Amit Gandhi / mbed-dev

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drivers/SerialBase.h@168:e84263d55307, 2017-06-21 (annotated)

Committer:
AnnaBridge
Date:
Wed Jun 21 17:46:44 2017 +0100
Revision:
168:e84263d55307
Parent:
160:d5399cc887bb
Child:
169:9672193075cf
This updates the lib to the mbed lib v 145

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16 #ifndef MBED_SERIALBASE_H
<> 149:156823d33999 17 #define MBED_SERIALBASE_H
<> 149:156823d33999 18
<> 149:156823d33999 19 #include "platform/platform.h"
<> 149:156823d33999 20
AnnaBridge 168:e84263d55307 21 #if defined (DEVICE_SERIAL) || defined(DOXYGEN_ONLY)
<> 149:156823d33999 22
<> 149:156823d33999 23 #include "Callback.h"
<> 149:156823d33999 24 #include "serial_api.h"
<> 160:d5399cc887bb 25 #include "mbed_toolchain.h"
<> 149:156823d33999 26
<> 149:156823d33999 27 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 28 #include "CThunk.h"
<> 149:156823d33999 29 #include "dma_api.h"
<> 149:156823d33999 30 #endif
<> 149:156823d33999 31
<> 149:156823d33999 32 namespace mbed {
<> 149:156823d33999 33 /** \addtogroup drivers */
<> 149:156823d33999 34
<> 149:156823d33999 35 /** A base class for serial port implementations
<> 149:156823d33999 36 * Can't be instantiated directly (use Serial or RawSerial)
<> 149:156823d33999 37 *
AnnaBridge 168:e84263d55307 38 * @note Synchronization level: Set by subclass
AnnaBridge 168:e84263d55307 39 * @ingroup drivers
<> 149:156823d33999 40 */
<> 149:156823d33999 41 class SerialBase {
<> 149:156823d33999 42
<> 149:156823d33999 43 public:
<> 149:156823d33999 44 /** Set the baud rate of the serial port
<> 149:156823d33999 45 *
<> 149:156823d33999 46 * @param baudrate The baudrate of the serial port (default = 9600).
<> 149:156823d33999 47 */
<> 149:156823d33999 48 void baud(int baudrate);
<> 149:156823d33999 49
<> 149:156823d33999 50 enum Parity {
<> 149:156823d33999 51 None = 0,
<> 149:156823d33999 52 Odd,
<> 149:156823d33999 53 Even,
<> 149:156823d33999 54 Forced1,
<> 149:156823d33999 55 Forced0
<> 149:156823d33999 56 };
<> 149:156823d33999 57
<> 149:156823d33999 58 enum IrqType {
<> 149:156823d33999 59 RxIrq = 0,
<> 149:156823d33999 60 TxIrq,
<> 149:156823d33999 61
<> 149:156823d33999 62 IrqCnt
<> 149:156823d33999 63 };
<> 149:156823d33999 64
<> 149:156823d33999 65 enum Flow {
<> 149:156823d33999 66 Disabled = 0,
<> 149:156823d33999 67 RTS,
<> 149:156823d33999 68 CTS,
<> 149:156823d33999 69 RTSCTS
<> 149:156823d33999 70 };
<> 149:156823d33999 71
<> 149:156823d33999 72 /** Set the transmission format used by the serial port
<> 149:156823d33999 73 *
<> 149:156823d33999 74 * @param bits The number of bits in a word (5-8; default = 8)
<> 149:156823d33999 75 * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None)
AnnaBridge 168:e84263d55307 76 * @param stop_bits The number of stop bits (1 or 2; default = 1)
<> 149:156823d33999 77 */
<> 149:156823d33999 78 void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1);
<> 149:156823d33999 79
<> 149:156823d33999 80 /** Determine if there is a character available to read
<> 149:156823d33999 81 *
<> 149:156823d33999 82 * @returns
<> 149:156823d33999 83 * 1 if there is a character available to read,
<> 149:156823d33999 84 * 0 otherwise
<> 149:156823d33999 85 */
<> 149:156823d33999 86 int readable();
<> 149:156823d33999 87
<> 149:156823d33999 88 /** Determine if there is space available to write a character
<> 149:156823d33999 89 *
<> 149:156823d33999 90 * @returns
<> 149:156823d33999 91 * 1 if there is space to write a character,
<> 149:156823d33999 92 * 0 otherwise
<> 149:156823d33999 93 */
<> 149:156823d33999 94 int writeable();
<> 149:156823d33999 95
<> 149:156823d33999 96 /** Attach a function to call whenever a serial interrupt is generated
<> 149:156823d33999 97 *
<> 149:156823d33999 98 * @param func A pointer to a void function, or 0 to set as none
<> 149:156823d33999 99 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
<> 149:156823d33999 100 */
<> 149:156823d33999 101 void attach(Callback<void()> func, IrqType type=RxIrq);
<> 149:156823d33999 102
<> 149:156823d33999 103 /** Attach a member function to call whenever a serial interrupt is generated
<> 149:156823d33999 104 *
<> 149:156823d33999 105 * @param obj pointer to the object to call the member function on
<> 149:156823d33999 106 * @param method pointer to the member function to be called
<> 149:156823d33999 107 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
<> 149:156823d33999 108 * @deprecated
<> 149:156823d33999 109 * The attach function does not support cv-qualifiers. Replaced by
<> 149:156823d33999 110 * attach(callback(obj, method), type).
<> 149:156823d33999 111 */
<> 149:156823d33999 112 template<typename T>
<> 149:156823d33999 113 MBED_DEPRECATED_SINCE("mbed-os-5.1",
<> 149:156823d33999 114 "The attach function does not support cv-qualifiers. Replaced by "
<> 149:156823d33999 115 "attach(callback(obj, method), type).")
<> 149:156823d33999 116 void attach(T *obj, void (T::*method)(), IrqType type=RxIrq) {
<> 149:156823d33999 117 attach(callback(obj, method), type);
<> 149:156823d33999 118 }
<> 149:156823d33999 119
<> 149:156823d33999 120 /** Attach a member function to call whenever a serial interrupt is generated
<> 149:156823d33999 121 *
<> 149:156823d33999 122 * @param obj pointer to the object to call the member function on
<> 149:156823d33999 123 * @param method pointer to the member function to be called
<> 149:156823d33999 124 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
<> 149:156823d33999 125 * @deprecated
<> 149:156823d33999 126 * The attach function does not support cv-qualifiers. Replaced by
<> 149:156823d33999 127 * attach(callback(obj, method), type).
<> 149:156823d33999 128 */
<> 149:156823d33999 129 template<typename T>
<> 149:156823d33999 130 MBED_DEPRECATED_SINCE("mbed-os-5.1",
<> 149:156823d33999 131 "The attach function does not support cv-qualifiers. Replaced by "
<> 149:156823d33999 132 "attach(callback(obj, method), type).")
<> 149:156823d33999 133 void attach(T *obj, void (*method)(T*), IrqType type=RxIrq) {
<> 149:156823d33999 134 attach(callback(obj, method), type);
<> 149:156823d33999 135 }
<> 149:156823d33999 136
<> 149:156823d33999 137 /** Generate a break condition on the serial line
<> 149:156823d33999 138 */
<> 149:156823d33999 139 void send_break();
<> 149:156823d33999 140
<> 149:156823d33999 141 protected:
<> 149:156823d33999 142
<> 149:156823d33999 143 /** Acquire exclusive access to this serial port
<> 149:156823d33999 144 */
<> 149:156823d33999 145 virtual void lock(void);
<> 149:156823d33999 146
<> 149:156823d33999 147 /** Release exclusive access to this serial port
<> 149:156823d33999 148 */
<> 149:156823d33999 149 virtual void unlock(void);
<> 149:156823d33999 150
<> 149:156823d33999 151 public:
<> 149:156823d33999 152
<> 149:156823d33999 153 #if DEVICE_SERIAL_FC
<> 149:156823d33999 154 /** Set the flow control type on the serial port
<> 149:156823d33999 155 *
<> 149:156823d33999 156 * @param type the flow control type (Disabled, RTS, CTS, RTSCTS)
<> 149:156823d33999 157 * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS)
<> 149:156823d33999 158 * @param flow2 the second flow control pin (CTS for RTSCTS)
<> 149:156823d33999 159 */
<> 149:156823d33999 160 void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC);
<> 149:156823d33999 161 #endif
<> 149:156823d33999 162
<> 149:156823d33999 163 static void _irq_handler(uint32_t id, SerialIrq irq_type);
<> 149:156823d33999 164
<> 149:156823d33999 165 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 166
<> 149:156823d33999 167 /** Begin asynchronous write using 8bit buffer. The completition invokes registered TX event callback
<> 149:156823d33999 168 *
<> 149:156823d33999 169 * @param buffer The buffer where received data will be stored
<> 149:156823d33999 170 * @param length The buffer length in bytes
<> 149:156823d33999 171 * @param callback The event callback function
<> 149:156823d33999 172 * @param event The logical OR of TX events
<> 149:156823d33999 173 */
<> 149:156823d33999 174 int write(const uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
<> 149:156823d33999 175
<> 149:156823d33999 176 /** Begin asynchronous write using 16bit buffer. The completition invokes registered TX event callback
<> 149:156823d33999 177 *
<> 149:156823d33999 178 * @param buffer The buffer where received data will be stored
<> 149:156823d33999 179 * @param length The buffer length in bytes
<> 149:156823d33999 180 * @param callback The event callback function
<> 149:156823d33999 181 * @param event The logical OR of TX events
<> 149:156823d33999 182 */
<> 149:156823d33999 183 int write(const uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
<> 149:156823d33999 184
<> 149:156823d33999 185 /** Abort the on-going write transfer
<> 149:156823d33999 186 */
<> 149:156823d33999 187 void abort_write();
<> 149:156823d33999 188
<> 149:156823d33999 189 /** Begin asynchronous reading using 8bit buffer. The completition invokes registred RX event callback.
<> 149:156823d33999 190 *
<> 149:156823d33999 191 * @param buffer The buffer where received data will be stored
<> 149:156823d33999 192 * @param length The buffer length in bytes
<> 149:156823d33999 193 * @param callback The event callback function
<> 149:156823d33999 194 * @param event The logical OR of RX events
<> 149:156823d33999 195 * @param char_match The matching character
<> 149:156823d33999 196 */
<> 149:156823d33999 197 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);
<> 149:156823d33999 198
<> 149:156823d33999 199 /** Begin asynchronous reading using 16bit buffer. The completition invokes registred RX event callback.
<> 149:156823d33999 200 *
<> 149:156823d33999 201 * @param buffer The buffer where received data will be stored
<> 149:156823d33999 202 * @param length The buffer length in bytes
<> 149:156823d33999 203 * @param callback The event callback function
<> 149:156823d33999 204 * @param event The logical OR of RX events
<> 149:156823d33999 205 * @param char_match The matching character
<> 149:156823d33999 206 */
<> 149:156823d33999 207 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);
<> 149:156823d33999 208
<> 149:156823d33999 209 /** Abort the on-going read transfer
<> 149:156823d33999 210 */
<> 149:156823d33999 211 void abort_read();
<> 149:156823d33999 212
<> 149:156823d33999 213 /** Configure DMA usage suggestion for non-blocking TX transfers
<> 149:156823d33999 214 *
<> 149:156823d33999 215 * @param usage The usage DMA hint for peripheral
<> 149:156823d33999 216 * @return Zero if the usage was set, -1 if a transaction is on-going
<> 149:156823d33999 217 */
<> 149:156823d33999 218 int set_dma_usage_tx(DMAUsage usage);
<> 149:156823d33999 219
<> 149:156823d33999 220 /** Configure DMA usage suggestion for non-blocking RX transfers
<> 149:156823d33999 221 *
<> 149:156823d33999 222 * @param usage The usage DMA hint for peripheral
<> 149:156823d33999 223 * @return Zero if the usage was set, -1 if a transaction is on-going
<> 149:156823d33999 224 */
<> 149:156823d33999 225 int set_dma_usage_rx(DMAUsage usage);
<> 149:156823d33999 226
<> 149:156823d33999 227 protected:
<> 149:156823d33999 228 void start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match);
<> 149:156823d33999 229 void start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event);
<> 149:156823d33999 230 void interrupt_handler_asynch(void);
<> 149:156823d33999 231 #endif
<> 149:156823d33999 232
<> 149:156823d33999 233 protected:
<> 149:156823d33999 234 SerialBase(PinName tx, PinName rx, int baud);
<> 149:156823d33999 235 virtual ~SerialBase() {
<> 149:156823d33999 236 }
<> 149:156823d33999 237
<> 149:156823d33999 238 int _base_getc();
<> 149:156823d33999 239 int _base_putc(int c);
<> 149:156823d33999 240
<> 149:156823d33999 241 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 242 CThunk<SerialBase> _thunk_irq;
<> 149:156823d33999 243 event_callback_t _tx_callback;
<> 149:156823d33999 244 event_callback_t _rx_callback;
<> 149:156823d33999 245 DMAUsage _tx_usage;
<> 149:156823d33999 246 DMAUsage _rx_usage;
<> 149:156823d33999 247 #endif
<> 149:156823d33999 248
<> 149:156823d33999 249 serial_t _serial;
<> 149:156823d33999 250 Callback<void()> _irq[IrqCnt];
<> 149:156823d33999 251 int _baud;
<> 149:156823d33999 252
<> 149:156823d33999 253 };
<> 149:156823d33999 254
<> 149:156823d33999 255 } // namespace mbed
<> 149:156823d33999 256
<> 149:156823d33999 257 #endif
<> 149:156823d33999 258
<> 149:156823d33999 259 #endif