zain aftab / mbed-src

mbed library sources

Fork of mbed-src by mbed official

hal/serial_api.h@526:c320967f86b9, 2015-04-28 (annotated)

Committer:
mbed_official
Date:
Tue Apr 28 11:45:12 2015 +0100
Revision:
526:c320967f86b9
Parent:
64:7b352733b00a
Child:
564:536c9fb088a0
Synchronized with git revision 299385b8331142b9dc524da7a986536f60b14553



Full URL: https://github.com/mbedmicro/mbed/commit/299385b8331142b9dc524da7a986536f60b14553/



Add in Silicon Labs targets with asynchronous API support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_SERIAL_API_H
bogdanm 13:0645d8841f51 17 #define MBED_SERIAL_API_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "device.h"
mbed_official 526:c320967f86b9 20 #include "buffer.h"
mbed_official 526:c320967f86b9 21 #include "dma_api.h"
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 #if DEVICE_SERIAL
bogdanm 13:0645d8841f51 24
mbed_official 526:c320967f86b9 25 #define SERIAL_EVENT_TX_SHIFT (2)
mbed_official 526:c320967f86b9 26 #define SERIAL_EVENT_RX_SHIFT (8)
mbed_official 526:c320967f86b9 27
mbed_official 526:c320967f86b9 28 #define SERIAL_EVENT_TX_MASK (0x00FC)
mbed_official 526:c320967f86b9 29 #define SERIAL_EVENT_RX_MASK (0x3F00)
mbed_official 526:c320967f86b9 30
mbed_official 526:c320967f86b9 31 #define SERIAL_EVENT_ERROR (1 << 1)
mbed_official 526:c320967f86b9 32
mbed_official 526:c320967f86b9 33 /**
mbed_official 526:c320967f86b9 34 * @defgroup SerialTXEvents Serial TX Events Macros
mbed_official 526:c320967f86b9 35 *
mbed_official 526:c320967f86b9 36 * @{
mbed_official 526:c320967f86b9 37 */
mbed_official 526:c320967f86b9 38 #define SERIAL_EVENT_TX_COMPLETE (1 << (SERIAL_EVENT_TX_SHIFT + 0))
mbed_official 526:c320967f86b9 39 #define SERIAL_EVENT_TX_ALL (SERIAL_EVENT_TX_COMPLETE)
mbed_official 526:c320967f86b9 40 /**@}*/
mbed_official 526:c320967f86b9 41
mbed_official 526:c320967f86b9 42 /**
mbed_official 526:c320967f86b9 43 * @defgroup SerialRXEvents Serial RX Events Macros
mbed_official 526:c320967f86b9 44 *
mbed_official 526:c320967f86b9 45 * @{
mbed_official 526:c320967f86b9 46 */
mbed_official 526:c320967f86b9 47 #define SERIAL_EVENT_RX_COMPLETE (1 << (SERIAL_EVENT_RX_SHIFT + 0))
mbed_official 526:c320967f86b9 48 #define SERIAL_EVENT_RX_OVERRUN_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 1))
mbed_official 526:c320967f86b9 49 #define SERIAL_EVENT_RX_FRAMING_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 2))
mbed_official 526:c320967f86b9 50 #define SERIAL_EVENT_RX_PARITY_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 3))
mbed_official 526:c320967f86b9 51 #define SERIAL_EVENT_RX_OVERFLOW (1 << (SERIAL_EVENT_RX_SHIFT + 4))
mbed_official 526:c320967f86b9 52 #define SERIAL_EVENT_RX_CHARACTER_MATCH (1 << (SERIAL_EVENT_RX_SHIFT + 5))
mbed_official 526:c320967f86b9 53 #define SERIAL_EVENT_RX_ALL (SERIAL_EVENT_RX_OVERFLOW | SERIAL_EVENT_RX_PARITY_ERROR | \
mbed_official 526:c320967f86b9 54 SERIAL_EVENT_RX_FRAMING_ERROR | SERIAL_EVENT_RX_OVERRUN_ERROR | \
mbed_official 526:c320967f86b9 55 SERIAL_EVENT_RX_COMPLETE | SERIAL_EVENT_RX_CHARACTER_MATCH)
mbed_official 526:c320967f86b9 56 /**@}*/
mbed_official 526:c320967f86b9 57
mbed_official 526:c320967f86b9 58 #define SERIAL_RESERVED_CHAR_MATCH (255)
bogdanm 13:0645d8841f51 59
bogdanm 13:0645d8841f51 60 typedef enum {
bogdanm 13:0645d8841f51 61 ParityNone = 0,
bogdanm 13:0645d8841f51 62 ParityOdd = 1,
bogdanm 13:0645d8841f51 63 ParityEven = 2,
bogdanm 13:0645d8841f51 64 ParityForced1 = 3,
bogdanm 13:0645d8841f51 65 ParityForced0 = 4
bogdanm 13:0645d8841f51 66 } SerialParity;
bogdanm 13:0645d8841f51 67
bogdanm 13:0645d8841f51 68 typedef enum {
bogdanm 13:0645d8841f51 69 RxIrq,
bogdanm 13:0645d8841f51 70 TxIrq
bogdanm 13:0645d8841f51 71 } SerialIrq;
bogdanm 13:0645d8841f51 72
mbed_official 64:7b352733b00a 73 typedef enum {
mbed_official 64:7b352733b00a 74 FlowControlNone,
mbed_official 64:7b352733b00a 75 FlowControlRTS,
mbed_official 64:7b352733b00a 76 FlowControlCTS,
mbed_official 64:7b352733b00a 77 FlowControlRTSCTS
mbed_official 64:7b352733b00a 78 } FlowControl;
mbed_official 64:7b352733b00a 79
bogdanm 13:0645d8841f51 80 typedef void (*uart_irq_handler)(uint32_t id, SerialIrq event);
bogdanm 13:0645d8841f51 81
mbed_official 526:c320967f86b9 82 #if DEVICE_SERIAL_ASYNCH
mbed_official 526:c320967f86b9 83 /** Asynch serial hal structure
mbed_official 526:c320967f86b9 84 */
mbed_official 526:c320967f86b9 85 typedef struct {
mbed_official 526:c320967f86b9 86 struct serial_s serial; /**< Target specific serial structure */
mbed_official 526:c320967f86b9 87 struct buffer_s tx_buff; /**< Tx buffer */
mbed_official 526:c320967f86b9 88 struct buffer_s rx_buff; /**< Rx buffer */
mbed_official 526:c320967f86b9 89 uint8_t char_match; /**< Character to be matched */
mbed_official 526:c320967f86b9 90 uint8_t char_found; /**< State of the matched character */
mbed_official 526:c320967f86b9 91 } serial_t;
mbed_official 526:c320967f86b9 92
mbed_official 526:c320967f86b9 93 #else
mbed_official 526:c320967f86b9 94 /** Non-asynch serial hal structure
mbed_official 526:c320967f86b9 95 */
bogdanm 13:0645d8841f51 96 typedef struct serial_s serial_t;
bogdanm 13:0645d8841f51 97
mbed_official 526:c320967f86b9 98 #endif
mbed_official 526:c320967f86b9 99
mbed_official 526:c320967f86b9 100 #ifdef __cplusplus
mbed_official 526:c320967f86b9 101 extern "C" {
mbed_official 526:c320967f86b9 102 #endif
mbed_official 526:c320967f86b9 103
mbed_official 526:c320967f86b9 104 /**
mbed_official 526:c320967f86b9 105 * \defgroup GeneralSerial Serial Configuration Functions
mbed_official 526:c320967f86b9 106 * @{
mbed_official 526:c320967f86b9 107 */
mbed_official 526:c320967f86b9 108
mbed_official 526:c320967f86b9 109 /** Initialize the serial peripheral. It sets the default parameters for serial
mbed_official 526:c320967f86b9 110 * peripheral, and configure its specifieds pins.
mbed_official 526:c320967f86b9 111 *
mbed_official 526:c320967f86b9 112 * @param obj The serial object
mbed_official 526:c320967f86b9 113 * @param tx The TX pin
mbed_official 526:c320967f86b9 114 * @param rx The RX pin
mbed_official 526:c320967f86b9 115 */
mbed_official 526:c320967f86b9 116 void serial_init(serial_t *obj, PinName tx, PinName rx);
bogdanm 13:0645d8841f51 117
mbed_official 526:c320967f86b9 118 /** Release the serial peripheral, not currently invoked. It requires further
mbed_official 526:c320967f86b9 119 * resource management.
mbed_official 526:c320967f86b9 120 *
mbed_official 526:c320967f86b9 121 * @param obj The serial object
mbed_official 526:c320967f86b9 122 */
mbed_official 526:c320967f86b9 123 void serial_free(serial_t *obj);
mbed_official 526:c320967f86b9 124
mbed_official 526:c320967f86b9 125 /** Configure the baud rate
mbed_official 526:c320967f86b9 126 *
mbed_official 526:c320967f86b9 127 * @param obj The serial object
mbed_official 526:c320967f86b9 128 * @param baudrate The baud rate to be configured
mbed_official 526:c320967f86b9 129 */
mbed_official 526:c320967f86b9 130 void serial_baud(serial_t *obj, int baudrate);
mbed_official 526:c320967f86b9 131
mbed_official 526:c320967f86b9 132 /** Configure the format. Set the number of bits, parity and the number of stop bits
mbed_official 526:c320967f86b9 133 *
mbed_official 526:c320967f86b9 134 * @param obj The serial object
mbed_official 526:c320967f86b9 135 * @param data_bits The number of data bits
mbed_official 526:c320967f86b9 136 * @param parity The parity
mbed_official 526:c320967f86b9 137 * @param stop_bits The number of stop bits
mbed_official 526:c320967f86b9 138 */
mbed_official 526:c320967f86b9 139 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits);
mbed_official 526:c320967f86b9 140
mbed_official 526:c320967f86b9 141 /** The serial interrupt handler registration.
mbed_official 526:c320967f86b9 142 *
mbed_official 526:c320967f86b9 143 * @param obj The serial object
mbed_official 526:c320967f86b9 144 * @param handler The interrupt handler which will be invoked when interrupt fires.
mbed_official 526:c320967f86b9 145 * @param id The SerialBase object
mbed_official 526:c320967f86b9 146 */
bogdanm 13:0645d8841f51 147 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id);
bogdanm 13:0645d8841f51 148
mbed_official 526:c320967f86b9 149 /** Configure serial interrupt. This function is used for word-approach
mbed_official 526:c320967f86b9 150 *
mbed_official 526:c320967f86b9 151 * @param obj The serial object
mbed_official 526:c320967f86b9 152 * @param irq The serial IRQ type (RX or TX)
mbed_official 526:c320967f86b9 153 * @param enable Set to non-zero to enable events, or zero to disable them
mbed_official 526:c320967f86b9 154 */
mbed_official 526:c320967f86b9 155 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable);
mbed_official 526:c320967f86b9 156
mbed_official 526:c320967f86b9 157 /** Get character. This is a blocking call, waiting for a character
mbed_official 526:c320967f86b9 158 *
mbed_official 526:c320967f86b9 159 * @param obj The serial object
mbed_official 526:c320967f86b9 160 */
mbed_official 526:c320967f86b9 161 int serial_getc(serial_t *obj);
mbed_official 526:c320967f86b9 162
mbed_official 526:c320967f86b9 163 /** Put a character. This is a blocking call, waiting for a peripheral to be available
mbed_official 526:c320967f86b9 164 * for writing
mbed_official 526:c320967f86b9 165 *
mbed_official 526:c320967f86b9 166 * @param obj The serial object
mbed_official 526:c320967f86b9 167 * @param c The character to be sent
mbed_official 526:c320967f86b9 168 */
mbed_official 526:c320967f86b9 169 void serial_putc(serial_t *obj, int c);
bogdanm 13:0645d8841f51 170
mbed_official 526:c320967f86b9 171 /** Check if the serial peripheral is readable
mbed_official 526:c320967f86b9 172 *
mbed_official 526:c320967f86b9 173 * @param obj The serial object
mbed_official 526:c320967f86b9 174 * @return Non-zero value if a character can be read, 0 if nothing to read.
mbed_official 526:c320967f86b9 175 */
mbed_official 526:c320967f86b9 176 int serial_readable(serial_t *obj);
mbed_official 526:c320967f86b9 177
mbed_official 526:c320967f86b9 178 /** Check if the serial peripheral is writable
mbed_official 526:c320967f86b9 179 *
mbed_official 526:c320967f86b9 180 * @param obj The serial object
mbed_official 526:c320967f86b9 181 * @return Non-zero value if a character can be written, 0 otherwise.
mbed_official 526:c320967f86b9 182 */
mbed_official 526:c320967f86b9 183 int serial_writable(serial_t *obj);
mbed_official 526:c320967f86b9 184
mbed_official 526:c320967f86b9 185 /** Clear the serial peripheral
mbed_official 526:c320967f86b9 186 *
mbed_official 526:c320967f86b9 187 * @param obj The serial object
mbed_official 526:c320967f86b9 188 */
mbed_official 526:c320967f86b9 189 void serial_clear(serial_t *obj);
mbed_official 526:c320967f86b9 190
mbed_official 526:c320967f86b9 191 /** Set the break
mbed_official 526:c320967f86b9 192 *
mbed_official 526:c320967f86b9 193 * @param obj The serial object
mbed_official 526:c320967f86b9 194 */
mbed_official 526:c320967f86b9 195 void serial_break_set(serial_t *obj);
mbed_official 526:c320967f86b9 196
mbed_official 526:c320967f86b9 197 /** Clear the break
mbed_official 526:c320967f86b9 198 *
mbed_official 526:c320967f86b9 199 * @param obj The serial object
mbed_official 526:c320967f86b9 200 */
bogdanm 13:0645d8841f51 201 void serial_break_clear(serial_t *obj);
bogdanm 13:0645d8841f51 202
mbed_official 526:c320967f86b9 203 /** Configure the TX pin for UART function.
mbed_official 526:c320967f86b9 204 *
mbed_official 526:c320967f86b9 205 * @param tx The pin used for TX
mbed_official 526:c320967f86b9 206 */
bogdanm 13:0645d8841f51 207 void serial_pinout_tx(PinName tx);
bogdanm 13:0645d8841f51 208
mbed_official 526:c320967f86b9 209 /** Configure the serial for the flow control. It sets flow control in the hardware
mbed_official 526:c320967f86b9 210 * if a serial peripheral supports it, otherwise software emulation is used.
mbed_official 526:c320967f86b9 211 *
mbed_official 526:c320967f86b9 212 * @param obj The serial object
mbed_official 526:c320967f86b9 213 * @param type The type of the flow control. Look at the available FlowControl types.
mbed_official 526:c320967f86b9 214 * @param rxflow The tx pin
mbed_official 526:c320967f86b9 215 * @param txflow The rx pin
mbed_official 526:c320967f86b9 216 */
mbed_official 64:7b352733b00a 217 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow);
mbed_official 64:7b352733b00a 218
mbed_official 526:c320967f86b9 219 #if DEVICE_SERIAL_ASYNCH
mbed_official 526:c320967f86b9 220
mbed_official 526:c320967f86b9 221 /**@}*/
mbed_official 526:c320967f86b9 222
mbed_official 526:c320967f86b9 223 /**
mbed_official 526:c320967f86b9 224 * \defgroup AsynchSerial Asynchronous Serial Hardware Abstraction Layer
mbed_official 526:c320967f86b9 225 * @{
mbed_official 526:c320967f86b9 226 */
mbed_official 526:c320967f86b9 227
mbed_official 526:c320967f86b9 228 /** Begin asynchronous TX transfer. The used buffer is specified in the serial object,
mbed_official 526:c320967f86b9 229 * tx_buff
mbed_official 526:c320967f86b9 230 *
mbed_official 526:c320967f86b9 231 * @param obj The serial object
mbed_official 526:c320967f86b9 232 * @param tx The buffer for sending
mbed_official 526:c320967f86b9 233 * @param tx_length The number of words to transmit
mbed_official 526:c320967f86b9 234 * @param tx_width The bit width of buffer word
mbed_official 526:c320967f86b9 235 * @param handler The serial handler
mbed_official 526:c320967f86b9 236 * @param event The logical OR of events to be registered
mbed_official 526:c320967f86b9 237 * @param hint A suggestion for how to use DMA with this transfer
mbed_official 526:c320967f86b9 238 * @return Returns number of data transfered, or 0 otherwise
mbed_official 526:c320967f86b9 239 */
mbed_official 526:c320967f86b9 240 int serial_tx_asynch(serial_t *obj, void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint);
mbed_official 526:c320967f86b9 241
mbed_official 526:c320967f86b9 242 /** Begin asynchronous RX transfer (enable interrupt for data collecting)
mbed_official 526:c320967f86b9 243 * The used buffer is specified in the serial object - rx_buff
mbed_official 526:c320967f86b9 244 *
mbed_official 526:c320967f86b9 245 * @param obj The serial object
mbed_official 526:c320967f86b9 246 * @param rx The buffer for sending
mbed_official 526:c320967f86b9 247 * @param rx_length The number of words to transmit
mbed_official 526:c320967f86b9 248 * @param rx_width The bit width of buffer word
mbed_official 526:c320967f86b9 249 * @param handler The serial handler
mbed_official 526:c320967f86b9 250 * @param event The logical OR of events to be registered
mbed_official 526:c320967f86b9 251 * @param handler The serial handler
mbed_official 526:c320967f86b9 252 * @param char_match A character in range 0-254 to be matched
mbed_official 526:c320967f86b9 253 * @param hint A suggestion for how to use DMA with this transfer
mbed_official 526:c320967f86b9 254 */
mbed_official 526:c320967f86b9 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);
mbed_official 526:c320967f86b9 256
mbed_official 526:c320967f86b9 257 /** Attempts to determine if the serial peripheral is already in use for TX
mbed_official 526:c320967f86b9 258 *
mbed_official 526:c320967f86b9 259 * @param obj The serial object
mbed_official 526:c320967f86b9 260 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
mbed_official 526:c320967f86b9 261 */
mbed_official 526:c320967f86b9 262 uint8_t serial_tx_active(serial_t *obj);
mbed_official 526:c320967f86b9 263
mbed_official 526:c320967f86b9 264 /** Attempts to determine if the serial peripheral is already in use for RX
mbed_official 526:c320967f86b9 265 *
mbed_official 526:c320967f86b9 266 * @param obj The serial object
mbed_official 526:c320967f86b9 267 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
mbed_official 526:c320967f86b9 268 */
mbed_official 526:c320967f86b9 269 uint8_t serial_rx_active(serial_t *obj);
mbed_official 526:c320967f86b9 270
mbed_official 526:c320967f86b9 271 /** The asynchronous TX and RX handler.
mbed_official 526:c320967f86b9 272 *
mbed_official 526:c320967f86b9 273 * @param obj The serial object
mbed_official 526:c320967f86b9 274 * @return Returns event flags if a RX transfer termination condition was met or 0 otherwise
mbed_official 526:c320967f86b9 275 */
mbed_official 526:c320967f86b9 276 int serial_irq_handler_asynch(serial_t *obj);
mbed_official 526:c320967f86b9 277
mbed_official 526:c320967f86b9 278 /** Abort the ongoing TX transaction. It disables the enabled interupt for TX and
mbed_official 526:c320967f86b9 279 * flush TX hardware buffer if TX FIFO is used
mbed_official 526:c320967f86b9 280 *
mbed_official 526:c320967f86b9 281 * @param obj The serial object
mbed_official 526:c320967f86b9 282 */
mbed_official 526:c320967f86b9 283 void serial_tx_abort_asynch(serial_t *obj);
mbed_official 526:c320967f86b9 284
mbed_official 526:c320967f86b9 285 /** Abort the ongoing RX transaction It disables the enabled interrupt for RX and
mbed_official 526:c320967f86b9 286 * flush RX hardware buffer if RX FIFO is used
mbed_official 526:c320967f86b9 287 *
mbed_official 526:c320967f86b9 288 * @param obj The serial object
mbed_official 526:c320967f86b9 289 */
mbed_official 526:c320967f86b9 290 void serial_rx_abort_asynch(serial_t *obj);
mbed_official 526:c320967f86b9 291
mbed_official 526:c320967f86b9 292 /**@}*/
mbed_official 526:c320967f86b9 293
mbed_official 526:c320967f86b9 294 #endif
mbed_official 526:c320967f86b9 295
bogdanm 13:0645d8841f51 296 #ifdef __cplusplus
bogdanm 13:0645d8841f51 297 }
bogdanm 13:0645d8841f51 298 #endif
bogdanm 13:0645d8841f51 299
bogdanm 13:0645d8841f51 300 #endif
bogdanm 13:0645d8841f51 301
bogdanm 13:0645d8841f51 302 #endif