Daniel Vizcaya / Mbed OS 04_RTOS_Embebidos

Entrega 3er corte - sistemas embebidos

mbed-os/drivers/SerialBase.h@0:6ad07c9019fd, 2018-05-30 (annotated)

Committer:
Bethory
Date:
Wed May 30 00:01:50 2018 +0000
Revision:
0:6ad07c9019fd
Codigo de tales para todos los pasculaes

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Bethory 0:6ad07c9019fd 1 /* mbed Microcontroller Library
Bethory 0:6ad07c9019fd 2 * Copyright (c) 2006-2013 ARM Limited
Bethory 0:6ad07c9019fd 3 *
Bethory 0:6ad07c9019fd 4 * Licensed under the Apache License, Version 2.0 (the "License");
Bethory 0:6ad07c9019fd 5 * you may not use this file except in compliance with the License.
Bethory 0:6ad07c9019fd 6 * You may obtain a copy of the License at
Bethory 0:6ad07c9019fd 7 *
Bethory 0:6ad07c9019fd 8 * http://www.apache.org/licenses/LICENSE-2.0
Bethory 0:6ad07c9019fd 9 *
Bethory 0:6ad07c9019fd 10 * Unless required by applicable law or agreed to in writing, software
Bethory 0:6ad07c9019fd 11 * distributed under the License is distributed on an "AS IS" BASIS,
Bethory 0:6ad07c9019fd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Bethory 0:6ad07c9019fd 13 * See the License for the specific language governing permissions and
Bethory 0:6ad07c9019fd 14 * limitations under the License.
Bethory 0:6ad07c9019fd 15 */
Bethory 0:6ad07c9019fd 16 #ifndef MBED_SERIALBASE_H
Bethory 0:6ad07c9019fd 17 #define MBED_SERIALBASE_H
Bethory 0:6ad07c9019fd 18
Bethory 0:6ad07c9019fd 19 #include "platform/platform.h"
Bethory 0:6ad07c9019fd 20
Bethory 0:6ad07c9019fd 21 #if defined (DEVICE_SERIAL) || defined(DOXYGEN_ONLY)
Bethory 0:6ad07c9019fd 22
Bethory 0:6ad07c9019fd 23 #include "Callback.h"
Bethory 0:6ad07c9019fd 24 #include "serial_api.h"
Bethory 0:6ad07c9019fd 25 #include "mbed_toolchain.h"
Bethory 0:6ad07c9019fd 26 #include "platform/NonCopyable.h"
Bethory 0:6ad07c9019fd 27
Bethory 0:6ad07c9019fd 28 #if DEVICE_SERIAL_ASYNCH
Bethory 0:6ad07c9019fd 29 #include "CThunk.h"
Bethory 0:6ad07c9019fd 30 #include "dma_api.h"
Bethory 0:6ad07c9019fd 31 #endif
Bethory 0:6ad07c9019fd 32
Bethory 0:6ad07c9019fd 33 namespace mbed {
Bethory 0:6ad07c9019fd 34 /** \addtogroup drivers */
Bethory 0:6ad07c9019fd 35
Bethory 0:6ad07c9019fd 36 /** A base class for serial port implementations
Bethory 0:6ad07c9019fd 37 * Can't be instantiated directly (use Serial or RawSerial)
Bethory 0:6ad07c9019fd 38 *
Bethory 0:6ad07c9019fd 39 * @note Synchronization level: Set by subclass
Bethory 0:6ad07c9019fd 40 * @ingroup drivers
Bethory 0:6ad07c9019fd 41 */
Bethory 0:6ad07c9019fd 42 class SerialBase : private NonCopyable<SerialBase> {
Bethory 0:6ad07c9019fd 43
Bethory 0:6ad07c9019fd 44 public:
Bethory 0:6ad07c9019fd 45 /** Set the baud rate of the serial port
Bethory 0:6ad07c9019fd 46 *
Bethory 0:6ad07c9019fd 47 * @param baudrate The baudrate of the serial port (default = 9600).
Bethory 0:6ad07c9019fd 48 */
Bethory 0:6ad07c9019fd 49 void baud(int baudrate);
Bethory 0:6ad07c9019fd 50
Bethory 0:6ad07c9019fd 51 enum Parity {
Bethory 0:6ad07c9019fd 52 None = 0,
Bethory 0:6ad07c9019fd 53 Odd,
Bethory 0:6ad07c9019fd 54 Even,
Bethory 0:6ad07c9019fd 55 Forced1,
Bethory 0:6ad07c9019fd 56 Forced0
Bethory 0:6ad07c9019fd 57 };
Bethory 0:6ad07c9019fd 58
Bethory 0:6ad07c9019fd 59 enum IrqType {
Bethory 0:6ad07c9019fd 60 RxIrq = 0,
Bethory 0:6ad07c9019fd 61 TxIrq,
Bethory 0:6ad07c9019fd 62
Bethory 0:6ad07c9019fd 63 IrqCnt
Bethory 0:6ad07c9019fd 64 };
Bethory 0:6ad07c9019fd 65
Bethory 0:6ad07c9019fd 66 enum Flow {
Bethory 0:6ad07c9019fd 67 Disabled = 0,
Bethory 0:6ad07c9019fd 68 RTS,
Bethory 0:6ad07c9019fd 69 CTS,
Bethory 0:6ad07c9019fd 70 RTSCTS
Bethory 0:6ad07c9019fd 71 };
Bethory 0:6ad07c9019fd 72
Bethory 0:6ad07c9019fd 73 /** Set the transmission format used by the serial port
Bethory 0:6ad07c9019fd 74 *
Bethory 0:6ad07c9019fd 75 * @param bits The number of bits in a word (5-8; default = 8)
Bethory 0:6ad07c9019fd 76 * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None)
Bethory 0:6ad07c9019fd 77 * @param stop_bits The number of stop bits (1 or 2; default = 1)
Bethory 0:6ad07c9019fd 78 */
Bethory 0:6ad07c9019fd 79 void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1);
Bethory 0:6ad07c9019fd 80
Bethory 0:6ad07c9019fd 81 /** Determine if there is a character available to read
Bethory 0:6ad07c9019fd 82 *
Bethory 0:6ad07c9019fd 83 * @returns
Bethory 0:6ad07c9019fd 84 * 1 if there is a character available to read,
Bethory 0:6ad07c9019fd 85 * 0 otherwise
Bethory 0:6ad07c9019fd 86 */
Bethory 0:6ad07c9019fd 87 int readable();
Bethory 0:6ad07c9019fd 88
Bethory 0:6ad07c9019fd 89 /** Determine if there is space available to write a character
Bethory 0:6ad07c9019fd 90 *
Bethory 0:6ad07c9019fd 91 * @returns
Bethory 0:6ad07c9019fd 92 * 1 if there is space to write a character,
Bethory 0:6ad07c9019fd 93 * 0 otherwise
Bethory 0:6ad07c9019fd 94 */
Bethory 0:6ad07c9019fd 95 int writeable();
Bethory 0:6ad07c9019fd 96
Bethory 0:6ad07c9019fd 97 /** Attach a function to call whenever a serial interrupt is generated
Bethory 0:6ad07c9019fd 98 *
Bethory 0:6ad07c9019fd 99 * @param func A pointer to a void function, or 0 to set as none
Bethory 0:6ad07c9019fd 100 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Bethory 0:6ad07c9019fd 101 */
Bethory 0:6ad07c9019fd 102 void attach(Callback<void()> func, IrqType type=RxIrq);
Bethory 0:6ad07c9019fd 103
Bethory 0:6ad07c9019fd 104 /** Attach a member function to call whenever a serial interrupt is generated
Bethory 0:6ad07c9019fd 105 *
Bethory 0:6ad07c9019fd 106 * @param obj pointer to the object to call the member function on
Bethory 0:6ad07c9019fd 107 * @param method pointer to the member function to be called
Bethory 0:6ad07c9019fd 108 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Bethory 0:6ad07c9019fd 109 * @deprecated
Bethory 0:6ad07c9019fd 110 * The attach function does not support cv-qualifiers. Replaced by
Bethory 0:6ad07c9019fd 111 * attach(callback(obj, method), type).
Bethory 0:6ad07c9019fd 112 */
Bethory 0:6ad07c9019fd 113 template<typename T>
Bethory 0:6ad07c9019fd 114 MBED_DEPRECATED_SINCE("mbed-os-5.1",
Bethory 0:6ad07c9019fd 115 "The attach function does not support cv-qualifiers. Replaced by "
Bethory 0:6ad07c9019fd 116 "attach(callback(obj, method), type).")
Bethory 0:6ad07c9019fd 117 void attach(T *obj, void (T::*method)(), IrqType type=RxIrq) {
Bethory 0:6ad07c9019fd 118 attach(callback(obj, method), type);
Bethory 0:6ad07c9019fd 119 }
Bethory 0:6ad07c9019fd 120
Bethory 0:6ad07c9019fd 121 /** Attach a member function to call whenever a serial interrupt is generated
Bethory 0:6ad07c9019fd 122 *
Bethory 0:6ad07c9019fd 123 * @param obj pointer to the object to call the member function on
Bethory 0:6ad07c9019fd 124 * @param method pointer to the member function to be called
Bethory 0:6ad07c9019fd 125 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Bethory 0:6ad07c9019fd 126 * @deprecated
Bethory 0:6ad07c9019fd 127 * The attach function does not support cv-qualifiers. Replaced by
Bethory 0:6ad07c9019fd 128 * attach(callback(obj, method), type).
Bethory 0:6ad07c9019fd 129 */
Bethory 0:6ad07c9019fd 130 template<typename T>
Bethory 0:6ad07c9019fd 131 MBED_DEPRECATED_SINCE("mbed-os-5.1",
Bethory 0:6ad07c9019fd 132 "The attach function does not support cv-qualifiers. Replaced by "
Bethory 0:6ad07c9019fd 133 "attach(callback(obj, method), type).")
Bethory 0:6ad07c9019fd 134 void attach(T *obj, void (*method)(T*), IrqType type=RxIrq) {
Bethory 0:6ad07c9019fd 135 attach(callback(obj, method), type);
Bethory 0:6ad07c9019fd 136 }
Bethory 0:6ad07c9019fd 137
Bethory 0:6ad07c9019fd 138 /** Generate a break condition on the serial line
Bethory 0:6ad07c9019fd 139 */
Bethory 0:6ad07c9019fd 140 void send_break();
Bethory 0:6ad07c9019fd 141
Bethory 0:6ad07c9019fd 142 protected:
Bethory 0:6ad07c9019fd 143
Bethory 0:6ad07c9019fd 144 /** Acquire exclusive access to this serial port
Bethory 0:6ad07c9019fd 145 */
Bethory 0:6ad07c9019fd 146 virtual void lock(void);
Bethory 0:6ad07c9019fd 147
Bethory 0:6ad07c9019fd 148 /** Release exclusive access to this serial port
Bethory 0:6ad07c9019fd 149 */
Bethory 0:6ad07c9019fd 150 virtual void unlock(void);
Bethory 0:6ad07c9019fd 151
Bethory 0:6ad07c9019fd 152 public:
Bethory 0:6ad07c9019fd 153
Bethory 0:6ad07c9019fd 154 #if DEVICE_SERIAL_FC
Bethory 0:6ad07c9019fd 155 /** Set the flow control type on the serial port
Bethory 0:6ad07c9019fd 156 *
Bethory 0:6ad07c9019fd 157 * @param type the flow control type (Disabled, RTS, CTS, RTSCTS)
Bethory 0:6ad07c9019fd 158 * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS)
Bethory 0:6ad07c9019fd 159 * @param flow2 the second flow control pin (CTS for RTSCTS)
Bethory 0:6ad07c9019fd 160 */
Bethory 0:6ad07c9019fd 161 void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC);
Bethory 0:6ad07c9019fd 162 #endif
Bethory 0:6ad07c9019fd 163
Bethory 0:6ad07c9019fd 164 static void _irq_handler(uint32_t id, SerialIrq irq_type);
Bethory 0:6ad07c9019fd 165
Bethory 0:6ad07c9019fd 166 #if DEVICE_SERIAL_ASYNCH
Bethory 0:6ad07c9019fd 167
Bethory 0:6ad07c9019fd 168 /** Begin asynchronous write using 8bit buffer. The completition invokes registered TX event callback
Bethory 0:6ad07c9019fd 169 *
Bethory 0:6ad07c9019fd 170 * This function locks the deep sleep until any event has occurred
Bethory 0:6ad07c9019fd 171 *
Bethory 0:6ad07c9019fd 172 * @param buffer The buffer where received data will be stored
Bethory 0:6ad07c9019fd 173 * @param length The buffer length in bytes
Bethory 0:6ad07c9019fd 174 * @param callback The event callback function
Bethory 0:6ad07c9019fd 175 * @param event The logical OR of TX events
Bethory 0:6ad07c9019fd 176 */
Bethory 0:6ad07c9019fd 177 int write(const uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
Bethory 0:6ad07c9019fd 178
Bethory 0:6ad07c9019fd 179 /** Begin asynchronous write using 16bit buffer. The completition invokes registered TX event callback
Bethory 0:6ad07c9019fd 180 *
Bethory 0:6ad07c9019fd 181 * This function locks the deep sleep until any event has occurred
Bethory 0:6ad07c9019fd 182 *
Bethory 0:6ad07c9019fd 183 * @param buffer The buffer where received data will be stored
Bethory 0:6ad07c9019fd 184 * @param length The buffer length in bytes
Bethory 0:6ad07c9019fd 185 * @param callback The event callback function
Bethory 0:6ad07c9019fd 186 * @param event The logical OR of TX events
Bethory 0:6ad07c9019fd 187 */
Bethory 0:6ad07c9019fd 188 int write(const uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
Bethory 0:6ad07c9019fd 189
Bethory 0:6ad07c9019fd 190 /** Abort the on-going write transfer
Bethory 0:6ad07c9019fd 191 */
Bethory 0:6ad07c9019fd 192 void abort_write();
Bethory 0:6ad07c9019fd 193
Bethory 0:6ad07c9019fd 194 /** Begin asynchronous reading using 8bit buffer. The completition invokes registred RX event callback.
Bethory 0:6ad07c9019fd 195 *
Bethory 0:6ad07c9019fd 196 * This function locks the deep sleep until any event has occurred
Bethory 0:6ad07c9019fd 197 *
Bethory 0:6ad07c9019fd 198 * @param buffer The buffer where received data will be stored
Bethory 0:6ad07c9019fd 199 * @param length The buffer length in bytes
Bethory 0:6ad07c9019fd 200 * @param callback The event callback function
Bethory 0:6ad07c9019fd 201 * @param event The logical OR of RX events
Bethory 0:6ad07c9019fd 202 * @param char_match The matching character
Bethory 0:6ad07c9019fd 203 */
Bethory 0:6ad07c9019fd 204 int read(uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_RX_COMPLETE, unsigned char char_match = SERIAL_RESERVED_CHAR_MATCH);
Bethory 0:6ad07c9019fd 205
Bethory 0:6ad07c9019fd 206 /** Begin asynchronous reading using 16bit buffer. The completition invokes registred RX event callback.
Bethory 0:6ad07c9019fd 207 *
Bethory 0:6ad07c9019fd 208 * This function locks the deep sleep until any event has occurred
Bethory 0:6ad07c9019fd 209 *
Bethory 0:6ad07c9019fd 210 * @param buffer The buffer where received data will be stored
Bethory 0:6ad07c9019fd 211 * @param length The buffer length in bytes
Bethory 0:6ad07c9019fd 212 * @param callback The event callback function
Bethory 0:6ad07c9019fd 213 * @param event The logical OR of RX events
Bethory 0:6ad07c9019fd 214 * @param char_match The matching character
Bethory 0:6ad07c9019fd 215 */
Bethory 0:6ad07c9019fd 216 int read(uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_RX_COMPLETE, unsigned char char_match = SERIAL_RESERVED_CHAR_MATCH);
Bethory 0:6ad07c9019fd 217
Bethory 0:6ad07c9019fd 218 /** Abort the on-going read transfer
Bethory 0:6ad07c9019fd 219 */
Bethory 0:6ad07c9019fd 220 void abort_read();
Bethory 0:6ad07c9019fd 221
Bethory 0:6ad07c9019fd 222 /** Configure DMA usage suggestion for non-blocking TX transfers
Bethory 0:6ad07c9019fd 223 *
Bethory 0:6ad07c9019fd 224 * @param usage The usage DMA hint for peripheral
Bethory 0:6ad07c9019fd 225 * @return Zero if the usage was set, -1 if a transaction is on-going
Bethory 0:6ad07c9019fd 226 */
Bethory 0:6ad07c9019fd 227 int set_dma_usage_tx(DMAUsage usage);
Bethory 0:6ad07c9019fd 228
Bethory 0:6ad07c9019fd 229 /** Configure DMA usage suggestion for non-blocking RX transfers
Bethory 0:6ad07c9019fd 230 *
Bethory 0:6ad07c9019fd 231 * @param usage The usage DMA hint for peripheral
Bethory 0:6ad07c9019fd 232 * @return Zero if the usage was set, -1 if a transaction is on-going
Bethory 0:6ad07c9019fd 233 */
Bethory 0:6ad07c9019fd 234 int set_dma_usage_rx(DMAUsage usage);
Bethory 0:6ad07c9019fd 235
Bethory 0:6ad07c9019fd 236 protected:
Bethory 0:6ad07c9019fd 237 void start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match);
Bethory 0:6ad07c9019fd 238 void start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event);
Bethory 0:6ad07c9019fd 239 void interrupt_handler_asynch(void);
Bethory 0:6ad07c9019fd 240 #endif
Bethory 0:6ad07c9019fd 241
Bethory 0:6ad07c9019fd 242 protected:
Bethory 0:6ad07c9019fd 243 SerialBase(PinName tx, PinName rx, int baud);
Bethory 0:6ad07c9019fd 244 virtual ~SerialBase();
Bethory 0:6ad07c9019fd 245
Bethory 0:6ad07c9019fd 246 int _base_getc();
Bethory 0:6ad07c9019fd 247 int _base_putc(int c);
Bethory 0:6ad07c9019fd 248
Bethory 0:6ad07c9019fd 249 #if DEVICE_SERIAL_ASYNCH
Bethory 0:6ad07c9019fd 250 CThunk<SerialBase> _thunk_irq;
Bethory 0:6ad07c9019fd 251 DMAUsage _tx_usage;
Bethory 0:6ad07c9019fd 252 DMAUsage _rx_usage;
Bethory 0:6ad07c9019fd 253 event_callback_t _tx_callback;
Bethory 0:6ad07c9019fd 254 event_callback_t _rx_callback;
Bethory 0:6ad07c9019fd 255 #endif
Bethory 0:6ad07c9019fd 256
Bethory 0:6ad07c9019fd 257 serial_t _serial;
Bethory 0:6ad07c9019fd 258 Callback<void()> _irq[IrqCnt];
Bethory 0:6ad07c9019fd 259 int _baud;
Bethory 0:6ad07c9019fd 260
Bethory 0:6ad07c9019fd 261 };
Bethory 0:6ad07c9019fd 262
Bethory 0:6ad07c9019fd 263 } // namespace mbed
Bethory 0:6ad07c9019fd 264
Bethory 0:6ad07c9019fd 265 #endif
Bethory 0:6ad07c9019fd 266
Bethory 0:6ad07c9019fd 267 #endif