Elijah Orr / mbed-renbed

Fork of the official mbed C/C SDK provides the software platform and libraries to build your applications for RenBED.

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SerialBase.h@121:672067c3ada4, 2016-04-14 (annotated)

Committer:
elijahorr
Date:
Thu Apr 14 07:28:54 2016 +0000
Revision:
121:672067c3ada4
Parent:
102:da0ca467f8b5 
.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 68:f37f3b9c9f0b 1 /* mbed Microcontroller Library
bogdanm 68:f37f3b9c9f0b 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 68:f37f3b9c9f0b 3 *
bogdanm 68:f37f3b9c9f0b 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 68:f37f3b9c9f0b 5 * you may not use this file except in compliance with the License.
bogdanm 68:f37f3b9c9f0b 6 * You may obtain a copy of the License at
bogdanm 68:f37f3b9c9f0b 7 *
bogdanm 68:f37f3b9c9f0b 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 68:f37f3b9c9f0b 9 *
bogdanm 68:f37f3b9c9f0b 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 68:f37f3b9c9f0b 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 68:f37f3b9c9f0b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 68:f37f3b9c9f0b 13 * See the License for the specific language governing permissions and
bogdanm 68:f37f3b9c9f0b 14 * limitations under the License.
bogdanm 68:f37f3b9c9f0b 15 */
bogdanm 68:f37f3b9c9f0b 16 #ifndef MBED_SERIALBASE_H
bogdanm 68:f37f3b9c9f0b 17 #define MBED_SERIALBASE_H
bogdanm 68:f37f3b9c9f0b 18
bogdanm 68:f37f3b9c9f0b 19 #include "platform.h"
bogdanm 68:f37f3b9c9f0b 20
bogdanm 68:f37f3b9c9f0b 21 #if DEVICE_SERIAL
bogdanm 68:f37f3b9c9f0b 22
bogdanm 68:f37f3b9c9f0b 23 #include "Stream.h"
bogdanm 68:f37f3b9c9f0b 24 #include "FunctionPointer.h"
bogdanm 68:f37f3b9c9f0b 25 #include "serial_api.h"
bogdanm 68:f37f3b9c9f0b 26
Kojto 98:8ab26030e058 27 #if DEVICE_SERIAL_ASYNCH
Kojto 98:8ab26030e058 28 #include "CThunk.h"
Kojto 98:8ab26030e058 29 #include "dma_api.h"
Kojto 98:8ab26030e058 30 #endif
Kojto 98:8ab26030e058 31
bogdanm 68:f37f3b9c9f0b 32 namespace mbed {
bogdanm 68:f37f3b9c9f0b 33
bogdanm 68:f37f3b9c9f0b 34 /** A base class for serial port implementations
bogdanm 68:f37f3b9c9f0b 35 * Can't be instantiated directly (use Serial or RawSerial)
bogdanm 68:f37f3b9c9f0b 36 */
bogdanm 68:f37f3b9c9f0b 37 class SerialBase {
bogdanm 68:f37f3b9c9f0b 38
bogdanm 68:f37f3b9c9f0b 39 public:
bogdanm 68:f37f3b9c9f0b 40 /** Set the baud rate of the serial port
bogdanm 68:f37f3b9c9f0b 41 *
bogdanm 68:f37f3b9c9f0b 42 * @param baudrate The baudrate of the serial port (default = 9600).
bogdanm 68:f37f3b9c9f0b 43 */
bogdanm 68:f37f3b9c9f0b 44 void baud(int baudrate);
bogdanm 68:f37f3b9c9f0b 45
bogdanm 68:f37f3b9c9f0b 46 enum Parity {
bogdanm 68:f37f3b9c9f0b 47 None = 0,
bogdanm 68:f37f3b9c9f0b 48 Odd,
bogdanm 68:f37f3b9c9f0b 49 Even,
bogdanm 68:f37f3b9c9f0b 50 Forced1,
bogdanm 68:f37f3b9c9f0b 51 Forced0
bogdanm 68:f37f3b9c9f0b 52 };
bogdanm 68:f37f3b9c9f0b 53
bogdanm 68:f37f3b9c9f0b 54 enum IrqType {
bogdanm 68:f37f3b9c9f0b 55 RxIrq = 0,
bogdanm 68:f37f3b9c9f0b 56 TxIrq
bogdanm 68:f37f3b9c9f0b 57 };
bogdanm 68:f37f3b9c9f0b 58
bogdanm 75:dc225afb6914 59 enum Flow {
bogdanm 75:dc225afb6914 60 Disabled = 0,
bogdanm 75:dc225afb6914 61 RTS,
bogdanm 75:dc225afb6914 62 CTS,
bogdanm 75:dc225afb6914 63 RTSCTS
bogdanm 75:dc225afb6914 64 };
bogdanm 75:dc225afb6914 65
bogdanm 68:f37f3b9c9f0b 66 /** Set the transmission format used by the serial port
bogdanm 68:f37f3b9c9f0b 67 *
bogdanm 68:f37f3b9c9f0b 68 * @param bits The number of bits in a word (5-8; default = 8)
bogdanm 68:f37f3b9c9f0b 69 * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None)
bogdanm 68:f37f3b9c9f0b 70 * @param stop The number of stop bits (1 or 2; default = 1)
bogdanm 68:f37f3b9c9f0b 71 */
bogdanm 68:f37f3b9c9f0b 72 void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1);
bogdanm 68:f37f3b9c9f0b 73
bogdanm 68:f37f3b9c9f0b 74 /** Determine if there is a character available to read
bogdanm 68:f37f3b9c9f0b 75 *
bogdanm 68:f37f3b9c9f0b 76 * @returns
bogdanm 68:f37f3b9c9f0b 77 * 1 if there is a character available to read,
bogdanm 68:f37f3b9c9f0b 78 * 0 otherwise
bogdanm 68:f37f3b9c9f0b 79 */
bogdanm 68:f37f3b9c9f0b 80 int readable();
bogdanm 68:f37f3b9c9f0b 81
bogdanm 68:f37f3b9c9f0b 82 /** Determine if there is space available to write a character
bogdanm 68:f37f3b9c9f0b 83 *
bogdanm 68:f37f3b9c9f0b 84 * @returns
bogdanm 68:f37f3b9c9f0b 85 * 1 if there is space to write a character,
bogdanm 68:f37f3b9c9f0b 86 * 0 otherwise
bogdanm 68:f37f3b9c9f0b 87 */
bogdanm 68:f37f3b9c9f0b 88 int writeable();
bogdanm 68:f37f3b9c9f0b 89
bogdanm 68:f37f3b9c9f0b 90 /** Attach a function to call whenever a serial interrupt is generated
bogdanm 68:f37f3b9c9f0b 91 *
bogdanm 68:f37f3b9c9f0b 92 * @param fptr A pointer to a void function, or 0 to set as none
bogdanm 68:f37f3b9c9f0b 93 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 68:f37f3b9c9f0b 94 */
bogdanm 68:f37f3b9c9f0b 95 void attach(void (*fptr)(void), IrqType type=RxIrq);
bogdanm 68:f37f3b9c9f0b 96
bogdanm 68:f37f3b9c9f0b 97 /** Attach a member function to call whenever a serial interrupt is generated
bogdanm 68:f37f3b9c9f0b 98 *
bogdanm 68:f37f3b9c9f0b 99 * @param tptr pointer to the object to call the member function on
bogdanm 68:f37f3b9c9f0b 100 * @param mptr pointer to the member function to be called
bogdanm 68:f37f3b9c9f0b 101 * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
bogdanm 68:f37f3b9c9f0b 102 */
bogdanm 68:f37f3b9c9f0b 103 template<typename T>
bogdanm 68:f37f3b9c9f0b 104 void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
bogdanm 68:f37f3b9c9f0b 105 if((mptr != NULL) && (tptr != NULL)) {
bogdanm 68:f37f3b9c9f0b 106 _irq[type].attach(tptr, mptr);
bogdanm 68:f37f3b9c9f0b 107 serial_irq_set(&_serial, (SerialIrq)type, 1);
Kojto 99:dbbf35b96557 108 } else {
Kojto 99:dbbf35b96557 109 serial_irq_set(&_serial, (SerialIrq)type, 0);
bogdanm 68:f37f3b9c9f0b 110 }
bogdanm 68:f37f3b9c9f0b 111 }
bogdanm 68:f37f3b9c9f0b 112
bogdanm 68:f37f3b9c9f0b 113 /** Generate a break condition on the serial line
bogdanm 68:f37f3b9c9f0b 114 */
bogdanm 68:f37f3b9c9f0b 115 void send_break();
bogdanm 85:024bf7f99721 116
bogdanm 75:dc225afb6914 117 #if DEVICE_SERIAL_FC
bogdanm 75:dc225afb6914 118 /** Set the flow control type on the serial port
bogdanm 75:dc225afb6914 119 *
bogdanm 85:024bf7f99721 120 * @param type the flow control type (Disabled, RTS, CTS, RTSCTS)
bogdanm 75:dc225afb6914 121 * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS)
bogdanm 75:dc225afb6914 122 * @param flow2 the second flow control pin (CTS for RTSCTS)
bogdanm 75:dc225afb6914 123 */
bogdanm 75:dc225afb6914 124 void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC);
bogdanm 75:dc225afb6914 125 #endif
bogdanm 68:f37f3b9c9f0b 126
bogdanm 68:f37f3b9c9f0b 127 static void _irq_handler(uint32_t id, SerialIrq irq_type);
bogdanm 68:f37f3b9c9f0b 128
Kojto 98:8ab26030e058 129 #if DEVICE_SERIAL_ASYNCH
Kojto 98:8ab26030e058 130
Kojto 98:8ab26030e058 131 /** Begin asynchronous write using 8bit buffer. The completition invokes registered TX event callback
Kojto 98:8ab26030e058 132 *
Kojto 98:8ab26030e058 133 * @param buffer The buffer where received data will be stored
Kojto 102:da0ca467f8b5 134 * @param length The buffer length in bytes
Kojto 98:8ab26030e058 135 * @param callback The event callback function
Kojto 98:8ab26030e058 136 * @param event The logical OR of TX events
Kojto 98:8ab26030e058 137 */
Kojto 102:da0ca467f8b5 138 int write(const uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
Kojto 98:8ab26030e058 139
Kojto 98:8ab26030e058 140 /** Begin asynchronous write using 16bit buffer. The completition invokes registered TX event callback
Kojto 98:8ab26030e058 141 *
Kojto 98:8ab26030e058 142 * @param buffer The buffer where received data will be stored
Kojto 102:da0ca467f8b5 143 * @param length The buffer length in bytes
Kojto 98:8ab26030e058 144 * @param callback The event callback function
Kojto 98:8ab26030e058 145 * @param event The logical OR of TX events
Kojto 98:8ab26030e058 146 */
Kojto 102:da0ca467f8b5 147 int write(const uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE);
Kojto 98:8ab26030e058 148
Kojto 98:8ab26030e058 149 /** Abort the on-going write transfer
Kojto 98:8ab26030e058 150 */
Kojto 98:8ab26030e058 151 void abort_write();
Kojto 98:8ab26030e058 152
Kojto 98:8ab26030e058 153 /** Begin asynchronous reading using 8bit buffer. The completition invokes registred RX event callback.
Kojto 98:8ab26030e058 154 *
Kojto 98:8ab26030e058 155 * @param buffer The buffer where received data will be stored
Kojto 102:da0ca467f8b5 156 * @param length The buffer length in bytes
Kojto 98:8ab26030e058 157 * @param callback The event callback function
Kojto 98:8ab26030e058 158 * @param event The logical OR of RX events
Kojto 98:8ab26030e058 159 * @param char_match The matching character
Kojto 98:8ab26030e058 160 */
Kojto 98:8ab26030e058 161 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);
Kojto 98:8ab26030e058 162
Kojto 98:8ab26030e058 163 /** Begin asynchronous reading using 16bit buffer. The completition invokes registred RX event callback.
Kojto 98:8ab26030e058 164 *
Kojto 98:8ab26030e058 165 * @param buffer The buffer where received data will be stored
Kojto 102:da0ca467f8b5 166 * @param length The buffer length in bytes
Kojto 98:8ab26030e058 167 * @param callback The event callback function
Kojto 98:8ab26030e058 168 * @param event The logical OR of RX events
Kojto 98:8ab26030e058 169 * @param char_match The matching character
Kojto 98:8ab26030e058 170 */
Kojto 98:8ab26030e058 171 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);
Kojto 98:8ab26030e058 172
Kojto 98:8ab26030e058 173 /** Abort the on-going read transfer
Kojto 98:8ab26030e058 174 */
Kojto 98:8ab26030e058 175 void abort_read();
Kojto 98:8ab26030e058 176
Kojto 98:8ab26030e058 177 /** Configure DMA usage suggestion for non-blocking TX transfers
Kojto 98:8ab26030e058 178 *
Kojto 98:8ab26030e058 179 * @param usage The usage DMA hint for peripheral
Kojto 98:8ab26030e058 180 * @return Zero if the usage was set, -1 if a transaction is on-going
Kojto 98:8ab26030e058 181 */
Kojto 98:8ab26030e058 182 int set_dma_usage_tx(DMAUsage usage);
Kojto 98:8ab26030e058 183
Kojto 98:8ab26030e058 184 /** Configure DMA usage suggestion for non-blocking RX transfers
Kojto 98:8ab26030e058 185 *
Kojto 98:8ab26030e058 186 * @param usage The usage DMA hint for peripheral
Kojto 98:8ab26030e058 187 * @return Zero if the usage was set, -1 if a transaction is on-going
Kojto 98:8ab26030e058 188 */
Kojto 98:8ab26030e058 189 int set_dma_usage_rx(DMAUsage usage);
Kojto 98:8ab26030e058 190
Kojto 98:8ab26030e058 191 protected:
Kojto 98:8ab26030e058 192 void start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match);
Kojto 102:da0ca467f8b5 193 void start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event);
Kojto 98:8ab26030e058 194 void interrupt_handler_asynch(void);
Kojto 98:8ab26030e058 195 #endif
Kojto 98:8ab26030e058 196
bogdanm 68:f37f3b9c9f0b 197 protected:
bogdanm 68:f37f3b9c9f0b 198 SerialBase(PinName tx, PinName rx);
bogdanm 85:024bf7f99721 199 virtual ~SerialBase() {
bogdanm 85:024bf7f99721 200 }
bogdanm 85:024bf7f99721 201
bogdanm 68:f37f3b9c9f0b 202 int _base_getc();
bogdanm 68:f37f3b9c9f0b 203 int _base_putc(int c);
bogdanm 68:f37f3b9c9f0b 204
Kojto 98:8ab26030e058 205 #if DEVICE_SERIAL_ASYNCH
Kojto 98:8ab26030e058 206 CThunk<SerialBase> _thunk_irq;
Kojto 98:8ab26030e058 207 event_callback_t _tx_callback;
Kojto 98:8ab26030e058 208 event_callback_t _rx_callback;
Kojto 98:8ab26030e058 209 DMAUsage _tx_usage;
Kojto 98:8ab26030e058 210 DMAUsage _rx_usage;
Kojto 98:8ab26030e058 211 #endif
Kojto 98:8ab26030e058 212
bogdanm 68:f37f3b9c9f0b 213 serial_t _serial;
bogdanm 68:f37f3b9c9f0b 214 FunctionPointer _irq[2];
bogdanm 68:f37f3b9c9f0b 215 int _baud;
Kojto 98:8ab26030e058 216
bogdanm 68:f37f3b9c9f0b 217 };
bogdanm 68:f37f3b9c9f0b 218
bogdanm 68:f37f3b9c9f0b 219 } // namespace mbed
bogdanm 68:f37f3b9c9f0b 220
bogdanm 68:f37f3b9c9f0b 221 #endif
bogdanm 68:f37f3b9c9f0b 222
bogdanm 68:f37f3b9c9f0b 223 #endif