Bei Chen Liu / mbed-src

mbed library sources

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cpp/Serial.h@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

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mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #ifndef MBED_SERIAL_H
mbed_official 0:fd0d7bdfcdc2 23 #define MBED_SERIAL_H
mbed_official 0:fd0d7bdfcdc2 24
mbed_official 0:fd0d7bdfcdc2 25 #include "platform.h"
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 #if DEVICE_SERIAL
mbed_official 0:fd0d7bdfcdc2 28
mbed_official 0:fd0d7bdfcdc2 29 #include "Stream.h"
mbed_official 0:fd0d7bdfcdc2 30 #include "FunctionPointer.h"
mbed_official 0:fd0d7bdfcdc2 31 #include "serial_api.h"
mbed_official 0:fd0d7bdfcdc2 32
mbed_official 0:fd0d7bdfcdc2 33 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 34
mbed_official 0:fd0d7bdfcdc2 35 /** A serial port (UART) for communication with other serial devices
mbed_official 0:fd0d7bdfcdc2 36 *
mbed_official 0:fd0d7bdfcdc2 37 * Can be used for Full Duplex communication, or Simplex by specifying
mbed_official 0:fd0d7bdfcdc2 38 * one pin as NC (Not Connected)
mbed_official 0:fd0d7bdfcdc2 39 *
mbed_official 0:fd0d7bdfcdc2 40 * Example:
mbed_official 0:fd0d7bdfcdc2 41 * @code
mbed_official 0:fd0d7bdfcdc2 42 * // Print "Hello World" to the PC
mbed_official 0:fd0d7bdfcdc2 43 *
mbed_official 0:fd0d7bdfcdc2 44 * #include "mbed.h"
mbed_official 0:fd0d7bdfcdc2 45 *
mbed_official 0:fd0d7bdfcdc2 46 * Serial pc(USBTX, USBRX);
mbed_official 0:fd0d7bdfcdc2 47 *
mbed_official 0:fd0d7bdfcdc2 48 * int main() {
mbed_official 0:fd0d7bdfcdc2 49 * pc.printf("Hello World\n");
mbed_official 0:fd0d7bdfcdc2 50 * }
mbed_official 0:fd0d7bdfcdc2 51 * @endcode
mbed_official 0:fd0d7bdfcdc2 52 */
mbed_official 0:fd0d7bdfcdc2 53 class Serial : public Stream {
mbed_official 0:fd0d7bdfcdc2 54
mbed_official 0:fd0d7bdfcdc2 55 public:
mbed_official 0:fd0d7bdfcdc2 56
mbed_official 0:fd0d7bdfcdc2 57 /** Create a Serial port, connected to the specified transmit and receive pins
mbed_official 0:fd0d7bdfcdc2 58 *
mbed_official 0:fd0d7bdfcdc2 59 * @param tx Transmit pin
mbed_official 0:fd0d7bdfcdc2 60 * @param rx Receive pin
mbed_official 0:fd0d7bdfcdc2 61 *
mbed_official 0:fd0d7bdfcdc2 62 * @note
mbed_official 0:fd0d7bdfcdc2 63 * Either tx or rx may be specified as NC if unused
mbed_official 0:fd0d7bdfcdc2 64 */
mbed_official 0:fd0d7bdfcdc2 65 Serial(PinName tx, PinName rx) {
mbed_official 0:fd0d7bdfcdc2 66 serial_init(&_serial, tx, rx);
mbed_official 0:fd0d7bdfcdc2 67 serial_irq_handler(&_serial, Serial::_irq_handler, (uint32_t)this);
mbed_official 0:fd0d7bdfcdc2 68 }
mbed_official 0:fd0d7bdfcdc2 69
mbed_official 0:fd0d7bdfcdc2 70 /** Set the baud rate of the serial port
mbed_official 0:fd0d7bdfcdc2 71 *
mbed_official 0:fd0d7bdfcdc2 72 * @param baudrate The baudrate of the serial port (default = 9600).
mbed_official 0:fd0d7bdfcdc2 73 */
mbed_official 0:fd0d7bdfcdc2 74 void baud(int baudrate) {
mbed_official 0:fd0d7bdfcdc2 75 serial_baud(&_serial, baudrate);
mbed_official 0:fd0d7bdfcdc2 76 }
mbed_official 0:fd0d7bdfcdc2 77
mbed_official 0:fd0d7bdfcdc2 78 /** Set the transmission format used by the Serial port
mbed_official 0:fd0d7bdfcdc2 79 *
mbed_official 0:fd0d7bdfcdc2 80 * @param bits The number of bits in a word (5-8; default = 8)
mbed_official 0:fd0d7bdfcdc2 81 * @param parity The parity used (Serial::None, Serial::Odd, Serial::Even, Serial::Forced1, Serial::Forced0; default = Serial::None)
mbed_official 0:fd0d7bdfcdc2 82 * @param stop The number of stop bits (1 or 2; default = 1)
mbed_official 0:fd0d7bdfcdc2 83 */
mbed_official 0:fd0d7bdfcdc2 84 void format(int bits = 8, SerialParity parity=ParityNone, int stop_bits=1) {
mbed_official 0:fd0d7bdfcdc2 85 serial_format(&_serial, bits, parity, stop_bits);
mbed_official 0:fd0d7bdfcdc2 86 }
mbed_official 0:fd0d7bdfcdc2 87
mbed_official 0:fd0d7bdfcdc2 88 /** Determine if there is a character available to read
mbed_official 0:fd0d7bdfcdc2 89 *
mbed_official 0:fd0d7bdfcdc2 90 * @returns
mbed_official 0:fd0d7bdfcdc2 91 * 1 if there is a character available to read,
mbed_official 0:fd0d7bdfcdc2 92 * 0 otherwise
mbed_official 0:fd0d7bdfcdc2 93 */
mbed_official 0:fd0d7bdfcdc2 94 int readable() {
mbed_official 0:fd0d7bdfcdc2 95 return serial_readable(&_serial);
mbed_official 0:fd0d7bdfcdc2 96 }
mbed_official 0:fd0d7bdfcdc2 97
mbed_official 0:fd0d7bdfcdc2 98 /** Determine if there is space available to write a character
mbed_official 0:fd0d7bdfcdc2 99 *
mbed_official 0:fd0d7bdfcdc2 100 * @returns
mbed_official 0:fd0d7bdfcdc2 101 * 1 if there is space to write a character,
mbed_official 0:fd0d7bdfcdc2 102 * 0 otherwise
mbed_official 0:fd0d7bdfcdc2 103 */
mbed_official 0:fd0d7bdfcdc2 104 int writeable() {
mbed_official 0:fd0d7bdfcdc2 105 return serial_writable(&_serial);
mbed_official 0:fd0d7bdfcdc2 106 }
mbed_official 0:fd0d7bdfcdc2 107
mbed_official 0:fd0d7bdfcdc2 108 /** Attach a function to call whenever a serial interrupt is generated
mbed_official 0:fd0d7bdfcdc2 109 *
mbed_official 0:fd0d7bdfcdc2 110 * @param fptr A pointer to a void function, or 0 to set as none
mbed_official 0:fd0d7bdfcdc2 111 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
mbed_official 0:fd0d7bdfcdc2 112 */
mbed_official 0:fd0d7bdfcdc2 113 void attach(void (*fptr)(void), SerialIrq type=RxIrq) {
mbed_official 0:fd0d7bdfcdc2 114 if (fptr) {
mbed_official 0:fd0d7bdfcdc2 115 _irq[type].attach(fptr);
mbed_official 0:fd0d7bdfcdc2 116 serial_irq_set(&_serial, type, 1);
mbed_official 0:fd0d7bdfcdc2 117 } else {
mbed_official 0:fd0d7bdfcdc2 118 serial_irq_set(&_serial, type, 0);
mbed_official 0:fd0d7bdfcdc2 119 }
mbed_official 0:fd0d7bdfcdc2 120 }
mbed_official 0:fd0d7bdfcdc2 121
mbed_official 0:fd0d7bdfcdc2 122 /** Attach a member function to call whenever a serial interrupt is generated
mbed_official 0:fd0d7bdfcdc2 123 *
mbed_official 0:fd0d7bdfcdc2 124 * @param tptr pointer to the object to call the member function on
mbed_official 0:fd0d7bdfcdc2 125 * @param mptr pointer to the member function to be called
mbed_official 0:fd0d7bdfcdc2 126 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
mbed_official 0:fd0d7bdfcdc2 127 */
mbed_official 0:fd0d7bdfcdc2 128 template<typename T>
mbed_official 0:fd0d7bdfcdc2 129 void attach(T* tptr, void (T::*mptr)(void), SerialIrq type=RxIrq) {
mbed_official 0:fd0d7bdfcdc2 130 if((mptr != NULL) && (tptr != NULL)) {
mbed_official 0:fd0d7bdfcdc2 131 _irq[type].attach(tptr, mptr);
mbed_official 0:fd0d7bdfcdc2 132 serial_irq_set(&_serial, type, 1);
mbed_official 0:fd0d7bdfcdc2 133 }
mbed_official 0:fd0d7bdfcdc2 134 }
mbed_official 0:fd0d7bdfcdc2 135
mbed_official 0:fd0d7bdfcdc2 136 static void _irq_handler(uint32_t id, SerialIrq irq_type) {
mbed_official 0:fd0d7bdfcdc2 137 Serial *handler = (Serial*)id;
mbed_official 0:fd0d7bdfcdc2 138 handler->_irq[irq_type].call();
mbed_official 0:fd0d7bdfcdc2 139 }
mbed_official 0:fd0d7bdfcdc2 140
mbed_official 0:fd0d7bdfcdc2 141 protected:
mbed_official 0:fd0d7bdfcdc2 142 virtual int _getc() {
mbed_official 0:fd0d7bdfcdc2 143 return serial_getc(&_serial);
mbed_official 0:fd0d7bdfcdc2 144 }
mbed_official 0:fd0d7bdfcdc2 145
mbed_official 0:fd0d7bdfcdc2 146 virtual int _putc(int c) {
mbed_official 0:fd0d7bdfcdc2 147 serial_putc(&_serial, c);
mbed_official 0:fd0d7bdfcdc2 148 return c;
mbed_official 0:fd0d7bdfcdc2 149 }
mbed_official 0:fd0d7bdfcdc2 150
mbed_official 0:fd0d7bdfcdc2 151 serial_t _serial;
mbed_official 0:fd0d7bdfcdc2 152 FunctionPointer _irq[2];
mbed_official 0:fd0d7bdfcdc2 153 };
mbed_official 0:fd0d7bdfcdc2 154
mbed_official 0:fd0d7bdfcdc2 155 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 156
mbed_official 0:fd0d7bdfcdc2 157 #endif
mbed_official 0:fd0d7bdfcdc2 158
mbed_official 0:fd0d7bdfcdc2 159 #endif