Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

drivers/SerialBase.h@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #ifndef MBED_SERIALBASE_H
elessair 0:f269e3021894 17 #define MBED_SERIALBASE_H
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19 #include "platform/platform.h"
elessair 0:f269e3021894 20
elessair 0:f269e3021894 21 #if DEVICE_SERIAL
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 #include "Stream.h"
elessair 0:f269e3021894 24 #include "Callback.h"
elessair 0:f269e3021894 25 #include "serial_api.h"
elessair 0:f269e3021894 26 #include "toolchain.h"
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 29 #include "CThunk.h"
elessair 0:f269e3021894 30 #include "dma_api.h"
elessair 0:f269e3021894 31 #endif
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 namespace mbed {
elessair 0:f269e3021894 34 /** \addtogroup drivers */
elessair 0:f269e3021894 35 /** @{*/
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 /** A base class for serial port implementations
elessair 0:f269e3021894 38 * Can't be instantiated directly (use Serial or RawSerial)
elessair 0:f269e3021894 39 *
elessair 0:f269e3021894 40 * @Note Synchronization level: Set by subclass
elessair 0:f269e3021894 41 */
elessair 0:f269e3021894 42 class SerialBase {
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 public:
elessair 0:f269e3021894 45 /** Set the baud rate of the serial port
elessair 0:f269e3021894 46 *
elessair 0:f269e3021894 47 * @param baudrate The baudrate of the serial port (default = 9600).
elessair 0:f269e3021894 48 */
elessair 0:f269e3021894 49 void baud(int baudrate);
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 enum Parity {
elessair 0:f269e3021894 52 None = 0,
elessair 0:f269e3021894 53 Odd,
elessair 0:f269e3021894 54 Even,
elessair 0:f269e3021894 55 Forced1,
elessair 0:f269e3021894 56 Forced0
elessair 0:f269e3021894 57 };
elessair 0:f269e3021894 58
elessair 0:f269e3021894 59 enum IrqType {
elessair 0:f269e3021894 60 RxIrq = 0,
elessair 0:f269e3021894 61 TxIrq,
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 IrqCnt
elessair 0:f269e3021894 64 };
elessair 0:f269e3021894 65
elessair 0:f269e3021894 66 enum Flow {
elessair 0:f269e3021894 67 Disabled = 0,
elessair 0:f269e3021894 68 RTS,
elessair 0:f269e3021894 69 CTS,
elessair 0:f269e3021894 70 RTSCTS
elessair 0:f269e3021894 71 };
elessair 0:f269e3021894 72
elessair 0:f269e3021894 73 /** Set the transmission format used by the serial port
elessair 0:f269e3021894 74 *
elessair 0:f269e3021894 75 * @param bits The number of bits in a word (5-8; default = 8)
elessair 0:f269e3021894 76 * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None)
elessair 0:f269e3021894 77 * @param stop The number of stop bits (1 or 2; default = 1)
elessair 0:f269e3021894 78 */
elessair 0:f269e3021894 79 void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1);
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 /** Determine if there is a character available to read
elessair 0:f269e3021894 82 *
elessair 0:f269e3021894 83 * @returns
elessair 0:f269e3021894 84 * 1 if there is a character available to read,
elessair 0:f269e3021894 85 * 0 otherwise
elessair 0:f269e3021894 86 */
elessair 0:f269e3021894 87 int readable();
elessair 0:f269e3021894 88
elessair 0:f269e3021894 89 /** Determine if there is space available to write a character
elessair 0:f269e3021894 90 *
elessair 0:f269e3021894 91 * @returns
elessair 0:f269e3021894 92 * 1 if there is space to write a character,
elessair 0:f269e3021894 93 * 0 otherwise
elessair 0:f269e3021894 94 */
elessair 0:f269e3021894 95 int writeable();
elessair 0:f269e3021894 96
elessair 0:f269e3021894 97 /** Attach a function to call whenever a serial interrupt is generated
elessair 0:f269e3021894 98 *
elessair 0:f269e3021894 99 * @param func A pointer to a void function, or 0 to set as none
elessair 0:f269e3021894 100 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
elessair 0:f269e3021894 101 */
elessair 0:f269e3021894 102 void attach(Callback<void()> func, IrqType type=RxIrq);
elessair 0:f269e3021894 103
elessair 0:f269e3021894 104 /** Attach a member function to call whenever a serial interrupt is generated
elessair 0:f269e3021894 105 *
elessair 0:f269e3021894 106 * @param obj pointer to the object to call the member function on
elessair 0:f269e3021894 107 * @param method pointer to the member function to be called
elessair 0:f269e3021894 108 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
elessair 0:f269e3021894 109 * @deprecated
elessair 0:f269e3021894 110 * The attach function does not support cv-qualifiers. Replaced by
elessair 0:f269e3021894 111 * attach(callback(obj, method), type).
elessair 0:f269e3021894 112 */
elessair 0:f269e3021894 113 template<typename T>
elessair 0:f269e3021894 114 MBED_DEPRECATED_SINCE("mbed-os-5.1",
elessair 0:f269e3021894 115 "The attach function does not support cv-qualifiers. Replaced by "
elessair 0:f269e3021894 116 "attach(callback(obj, method), type).")
elessair 0:f269e3021894 117 void attach(T *obj, void (T::*method)(), IrqType type=RxIrq) {
elessair 0:f269e3021894 118 attach(callback(obj, method), type);
elessair 0:f269e3021894 119 }
elessair 0:f269e3021894 120
elessair 0:f269e3021894 121 /** Attach a member function to call whenever a serial interrupt is generated
elessair 0:f269e3021894 122 *
elessair 0:f269e3021894 123 * @param obj pointer to the object to call the member function on
elessair 0:f269e3021894 124 * @param method pointer to the member function to be called
elessair 0:f269e3021894 125 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
elessair 0:f269e3021894 126 * @deprecated
elessair 0:f269e3021894 127 * The attach function does not support cv-qualifiers. Replaced by
elessair 0:f269e3021894 128 * attach(callback(obj, method), type).
elessair 0:f269e3021894 129 */
elessair 0:f269e3021894 130 template<typename T>
elessair 0:f269e3021894 131 MBED_DEPRECATED_SINCE("mbed-os-5.1",
elessair 0:f269e3021894 132 "The attach function does not support cv-qualifiers. Replaced by "
elessair 0:f269e3021894 133 "attach(callback(obj, method), type).")
elessair 0:f269e3021894 134 void attach(T *obj, void (*method)(T*), IrqType type=RxIrq) {
elessair 0:f269e3021894 135 attach(callback(obj, method), type);
elessair 0:f269e3021894 136 }
elessair 0:f269e3021894 137
elessair 0:f269e3021894 138 /** Generate a break condition on the serial line
elessair 0:f269e3021894 139 */
elessair 0:f269e3021894 140 void send_break();
elessair 0:f269e3021894 141
elessair 0:f269e3021894 142 protected:
elessair 0:f269e3021894 143
elessair 0:f269e3021894 144 /** Acquire exclusive access to this serial port
elessair 0:f269e3021894 145 */
elessair 0:f269e3021894 146 virtual void lock(void);
elessair 0:f269e3021894 147
elessair 0:f269e3021894 148 /** Release exclusive access to this serial port
elessair 0:f269e3021894 149 */
elessair 0:f269e3021894 150 virtual void unlock(void);
elessair 0:f269e3021894 151
elessair 0:f269e3021894 152 public:
elessair 0:f269e3021894 153
elessair 0:f269e3021894 154 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 155 /** Set the flow control type on the serial port
elessair 0:f269e3021894 156 *
elessair 0:f269e3021894 157 * @param type the flow control type (Disabled, RTS, CTS, RTSCTS)
elessair 0:f269e3021894 158 * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS)
elessair 0:f269e3021894 159 * @param flow2 the second flow control pin (CTS for RTSCTS)
elessair 0:f269e3021894 160 */
elessair 0:f269e3021894 161 void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC);
elessair 0:f269e3021894 162 #endif
elessair 0:f269e3021894 163
elessair 0:f269e3021894 164 static void _irq_handler(uint32_t id, SerialIrq irq_type);
elessair 0:f269e3021894 165
elessair 0:f269e3021894 166 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 167
elessair 0:f269e3021894 168 /** Begin asynchronous write using 8bit buffer. The completition invokes registered TX event callback
elessair 0:f269e3021894 169 *
elessair 0:f269e3021894 170 * @param buffer The buffer where received data will be stored
elessair 0:f269e3021894 171 * @param length The buffer length in bytes
elessair 0:f269e3021894 172 * @param callback The event callback function
elessair 0:f269e3021894 173 * @param event The logical OR of TX events
elessair 0:f269e3021894 174 */
elessair 0:f269e3021894 175 int write(const uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
elessair 0:f269e3021894 176
elessair 0:f269e3021894 177 /** Begin asynchronous write using 16bit buffer. The completition invokes registered TX event callback
elessair 0:f269e3021894 178 *
elessair 0:f269e3021894 179 * @param buffer The buffer where received data will be stored
elessair 0:f269e3021894 180 * @param length The buffer length in bytes
elessair 0:f269e3021894 181 * @param callback The event callback function
elessair 0:f269e3021894 182 * @param event The logical OR of TX events
elessair 0:f269e3021894 183 */
elessair 0:f269e3021894 184 int write(const uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
elessair 0:f269e3021894 185
elessair 0:f269e3021894 186 /** Abort the on-going write transfer
elessair 0:f269e3021894 187 */
elessair 0:f269e3021894 188 void abort_write();
elessair 0:f269e3021894 189
elessair 0:f269e3021894 190 /** Begin asynchronous reading using 8bit buffer. The completition invokes registred RX event callback.
elessair 0:f269e3021894 191 *
elessair 0:f269e3021894 192 * @param buffer The buffer where received data will be stored
elessair 0:f269e3021894 193 * @param length The buffer length in bytes
elessair 0:f269e3021894 194 * @param callback The event callback function
elessair 0:f269e3021894 195 * @param event The logical OR of RX events
elessair 0:f269e3021894 196 * @param char_match The matching character
elessair 0:f269e3021894 197 */
elessair 0:f269e3021894 198 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);
elessair 0:f269e3021894 199
elessair 0:f269e3021894 200 /** Begin asynchronous reading using 16bit buffer. The completition invokes registred RX event callback.
elessair 0:f269e3021894 201 *
elessair 0:f269e3021894 202 * @param buffer The buffer where received data will be stored
elessair 0:f269e3021894 203 * @param length The buffer length in bytes
elessair 0:f269e3021894 204 * @param callback The event callback function
elessair 0:f269e3021894 205 * @param event The logical OR of RX events
elessair 0:f269e3021894 206 * @param char_match The matching character
elessair 0:f269e3021894 207 */
elessair 0:f269e3021894 208 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);
elessair 0:f269e3021894 209
elessair 0:f269e3021894 210 /** Abort the on-going read transfer
elessair 0:f269e3021894 211 */
elessair 0:f269e3021894 212 void abort_read();
elessair 0:f269e3021894 213
elessair 0:f269e3021894 214 /** Configure DMA usage suggestion for non-blocking TX transfers
elessair 0:f269e3021894 215 *
elessair 0:f269e3021894 216 * @param usage The usage DMA hint for peripheral
elessair 0:f269e3021894 217 * @return Zero if the usage was set, -1 if a transaction is on-going
elessair 0:f269e3021894 218 */
elessair 0:f269e3021894 219 int set_dma_usage_tx(DMAUsage usage);
elessair 0:f269e3021894 220
elessair 0:f269e3021894 221 /** Configure DMA usage suggestion for non-blocking RX transfers
elessair 0:f269e3021894 222 *
elessair 0:f269e3021894 223 * @param usage The usage DMA hint for peripheral
elessair 0:f269e3021894 224 * @return Zero if the usage was set, -1 if a transaction is on-going
elessair 0:f269e3021894 225 */
elessair 0:f269e3021894 226 int set_dma_usage_rx(DMAUsage usage);
elessair 0:f269e3021894 227
elessair 0:f269e3021894 228 protected:
elessair 0:f269e3021894 229 void start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match);
elessair 0:f269e3021894 230 void start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event);
elessair 0:f269e3021894 231 void interrupt_handler_asynch(void);
elessair 0:f269e3021894 232 #endif
elessair 0:f269e3021894 233
elessair 0:f269e3021894 234 protected:
elessair 0:f269e3021894 235 SerialBase(PinName tx, PinName rx, int baud);
elessair 0:f269e3021894 236 virtual ~SerialBase() {
elessair 0:f269e3021894 237 }
elessair 0:f269e3021894 238
elessair 0:f269e3021894 239 int _base_getc();
elessair 0:f269e3021894 240 int _base_putc(int c);
elessair 0:f269e3021894 241
elessair 0:f269e3021894 242 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 243 CThunk<SerialBase> _thunk_irq;
elessair 0:f269e3021894 244 event_callback_t _tx_callback;
elessair 0:f269e3021894 245 event_callback_t _rx_callback;
elessair 0:f269e3021894 246 DMAUsage _tx_usage;
elessair 0:f269e3021894 247 DMAUsage _rx_usage;
elessair 0:f269e3021894 248 #endif
elessair 0:f269e3021894 249
elessair 0:f269e3021894 250 serial_t _serial;
elessair 0:f269e3021894 251 Callback<void()> _irq[IrqCnt];
elessair 0:f269e3021894 252 int _baud;
elessair 0:f269e3021894 253
elessair 0:f269e3021894 254 };
elessair 0:f269e3021894 255
elessair 0:f269e3021894 256 } // namespace mbed
elessair 0:f269e3021894 257
elessair 0:f269e3021894 258 #endif
elessair 0:f269e3021894 259
elessair 0:f269e3021894 260 #endif
elessair 0:f269e3021894 261
elessair 0:f269e3021894 262 /** @}*/