Jonathan Piat / mbed-src

mbed library sources

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api/Serial.h@15:4892fe388435, 2013-08-07 (annotated)

Committer:
bogdanm
Date:
Wed Aug 07 16:43:59 2013 +0300
Revision:
15:4892fe388435
Parent:
13:0645d8841f51
Child:
36:ab3ee77451e7
Added LPC4088 target and interrupt chaining code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_SERIAL_H
bogdanm 13:0645d8841f51 17 #define MBED_SERIAL_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "platform.h"
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 #if DEVICE_SERIAL
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 #include "Stream.h"
bogdanm 13:0645d8841f51 24 #include "FunctionPointer.h"
bogdanm 13:0645d8841f51 25 #include "serial_api.h"
bogdanm 15:4892fe388435 26 #include "CallChain.h"
bogdanm 13:0645d8841f51 27
bogdanm 13:0645d8841f51 28 namespace mbed {
bogdanm 13:0645d8841f51 29
bogdanm 13:0645d8841f51 30 /** A serial port (UART) for communication with other serial devices
bogdanm 13:0645d8841f51 31 *
bogdanm 13:0645d8841f51 32 * Can be used for Full Duplex communication, or Simplex by specifying
bogdanm 13:0645d8841f51 33 * one pin as NC (Not Connected)
bogdanm 13:0645d8841f51 34 *
bogdanm 13:0645d8841f51 35 * Example:
bogdanm 13:0645d8841f51 36 * @code
bogdanm 13:0645d8841f51 37 * // Print "Hello World" to the PC
bogdanm 13:0645d8841f51 38 *
bogdanm 13:0645d8841f51 39 * #include "mbed.h"
bogdanm 13:0645d8841f51 40 *
bogdanm 13:0645d8841f51 41 * Serial pc(USBTX, USBRX);
bogdanm 13:0645d8841f51 42 *
bogdanm 13:0645d8841f51 43 * int main() {
bogdanm 13:0645d8841f51 44 * pc.printf("Hello World\n");
bogdanm 13:0645d8841f51 45 * }
bogdanm 13:0645d8841f51 46 * @endcode
bogdanm 13:0645d8841f51 47 */
bogdanm 13:0645d8841f51 48 class Serial : public Stream {
bogdanm 13:0645d8841f51 49
bogdanm 13:0645d8841f51 50 public:
bogdanm 13:0645d8841f51 51 /** Create a Serial port, connected to the specified transmit and receive pins
bogdanm 13:0645d8841f51 52 *
bogdanm 13:0645d8841f51 53 * @param tx Transmit pin
bogdanm 13:0645d8841f51 54 * @param rx Receive pin
bogdanm 13:0645d8841f51 55 *
bogdanm 13:0645d8841f51 56 * @note
bogdanm 13:0645d8841f51 57 * Either tx or rx may be specified as NC if unused
bogdanm 13:0645d8841f51 58 */
bogdanm 13:0645d8841f51 59 Serial(PinName tx, PinName rx, const char *name=NULL);
bogdanm 13:0645d8841f51 60
bogdanm 13:0645d8841f51 61 /** Set the baud rate of the serial port
bogdanm 13:0645d8841f51 62 *
bogdanm 13:0645d8841f51 63 * @param baudrate The baudrate of the serial port (default = 9600).
bogdanm 13:0645d8841f51 64 */
bogdanm 13:0645d8841f51 65 void baud(int baudrate);
bogdanm 13:0645d8841f51 66
bogdanm 13:0645d8841f51 67 enum Parity {
bogdanm 13:0645d8841f51 68 None = 0,
bogdanm 13:0645d8841f51 69 Odd,
bogdanm 13:0645d8841f51 70 Even,
bogdanm 13:0645d8841f51 71 Forced1,
bogdanm 13:0645d8841f51 72 Forced0
bogdanm 13:0645d8841f51 73 };
bogdanm 13:0645d8841f51 74
bogdanm 13:0645d8841f51 75 enum IrqType {
bogdanm 13:0645d8841f51 76 RxIrq = 0,
bogdanm 13:0645d8841f51 77 TxIrq
bogdanm 13:0645d8841f51 78 };
bogdanm 13:0645d8841f51 79
bogdanm 13:0645d8841f51 80 /** Set the transmission format used by the Serial port
bogdanm 13:0645d8841f51 81 *
bogdanm 13:0645d8841f51 82 * @param bits The number of bits in a word (5-8; default = 8)
bogdanm 13:0645d8841f51 83 * @param parity The parity used (Serial::None, Serial::Odd, Serial::Even, Serial::Forced1, Serial::Forced0; default = Serial::None)
bogdanm 13:0645d8841f51 84 * @param stop The number of stop bits (1 or 2; default = 1)
bogdanm 13:0645d8841f51 85 */
bogdanm 15:4892fe388435 86 void format(int bits=8, Parity parity=Serial::None, int stop_bits=1);
bogdanm 13:0645d8841f51 87
bogdanm 13:0645d8841f51 88 /** Determine if there is a character available to read
bogdanm 13:0645d8841f51 89 *
bogdanm 13:0645d8841f51 90 * @returns
bogdanm 13:0645d8841f51 91 * 1 if there is a character available to read,
bogdanm 13:0645d8841f51 92 * 0 otherwise
bogdanm 13:0645d8841f51 93 */
bogdanm 13:0645d8841f51 94 int readable();
bogdanm 13:0645d8841f51 95
bogdanm 13:0645d8841f51 96 /** Determine if there is space available to write a character
bogdanm 13:0645d8841f51 97 *
bogdanm 13:0645d8841f51 98 * @returns
bogdanm 13:0645d8841f51 99 * 1 if there is space to write a character,
bogdanm 13:0645d8841f51 100 * 0 otherwise
bogdanm 13:0645d8841f51 101 */
bogdanm 13:0645d8841f51 102 int writeable();
bogdanm 13:0645d8841f51 103
bogdanm 13:0645d8841f51 104 /** Attach a function to call whenever a serial interrupt is generated
bogdanm 13:0645d8841f51 105 *
bogdanm 13:0645d8841f51 106 * @param fptr A pointer to a void function, or 0 to set as none
bogdanm 13:0645d8841f51 107 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 108 *
bogdanm 15:4892fe388435 109 * @returns
bogdanm 15:4892fe388435 110 * The function object created for 'fptr'
bogdanm 13:0645d8841f51 111 */
bogdanm 15:4892fe388435 112 pFunctionPointer_t attach(void (*fptr)(void), IrqType type=RxIrq);
bogdanm 15:4892fe388435 113
bogdanm 15:4892fe388435 114 /** Add a function to be called when a serial interrupt is generated at the end of the call chain
bogdanm 15:4892fe388435 115 *
bogdanm 15:4892fe388435 116 * @param fptr the function to add
bogdanm 15:4892fe388435 117 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 118 *
bogdanm 15:4892fe388435 119 * @returns
bogdanm 15:4892fe388435 120 * The function object created for 'fptr'
bogdanm 15:4892fe388435 121 */
bogdanm 15:4892fe388435 122 pFunctionPointer_t add_handler(void (*fptr)(void), IrqType type=RxIrq) {
bogdanm 15:4892fe388435 123 return add_handler_helper(fptr, type);
bogdanm 15:4892fe388435 124 }
bogdanm 15:4892fe388435 125
bogdanm 15:4892fe388435 126 /** Add a function to be called when a serial interrupt is generated at the beginning of the call chain
bogdanm 15:4892fe388435 127 *
bogdanm 15:4892fe388435 128 * @param fptr the function to add
bogdanm 15:4892fe388435 129 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 130 *
bogdanm 15:4892fe388435 131 * @returns
bogdanm 15:4892fe388435 132 * The function object created for 'fptr'
bogdanm 15:4892fe388435 133 */
bogdanm 15:4892fe388435 134 pFunctionPointer_t add_handler_front(void (*fptr)(void), IrqType type=RxIrq) {
bogdanm 15:4892fe388435 135 return add_handler_helper(fptr, type, true);
bogdanm 15:4892fe388435 136 }
bogdanm 13:0645d8841f51 137
bogdanm 13:0645d8841f51 138 /** Attach a member function to call whenever a serial interrupt is generated
bogdanm 13:0645d8841f51 139 *
bogdanm 13:0645d8841f51 140 * @param tptr pointer to the object to call the member function on
bogdanm 13:0645d8841f51 141 * @param mptr pointer to the member function to be called
bogdanm 13:0645d8841f51 142 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 143 *
bogdanm 15:4892fe388435 144 * @param
bogdanm 15:4892fe388435 145 * The function object created for 'tptr' and 'mptr'
bogdanm 15:4892fe388435 146 */
bogdanm 15:4892fe388435 147 template<typename T>
bogdanm 15:4892fe388435 148 pFunctionPointer_t attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
bogdanm 15:4892fe388435 149 if((mptr != NULL) && (tptr != NULL)) {
bogdanm 15:4892fe388435 150 _irq[type].clear();
bogdanm 15:4892fe388435 151 pFunctionPointer_t pf = _irq[type].add(tptr, mptr);
bogdanm 15:4892fe388435 152 serial_irq_set(&_serial, (SerialIrq)type, 1);
bogdanm 15:4892fe388435 153 return pf;
bogdanm 15:4892fe388435 154 }
bogdanm 15:4892fe388435 155 else
bogdanm 15:4892fe388435 156 return NULL;
bogdanm 15:4892fe388435 157 }
bogdanm 15:4892fe388435 158
bogdanm 15:4892fe388435 159 /** Add a function to be called when a serial interrupt is generated at the end of the call chain
bogdanm 15:4892fe388435 160 *
bogdanm 15:4892fe388435 161 * @param tptr pointer to the object to call the member function on
bogdanm 15:4892fe388435 162 * @param mptr pointer to the member function to be called
bogdanm 15:4892fe388435 163 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 164 *
bogdanm 15:4892fe388435 165 * @returns
bogdanm 15:4892fe388435 166 * The function object created for 'fptr'
bogdanm 13:0645d8841f51 167 */
bogdanm 13:0645d8841f51 168 template<typename T>
bogdanm 15:4892fe388435 169 pFunctionPointer_t add_handler(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
bogdanm 15:4892fe388435 170 return add_handler_helper(tptr, mptr, type);
bogdanm 13:0645d8841f51 171 }
bogdanm 13:0645d8841f51 172
bogdanm 15:4892fe388435 173 /** Add a function to be called when a serial interrupt is generated at the beginning of the call chain
bogdanm 15:4892fe388435 174 *
bogdanm 15:4892fe388435 175 * @param tptr pointer to the object to call the member function on
bogdanm 15:4892fe388435 176 * @param mptr pointer to the member function to be called
bogdanm 15:4892fe388435 177 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 178 *
bogdanm 15:4892fe388435 179 * @returns
bogdanm 15:4892fe388435 180 * The function object created for 'fptr'
bogdanm 15:4892fe388435 181 */
bogdanm 15:4892fe388435 182 template<typename T>
bogdanm 15:4892fe388435 183 pFunctionPointer_t add_handler_front(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
bogdanm 15:4892fe388435 184 return add_handler_helper(tptr, mptr, type, true);
bogdanm 15:4892fe388435 185 }
bogdanm 15:4892fe388435 186
bogdanm 15:4892fe388435 187 /** Remove a function from the list of functions to be called when a serial interrupt is generated
bogdanm 15:4892fe388435 188 *
bogdanm 15:4892fe388435 189 * @param pf the function object to remove
bogdanm 15:4892fe388435 190 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 15:4892fe388435 191 *
bogdanm 15:4892fe388435 192 * @returns
bogdanm 15:4892fe388435 193 * true if the function was found and removed, false otherwise
bogdanm 15:4892fe388435 194 */
bogdanm 15:4892fe388435 195 bool remove_handler(pFunctionPointer_t pf, IrqType type=RxIrq);
bogdanm 15:4892fe388435 196
bogdanm 13:0645d8841f51 197 /** Generate a break condition on the serial line
bogdanm 13:0645d8841f51 198 */
bogdanm 13:0645d8841f51 199 void send_break();
bogdanm 13:0645d8841f51 200
bogdanm 13:0645d8841f51 201 static void _irq_handler(uint32_t id, SerialIrq irq_type);
bogdanm 13:0645d8841f51 202
bogdanm 13:0645d8841f51 203 protected:
bogdanm 13:0645d8841f51 204 virtual int _getc();
bogdanm 13:0645d8841f51 205 virtual int _putc(int c);
bogdanm 15:4892fe388435 206 pFunctionPointer_t add_handler_helper(void (*function)(void), IrqType type, bool front=false);
bogdanm 15:4892fe388435 207
bogdanm 15:4892fe388435 208 template<typename T>
bogdanm 15:4892fe388435 209 pFunctionPointer_t add_handler_helper(T* tptr, void (T::*mptr)(void), IrqType type, bool front=false) {
bogdanm 15:4892fe388435 210 if ((mptr != NULL) && (tptr != NULL)) {
bogdanm 15:4892fe388435 211 pFunctionPointer_t pf = front ? _irq[type].add_front(tptr, mptr) : _irq[type].add(tptr, mptr);
bogdanm 15:4892fe388435 212 serial_irq_set(&_serial, (SerialIrq)type, 1);
bogdanm 15:4892fe388435 213 return pf;
bogdanm 15:4892fe388435 214 }
bogdanm 15:4892fe388435 215 else
bogdanm 15:4892fe388435 216 return NULL;
bogdanm 15:4892fe388435 217 }
bogdanm 13:0645d8841f51 218
bogdanm 13:0645d8841f51 219 serial_t _serial;
bogdanm 15:4892fe388435 220 CallChain _irq[2];
bogdanm 13:0645d8841f51 221 int _baud;
bogdanm 13:0645d8841f51 222 };
bogdanm 13:0645d8841f51 223
bogdanm 13:0645d8841f51 224 } // namespace mbed
bogdanm 13:0645d8841f51 225
bogdanm 13:0645d8841f51 226 #endif
bogdanm 13:0645d8841f51 227
bogdanm 13:0645d8841f51 228 #endif