 00138 00139 #endif
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