Marek Trojan / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

hal/serial_api.h@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #ifndef MBED_SERIAL_API_H
bogdanm 0:9b334a45a8ff 17 #define MBED_SERIAL_API_H
bogdanm 0:9b334a45a8ff 18
bogdanm 0:9b334a45a8ff 19 #include "device.h"
bogdanm 0:9b334a45a8ff 20 #include "buffer.h"
bogdanm 0:9b334a45a8ff 21 #include "dma_api.h"
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 #if DEVICE_SERIAL
bogdanm 0:9b334a45a8ff 24
bogdanm 0:9b334a45a8ff 25 #define SERIAL_EVENT_TX_SHIFT (2)
bogdanm 0:9b334a45a8ff 26 #define SERIAL_EVENT_RX_SHIFT (8)
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 #define SERIAL_EVENT_TX_MASK (0x00FC)
bogdanm 0:9b334a45a8ff 29 #define SERIAL_EVENT_RX_MASK (0x3F00)
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 #define SERIAL_EVENT_ERROR (1 << 1)
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 /**
bogdanm 0:9b334a45a8ff 34 * @defgroup SerialTXEvents Serial TX Events Macros
bogdanm 0:9b334a45a8ff 35 *
bogdanm 0:9b334a45a8ff 36 * @{
bogdanm 0:9b334a45a8ff 37 */
bogdanm 0:9b334a45a8ff 38 #define SERIAL_EVENT_TX_COMPLETE (1 << (SERIAL_EVENT_TX_SHIFT + 0))
bogdanm 0:9b334a45a8ff 39 #define SERIAL_EVENT_TX_ALL (SERIAL_EVENT_TX_COMPLETE)
bogdanm 0:9b334a45a8ff 40 /**@}*/
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 /**
bogdanm 0:9b334a45a8ff 43 * @defgroup SerialRXEvents Serial RX Events Macros
bogdanm 0:9b334a45a8ff 44 *
bogdanm 0:9b334a45a8ff 45 * @{
bogdanm 0:9b334a45a8ff 46 */
bogdanm 0:9b334a45a8ff 47 #define SERIAL_EVENT_RX_COMPLETE (1 << (SERIAL_EVENT_RX_SHIFT + 0))
bogdanm 0:9b334a45a8ff 48 #define SERIAL_EVENT_RX_OVERRUN_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 1))
bogdanm 0:9b334a45a8ff 49 #define SERIAL_EVENT_RX_FRAMING_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 2))
bogdanm 0:9b334a45a8ff 50 #define SERIAL_EVENT_RX_PARITY_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 3))
bogdanm 0:9b334a45a8ff 51 #define SERIAL_EVENT_RX_OVERFLOW (1 << (SERIAL_EVENT_RX_SHIFT + 4))
bogdanm 0:9b334a45a8ff 52 #define SERIAL_EVENT_RX_CHARACTER_MATCH (1 << (SERIAL_EVENT_RX_SHIFT + 5))
bogdanm 0:9b334a45a8ff 53 #define SERIAL_EVENT_RX_ALL (SERIAL_EVENT_RX_OVERFLOW | SERIAL_EVENT_RX_PARITY_ERROR | \
bogdanm 0:9b334a45a8ff 54 SERIAL_EVENT_RX_FRAMING_ERROR | SERIAL_EVENT_RX_OVERRUN_ERROR | \
bogdanm 0:9b334a45a8ff 55 SERIAL_EVENT_RX_COMPLETE | SERIAL_EVENT_RX_CHARACTER_MATCH)
bogdanm 0:9b334a45a8ff 56 /**@}*/
bogdanm 0:9b334a45a8ff 57
bogdanm 0:9b334a45a8ff 58 #define SERIAL_RESERVED_CHAR_MATCH (255)
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 typedef enum {
bogdanm 0:9b334a45a8ff 61 ParityNone = 0,
bogdanm 0:9b334a45a8ff 62 ParityOdd = 1,
bogdanm 0:9b334a45a8ff 63 ParityEven = 2,
bogdanm 0:9b334a45a8ff 64 ParityForced1 = 3,
bogdanm 0:9b334a45a8ff 65 ParityForced0 = 4
bogdanm 0:9b334a45a8ff 66 } SerialParity;
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 typedef enum {
bogdanm 0:9b334a45a8ff 69 RxIrq,
bogdanm 0:9b334a45a8ff 70 TxIrq
bogdanm 0:9b334a45a8ff 71 } SerialIrq;
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 typedef enum {
bogdanm 0:9b334a45a8ff 74 FlowControlNone,
bogdanm 0:9b334a45a8ff 75 FlowControlRTS,
bogdanm 0:9b334a45a8ff 76 FlowControlCTS,
bogdanm 0:9b334a45a8ff 77 FlowControlRTSCTS
bogdanm 0:9b334a45a8ff 78 } FlowControl;
bogdanm 0:9b334a45a8ff 79
bogdanm 0:9b334a45a8ff 80 typedef void (*uart_irq_handler)(uint32_t id, SerialIrq event);
bogdanm 0:9b334a45a8ff 81
bogdanm 0:9b334a45a8ff 82 #if DEVICE_SERIAL_ASYNCH
bogdanm 0:9b334a45a8ff 83 /** Asynch serial hal structure
bogdanm 0:9b334a45a8ff 84 */
bogdanm 0:9b334a45a8ff 85 typedef struct {
bogdanm 0:9b334a45a8ff 86 struct serial_s serial; /**< Target specific serial structure */
bogdanm 0:9b334a45a8ff 87 struct buffer_s tx_buff; /**< Tx buffer */
bogdanm 0:9b334a45a8ff 88 struct buffer_s rx_buff; /**< Rx buffer */
bogdanm 0:9b334a45a8ff 89 uint8_t char_match; /**< Character to be matched */
bogdanm 0:9b334a45a8ff 90 uint8_t char_found; /**< State of the matched character */
bogdanm 0:9b334a45a8ff 91 } serial_t;
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 #else
bogdanm 0:9b334a45a8ff 94 /** Non-asynch serial hal structure
bogdanm 0:9b334a45a8ff 95 */
bogdanm 0:9b334a45a8ff 96 typedef struct serial_s serial_t;
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 #endif
bogdanm 0:9b334a45a8ff 99
bogdanm 0:9b334a45a8ff 100 #ifdef __cplusplus
bogdanm 0:9b334a45a8ff 101 extern "C" {
bogdanm 0:9b334a45a8ff 102 #endif
bogdanm 0:9b334a45a8ff 103
bogdanm 0:9b334a45a8ff 104 /**
bogdanm 0:9b334a45a8ff 105 * \defgroup GeneralSerial Serial Configuration Functions
bogdanm 0:9b334a45a8ff 106 * @{
bogdanm 0:9b334a45a8ff 107 */
bogdanm 0:9b334a45a8ff 108
bogdanm 0:9b334a45a8ff 109 /** Initialize the serial peripheral. It sets the default parameters for serial
bogdanm 0:9b334a45a8ff 110 * peripheral, and configure its specifieds pins.
bogdanm 0:9b334a45a8ff 111 *
bogdanm 0:9b334a45a8ff 112 * @param obj The serial object
bogdanm 0:9b334a45a8ff 113 * @param tx The TX pin
bogdanm 0:9b334a45a8ff 114 * @param rx The RX pin
bogdanm 0:9b334a45a8ff 115 */
bogdanm 0:9b334a45a8ff 116 void serial_init(serial_t *obj, PinName tx, PinName rx);
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 /** Release the serial peripheral, not currently invoked. It requires further
bogdanm 0:9b334a45a8ff 119 * resource management.
bogdanm 0:9b334a45a8ff 120 *
bogdanm 0:9b334a45a8ff 121 * @param obj The serial object
bogdanm 0:9b334a45a8ff 122 */
bogdanm 0:9b334a45a8ff 123 void serial_free(serial_t *obj);
bogdanm 0:9b334a45a8ff 124
bogdanm 0:9b334a45a8ff 125 /** Configure the baud rate
bogdanm 0:9b334a45a8ff 126 *
bogdanm 0:9b334a45a8ff 127 * @param obj The serial object
bogdanm 0:9b334a45a8ff 128 * @param baudrate The baud rate to be configured
bogdanm 0:9b334a45a8ff 129 */
bogdanm 0:9b334a45a8ff 130 void serial_baud(serial_t *obj, int baudrate);
bogdanm 0:9b334a45a8ff 131
bogdanm 0:9b334a45a8ff 132 /** Configure the format. Set the number of bits, parity and the number of stop bits
bogdanm 0:9b334a45a8ff 133 *
bogdanm 0:9b334a45a8ff 134 * @param obj The serial object
bogdanm 0:9b334a45a8ff 135 * @param data_bits The number of data bits
bogdanm 0:9b334a45a8ff 136 * @param parity The parity
bogdanm 0:9b334a45a8ff 137 * @param stop_bits The number of stop bits
bogdanm 0:9b334a45a8ff 138 */
bogdanm 0:9b334a45a8ff 139 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits);
bogdanm 0:9b334a45a8ff 140
bogdanm 0:9b334a45a8ff 141 /** The serial interrupt handler registration.
bogdanm 0:9b334a45a8ff 142 *
bogdanm 0:9b334a45a8ff 143 * @param obj The serial object
bogdanm 0:9b334a45a8ff 144 * @param handler The interrupt handler which will be invoked when interrupt fires.
bogdanm 0:9b334a45a8ff 145 * @param id The SerialBase object
bogdanm 0:9b334a45a8ff 146 */
bogdanm 0:9b334a45a8ff 147 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id);
bogdanm 0:9b334a45a8ff 148
bogdanm 0:9b334a45a8ff 149 /** Configure serial interrupt. This function is used for word-approach
bogdanm 0:9b334a45a8ff 150 *
bogdanm 0:9b334a45a8ff 151 * @param obj The serial object
bogdanm 0:9b334a45a8ff 152 * @param irq The serial IRQ type (RX or TX)
bogdanm 0:9b334a45a8ff 153 * @param enable Set to non-zero to enable events, or zero to disable them
bogdanm 0:9b334a45a8ff 154 */
bogdanm 0:9b334a45a8ff 155 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable);
bogdanm 0:9b334a45a8ff 156
bogdanm 0:9b334a45a8ff 157 /** Get character. This is a blocking call, waiting for a character
bogdanm 0:9b334a45a8ff 158 *
bogdanm 0:9b334a45a8ff 159 * @param obj The serial object
bogdanm 0:9b334a45a8ff 160 */
bogdanm 0:9b334a45a8ff 161 int serial_getc(serial_t *obj);
bogdanm 0:9b334a45a8ff 162
bogdanm 0:9b334a45a8ff 163 /** Put a character. This is a blocking call, waiting for a peripheral to be available
bogdanm 0:9b334a45a8ff 164 * for writing
bogdanm 0:9b334a45a8ff 165 *
bogdanm 0:9b334a45a8ff 166 * @param obj The serial object
bogdanm 0:9b334a45a8ff 167 * @param c The character to be sent
bogdanm 0:9b334a45a8ff 168 */
bogdanm 0:9b334a45a8ff 169 void serial_putc(serial_t *obj, int c);
bogdanm 0:9b334a45a8ff 170
bogdanm 0:9b334a45a8ff 171 /** Check if the serial peripheral is readable
bogdanm 0:9b334a45a8ff 172 *
bogdanm 0:9b334a45a8ff 173 * @param obj The serial object
bogdanm 0:9b334a45a8ff 174 * @return Non-zero value if a character can be read, 0 if nothing to read.
bogdanm 0:9b334a45a8ff 175 */
bogdanm 0:9b334a45a8ff 176 int serial_readable(serial_t *obj);
bogdanm 0:9b334a45a8ff 177
bogdanm 0:9b334a45a8ff 178 /** Check if the serial peripheral is writable
bogdanm 0:9b334a45a8ff 179 *
bogdanm 0:9b334a45a8ff 180 * @param obj The serial object
bogdanm 0:9b334a45a8ff 181 * @return Non-zero value if a character can be written, 0 otherwise.
bogdanm 0:9b334a45a8ff 182 */
bogdanm 0:9b334a45a8ff 183 int serial_writable(serial_t *obj);
bogdanm 0:9b334a45a8ff 184
bogdanm 0:9b334a45a8ff 185 /** Clear the serial peripheral
bogdanm 0:9b334a45a8ff 186 *
bogdanm 0:9b334a45a8ff 187 * @param obj The serial object
bogdanm 0:9b334a45a8ff 188 */
bogdanm 0:9b334a45a8ff 189 void serial_clear(serial_t *obj);
bogdanm 0:9b334a45a8ff 190
bogdanm 0:9b334a45a8ff 191 /** Set the break
bogdanm 0:9b334a45a8ff 192 *
bogdanm 0:9b334a45a8ff 193 * @param obj The serial object
bogdanm 0:9b334a45a8ff 194 */
bogdanm 0:9b334a45a8ff 195 void serial_break_set(serial_t *obj);
bogdanm 0:9b334a45a8ff 196
bogdanm 0:9b334a45a8ff 197 /** Clear the break
bogdanm 0:9b334a45a8ff 198 *
bogdanm 0:9b334a45a8ff 199 * @param obj The serial object
bogdanm 0:9b334a45a8ff 200 */
bogdanm 0:9b334a45a8ff 201 void serial_break_clear(serial_t *obj);
bogdanm 0:9b334a45a8ff 202
bogdanm 0:9b334a45a8ff 203 /** Configure the TX pin for UART function.
bogdanm 0:9b334a45a8ff 204 *
bogdanm 0:9b334a45a8ff 205 * @param tx The pin used for TX
bogdanm 0:9b334a45a8ff 206 */
bogdanm 0:9b334a45a8ff 207 void serial_pinout_tx(PinName tx);
bogdanm 0:9b334a45a8ff 208
bogdanm 0:9b334a45a8ff 209 /** Configure the serial for the flow control. It sets flow control in the hardware
bogdanm 0:9b334a45a8ff 210 * if a serial peripheral supports it, otherwise software emulation is used.
bogdanm 0:9b334a45a8ff 211 *
bogdanm 0:9b334a45a8ff 212 * @param obj The serial object
bogdanm 0:9b334a45a8ff 213 * @param type The type of the flow control. Look at the available FlowControl types.
bogdanm 0:9b334a45a8ff 214 * @param rxflow The tx pin
bogdanm 0:9b334a45a8ff 215 * @param txflow The rx pin
bogdanm 0:9b334a45a8ff 216 */
bogdanm 0:9b334a45a8ff 217 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow);
bogdanm 0:9b334a45a8ff 218
bogdanm 0:9b334a45a8ff 219 #if DEVICE_SERIAL_ASYNCH
bogdanm 0:9b334a45a8ff 220
bogdanm 0:9b334a45a8ff 221 /**@}*/
bogdanm 0:9b334a45a8ff 222
bogdanm 0:9b334a45a8ff 223 /**
bogdanm 0:9b334a45a8ff 224 * \defgroup AsynchSerial Asynchronous Serial Hardware Abstraction Layer
bogdanm 0:9b334a45a8ff 225 * @{
bogdanm 0:9b334a45a8ff 226 */
bogdanm 0:9b334a45a8ff 227
bogdanm 0:9b334a45a8ff 228 /** Begin asynchronous TX transfer. The used buffer is specified in the serial object,
bogdanm 0:9b334a45a8ff 229 * tx_buff
bogdanm 0:9b334a45a8ff 230 *
bogdanm 0:9b334a45a8ff 231 * @param obj The serial object
bogdanm 0:9b334a45a8ff 232 * @param tx The buffer for sending
bogdanm 0:9b334a45a8ff 233 * @param tx_length The number of words to transmit
bogdanm 0:9b334a45a8ff 234 * @param tx_width The bit width of buffer word
bogdanm 0:9b334a45a8ff 235 * @param handler The serial handler
bogdanm 0:9b334a45a8ff 236 * @param event The logical OR of events to be registered
bogdanm 0:9b334a45a8ff 237 * @param hint A suggestion for how to use DMA with this transfer
bogdanm 0:9b334a45a8ff 238 * @return Returns number of data transfered, or 0 otherwise
bogdanm 0:9b334a45a8ff 239 */
bogdanm 0:9b334a45a8ff 240 int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint);
bogdanm 0:9b334a45a8ff 241
bogdanm 0:9b334a45a8ff 242 /** Begin asynchronous RX transfer (enable interrupt for data collecting)
bogdanm 0:9b334a45a8ff 243 * The used buffer is specified in the serial object - rx_buff
bogdanm 0:9b334a45a8ff 244 *
bogdanm 0:9b334a45a8ff 245 * @param obj The serial object
bogdanm 0:9b334a45a8ff 246 * @param rx The buffer for sending
bogdanm 0:9b334a45a8ff 247 * @param rx_length The number of words to transmit
bogdanm 0:9b334a45a8ff 248 * @param rx_width The bit width of buffer word
bogdanm 0:9b334a45a8ff 249 * @param handler The serial handler
bogdanm 0:9b334a45a8ff 250 * @param event The logical OR of events to be registered
bogdanm 0:9b334a45a8ff 251 * @param handler The serial handler
bogdanm 0:9b334a45a8ff 252 * @param char_match A character in range 0-254 to be matched
bogdanm 0:9b334a45a8ff 253 * @param hint A suggestion for how to use DMA with this transfer
bogdanm 0:9b334a45a8ff 254 */
bogdanm 0:9b334a45a8ff 255 void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint);
bogdanm 0:9b334a45a8ff 256
bogdanm 0:9b334a45a8ff 257 /** Attempts to determine if the serial peripheral is already in use for TX
bogdanm 0:9b334a45a8ff 258 *
bogdanm 0:9b334a45a8ff 259 * @param obj The serial object
bogdanm 0:9b334a45a8ff 260 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
bogdanm 0:9b334a45a8ff 261 */
bogdanm 0:9b334a45a8ff 262 uint8_t serial_tx_active(serial_t *obj);
bogdanm 0:9b334a45a8ff 263
bogdanm 0:9b334a45a8ff 264 /** Attempts to determine if the serial peripheral is already in use for RX
bogdanm 0:9b334a45a8ff 265 *
bogdanm 0:9b334a45a8ff 266 * @param obj The serial object
bogdanm 0:9b334a45a8ff 267 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
bogdanm 0:9b334a45a8ff 268 */
bogdanm 0:9b334a45a8ff 269 uint8_t serial_rx_active(serial_t *obj);
bogdanm 0:9b334a45a8ff 270
bogdanm 0:9b334a45a8ff 271 /** The asynchronous TX and RX handler.
bogdanm 0:9b334a45a8ff 272 *
bogdanm 0:9b334a45a8ff 273 * @param obj The serial object
bogdanm 0:9b334a45a8ff 274 * @return Returns event flags if a RX transfer termination condition was met or 0 otherwise
bogdanm 0:9b334a45a8ff 275 */
bogdanm 0:9b334a45a8ff 276 int serial_irq_handler_asynch(serial_t *obj);
bogdanm 0:9b334a45a8ff 277
bogdanm 0:9b334a45a8ff 278 /** Abort the ongoing TX transaction. It disables the enabled interupt for TX and
bogdanm 0:9b334a45a8ff 279 * flush TX hardware buffer if TX FIFO is used
bogdanm 0:9b334a45a8ff 280 *
bogdanm 0:9b334a45a8ff 281 * @param obj The serial object
bogdanm 0:9b334a45a8ff 282 */
bogdanm 0:9b334a45a8ff 283 void serial_tx_abort_asynch(serial_t *obj);
bogdanm 0:9b334a45a8ff 284
bogdanm 0:9b334a45a8ff 285 /** Abort the ongoing RX transaction It disables the enabled interrupt for RX and
bogdanm 0:9b334a45a8ff 286 * flush RX hardware buffer if RX FIFO is used
bogdanm 0:9b334a45a8ff 287 *
bogdanm 0:9b334a45a8ff 288 * @param obj The serial object
bogdanm 0:9b334a45a8ff 289 */
bogdanm 0:9b334a45a8ff 290 void serial_rx_abort_asynch(serial_t *obj);
bogdanm 0:9b334a45a8ff 291
bogdanm 0:9b334a45a8ff 292 /**@}*/
bogdanm 0:9b334a45a8ff 293
bogdanm 0:9b334a45a8ff 294 #endif
bogdanm 0:9b334a45a8ff 295
bogdanm 0:9b334a45a8ff 296 #ifdef __cplusplus
bogdanm 0:9b334a45a8ff 297 }
bogdanm 0:9b334a45a8ff 298 #endif
bogdanm 0:9b334a45a8ff 299
bogdanm 0:9b334a45a8ff 300 #endif
bogdanm 0:9b334a45a8ff 301
bogdanm 0:9b334a45a8ff 302 #endif