jesus antonio lopez / mbed

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Fork of mbed by mbed official

Serial.h@44:24d45a770a51, 2012-11-21 (annotated)

Committer:
emilmont
Date:
Wed Nov 21 10:49:56 2012 +0000
Revision:
44:24d45a770a51
Parent:
43:e2ed12d17f06
Child:
51:a076018f59af
Complete refactoring of the mbed library to move the target dependent code to a thin well defined layer, defining a proper object oriented C API to be implemented by the different silicon vendors.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 44:24d45a770a51 1 /* mbed Microcontroller Library
emilmont 44:24d45a770a51 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 44:24d45a770a51 3 *
emilmont 44:24d45a770a51 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 44:24d45a770a51 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 44:24d45a770a51 6 * in the Software without restriction, including without limitation the rights
emilmont 44:24d45a770a51 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 44:24d45a770a51 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 44:24d45a770a51 9 * furnished to do so, subject to the following conditions:
emilmont 44:24d45a770a51 10 *
emilmont 44:24d45a770a51 11 * The above copyright notice and this permission notice shall be included in
emilmont 44:24d45a770a51 12 * all copies or substantial portions of the Software.
emilmont 44:24d45a770a51 13 *
emilmont 44:24d45a770a51 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 44:24d45a770a51 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 44:24d45a770a51 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 44:24d45a770a51 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 44:24d45a770a51 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 44:24d45a770a51 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 44:24d45a770a51 20 * SOFTWARE.
emilmont 44:24d45a770a51 21 */
emilmont 44:24d45a770a51 22 #ifndef MBED_SERIAL_H
emilmont 44:24d45a770a51 23 #define MBED_SERIAL_H
emilmont 44:24d45a770a51 24
emilmont 44:24d45a770a51 25 #include "platform.h"
emilmont 44:24d45a770a51 26
emilmont 44:24d45a770a51 27 #if DEVICE_SERIAL
emilmont 44:24d45a770a51 28
emilmont 44:24d45a770a51 29 #include "Stream.h"
emilmont 44:24d45a770a51 30 #include "FunctionPointer.h"
emilmont 44:24d45a770a51 31 #include "serial_api.h"
emilmont 44:24d45a770a51 32
emilmont 44:24d45a770a51 33 namespace mbed {
emilmont 44:24d45a770a51 34
emilmont 44:24d45a770a51 35 /** A serial port (UART) for communication with other serial devices
emilmont 44:24d45a770a51 36 *
emilmont 44:24d45a770a51 37 * Can be used for Full Duplex communication, or Simplex by specifying
emilmont 44:24d45a770a51 38 * one pin as NC (Not Connected)
emilmont 44:24d45a770a51 39 *
emilmont 44:24d45a770a51 40 * Example:
emilmont 44:24d45a770a51 41 * @code
emilmont 44:24d45a770a51 42 * // Print "Hello World" to the PC
emilmont 44:24d45a770a51 43 *
emilmont 44:24d45a770a51 44 * #include "mbed.h"
emilmont 44:24d45a770a51 45 *
emilmont 44:24d45a770a51 46 * Serial pc(USBTX, USBRX);
emilmont 44:24d45a770a51 47 *
emilmont 44:24d45a770a51 48 * int main() {
emilmont 44:24d45a770a51 49 * pc.printf("Hello World\n");
emilmont 44:24d45a770a51 50 * }
emilmont 44:24d45a770a51 51 * @endcode
emilmont 44:24d45a770a51 52 */
emilmont 44:24d45a770a51 53 class Serial : public Stream {
emilmont 44:24d45a770a51 54
emilmont 44:24d45a770a51 55 public:
emilmont 44:24d45a770a51 56
emilmont 44:24d45a770a51 57 /** Create a Serial port, connected to the specified transmit and receive pins
emilmont 44:24d45a770a51 58 *
emilmont 44:24d45a770a51 59 * @param tx Transmit pin
emilmont 44:24d45a770a51 60 * @param rx Receive pin
emilmont 44:24d45a770a51 61 *
emilmont 44:24d45a770a51 62 * @note
emilmont 44:24d45a770a51 63 * Either tx or rx may be specified as NC if unused
emilmont 44:24d45a770a51 64 */
emilmont 44:24d45a770a51 65 Serial(PinName tx, PinName rx) {
emilmont 44:24d45a770a51 66 serial_init(&_serial, tx, rx);
emilmont 44:24d45a770a51 67 serial_irq_handler(&_serial, Serial::_irq_handler, (uint32_t)this);
emilmont 44:24d45a770a51 68 }
emilmont 44:24d45a770a51 69
emilmont 44:24d45a770a51 70 /** Set the baud rate of the serial port
emilmont 44:24d45a770a51 71 *
emilmont 44:24d45a770a51 72 * @param baudrate The baudrate of the serial port (default = 9600).
emilmont 44:24d45a770a51 73 */
emilmont 44:24d45a770a51 74 void baud(int baudrate) {
emilmont 44:24d45a770a51 75 serial_baud(&_serial, baudrate);
emilmont 44:24d45a770a51 76 }
emilmont 44:24d45a770a51 77
emilmont 44:24d45a770a51 78 /** Set the transmission format used by the Serial port
emilmont 44:24d45a770a51 79 *
emilmont 44:24d45a770a51 80 * @param bits The number of bits in a word (5-8; default = 8)
emilmont 44:24d45a770a51 81 * @param parity The parity used (Serial::None, Serial::Odd, Serial::Even, Serial::Forced1, Serial::Forced0; default = Serial::None)
emilmont 44:24d45a770a51 82 * @param stop The number of stop bits (1 or 2; default = 1)
emilmont 44:24d45a770a51 83 */
emilmont 44:24d45a770a51 84 void format(int bits = 8, SerialParity parity=ParityNone, int stop_bits=1) {
emilmont 44:24d45a770a51 85 serial_format(&_serial, bits, parity, stop_bits);
emilmont 44:24d45a770a51 86 }
emilmont 44:24d45a770a51 87
emilmont 44:24d45a770a51 88 /** Determine if there is a character available to read
emilmont 44:24d45a770a51 89 *
emilmont 44:24d45a770a51 90 * @returns
emilmont 44:24d45a770a51 91 * 1 if there is a character available to read,
emilmont 44:24d45a770a51 92 * 0 otherwise
emilmont 44:24d45a770a51 93 */
emilmont 44:24d45a770a51 94 int readable() {
emilmont 44:24d45a770a51 95 return serial_readable(&_serial);
emilmont 44:24d45a770a51 96 }
emilmont 44:24d45a770a51 97
emilmont 44:24d45a770a51 98 /** Determine if there is space available to write a character
emilmont 44:24d45a770a51 99 *
emilmont 44:24d45a770a51 100 * @returns
emilmont 44:24d45a770a51 101 * 1 if there is space to write a character,
emilmont 44:24d45a770a51 102 * 0 otherwise
emilmont 44:24d45a770a51 103 */
emilmont 44:24d45a770a51 104 int writeable() {
emilmont 44:24d45a770a51 105 return serial_writable(&_serial);
emilmont 44:24d45a770a51 106 }
emilmont 44:24d45a770a51 107
emilmont 44:24d45a770a51 108 /** Attach a function to call whenever a serial interrupt is generated
emilmont 44:24d45a770a51 109 *
emilmont 44:24d45a770a51 110 * @param fptr A pointer to a void function, or 0 to set as none
emilmont 44:24d45a770a51 111 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
emilmont 44:24d45a770a51 112 */
emilmont 44:24d45a770a51 113 void attach(void (*fptr)(void), SerialIrq type=RxIrq) {
emilmont 44:24d45a770a51 114 if (fptr) {
emilmont 44:24d45a770a51 115 _irq[type].attach(fptr);
emilmont 44:24d45a770a51 116 serial_irq_set(&_serial, type, 1);
emilmont 44:24d45a770a51 117 } else {
emilmont 44:24d45a770a51 118 serial_irq_set(&_serial, type, 0);
emilmont 44:24d45a770a51 119 }
emilmont 44:24d45a770a51 120 }
emilmont 44:24d45a770a51 121
emilmont 44:24d45a770a51 122 /** Attach a member function to call whenever a serial interrupt is generated
emilmont 44:24d45a770a51 123 *
emilmont 44:24d45a770a51 124 * @param tptr pointer to the object to call the member function on
emilmont 44:24d45a770a51 125 * @param mptr pointer to the member function to be called
emilmont 44:24d45a770a51 126 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
emilmont 44:24d45a770a51 127 */
emilmont 44:24d45a770a51 128 template<typename T>
emilmont 44:24d45a770a51 129 void attach(T* tptr, void (T::*mptr)(void), SerialIrq type=RxIrq) {
emilmont 44:24d45a770a51 130 if((mptr != NULL) && (tptr != NULL)) {
emilmont 44:24d45a770a51 131 _irq[type].attach(tptr, mptr);
emilmont 44:24d45a770a51 132 serial_irq_set(&_serial, type, 1);
emilmont 44:24d45a770a51 133 }
emilmont 44:24d45a770a51 134 }
emilmont 44:24d45a770a51 135
emilmont 44:24d45a770a51 136 static void _irq_handler(uint32_t id, SerialIrq irq_type) {
emilmont 44:24d45a770a51 137 Serial *handler = (Serial*)id;
emilmont 44:24d45a770a51 138 handler->_irq[irq_type].call();
emilmont 44:24d45a770a51 139 }
emilmont 44:24d45a770a51 140
emilmont 44:24d45a770a51 141 protected:
emilmont 44:24d45a770a51 142 virtual int _getc() {
emilmont 44:24d45a770a51 143 return serial_getc(&_serial);
emilmont 44:24d45a770a51 144 }
emilmont 44:24d45a770a51 145
emilmont 44:24d45a770a51 146 virtual int _putc(int c) {
emilmont 44:24d45a770a51 147 serial_putc(&_serial, c);
emilmont 44:24d45a770a51 148 return c;
emilmont 44:24d45a770a51 149 }
emilmont 44:24d45a770a51 150
emilmont 44:24d45a770a51 151 serial_t _serial;
emilmont 44:24d45a770a51 152 FunctionPointer _irq[2];
emilmont 44:24d45a770a51 153 };
emilmont 44:24d45a770a51 154
emilmont 44:24d45a770a51 155 } // namespace mbed
emilmont 44:24d45a770a51 156
emilmont 44:24d45a770a51 157 #endif
emilmont 44:24d45a770a51 158
emilmont 44:24d45a770a51 159 #endif