Elijah Stanger-Jones / mbed-dev-f303

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hal/serial_api.h@2:4364577b5ad8, 2020-11-09 (annotated)

Committer:
elijahsj
Date:
Mon Nov 09 00:33:19 2020 -0500
Revision:
2:4364577b5ad8
Parent:
1:8a094db1347f 
copied mbed library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elijahsj 1:8a094db1347f 1
elijahsj 1:8a094db1347f 2 /** \addtogroup hal */
elijahsj 1:8a094db1347f 3 /** @{*/
elijahsj 1:8a094db1347f 4 /* mbed Microcontroller Library
elijahsj 1:8a094db1347f 5 * Copyright (c) 2006-2013 ARM Limited
elijahsj 1:8a094db1347f 6 *
elijahsj 1:8a094db1347f 7 * Licensed under the Apache License, Version 2.0 (the "License");
elijahsj 1:8a094db1347f 8 * you may not use this file except in compliance with the License.
elijahsj 1:8a094db1347f 9 * You may obtain a copy of the License at
elijahsj 1:8a094db1347f 10 *
elijahsj 1:8a094db1347f 11 * http://www.apache.org/licenses/LICENSE-2.0
elijahsj 1:8a094db1347f 12 *
elijahsj 1:8a094db1347f 13 * Unless required by applicable law or agreed to in writing, software
elijahsj 1:8a094db1347f 14 * distributed under the License is distributed on an "AS IS" BASIS,
elijahsj 1:8a094db1347f 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elijahsj 1:8a094db1347f 16 * See the License for the specific language governing permissions and
elijahsj 1:8a094db1347f 17 * limitations under the License.
elijahsj 1:8a094db1347f 18 */
elijahsj 1:8a094db1347f 19 #ifndef MBED_SERIAL_API_H
elijahsj 1:8a094db1347f 20 #define MBED_SERIAL_API_H
elijahsj 1:8a094db1347f 21
elijahsj 1:8a094db1347f 22 #include "device.h"
elijahsj 1:8a094db1347f 23 #include "hal/buffer.h"
elijahsj 1:8a094db1347f 24 #include "hal/dma_api.h"
elijahsj 1:8a094db1347f 25
elijahsj 1:8a094db1347f 26 #if DEVICE_SERIAL
elijahsj 1:8a094db1347f 27
elijahsj 1:8a094db1347f 28 #define SERIAL_EVENT_TX_SHIFT (2)
elijahsj 1:8a094db1347f 29 #define SERIAL_EVENT_RX_SHIFT (8)
elijahsj 1:8a094db1347f 30
elijahsj 1:8a094db1347f 31 #define SERIAL_EVENT_TX_MASK (0x00FC)
elijahsj 1:8a094db1347f 32 #define SERIAL_EVENT_RX_MASK (0x3F00)
elijahsj 1:8a094db1347f 33
elijahsj 1:8a094db1347f 34 #define SERIAL_EVENT_ERROR (1 << 1)
elijahsj 1:8a094db1347f 35
elijahsj 1:8a094db1347f 36 /**
elijahsj 1:8a094db1347f 37 * @defgroup SerialTXEvents Serial TX Events Macros
elijahsj 1:8a094db1347f 38 *
elijahsj 1:8a094db1347f 39 * @{
elijahsj 1:8a094db1347f 40 */
elijahsj 1:8a094db1347f 41 #define SERIAL_EVENT_TX_COMPLETE (1 << (SERIAL_EVENT_TX_SHIFT + 0))
elijahsj 1:8a094db1347f 42 #define SERIAL_EVENT_TX_ALL (SERIAL_EVENT_TX_COMPLETE)
elijahsj 1:8a094db1347f 43 /**@}*/
elijahsj 1:8a094db1347f 44
elijahsj 1:8a094db1347f 45 /**
elijahsj 1:8a094db1347f 46 * @defgroup SerialRXEvents Serial RX Events Macros
elijahsj 1:8a094db1347f 47 *
elijahsj 1:8a094db1347f 48 * @{
elijahsj 1:8a094db1347f 49 */
elijahsj 1:8a094db1347f 50 #define SERIAL_EVENT_RX_COMPLETE (1 << (SERIAL_EVENT_RX_SHIFT + 0))
elijahsj 1:8a094db1347f 51 #define SERIAL_EVENT_RX_OVERRUN_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 1))
elijahsj 1:8a094db1347f 52 #define SERIAL_EVENT_RX_FRAMING_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 2))
elijahsj 1:8a094db1347f 53 #define SERIAL_EVENT_RX_PARITY_ERROR (1 << (SERIAL_EVENT_RX_SHIFT + 3))
elijahsj 1:8a094db1347f 54 #define SERIAL_EVENT_RX_OVERFLOW (1 << (SERIAL_EVENT_RX_SHIFT + 4))
elijahsj 1:8a094db1347f 55 #define SERIAL_EVENT_RX_CHARACTER_MATCH (1 << (SERIAL_EVENT_RX_SHIFT + 5))
elijahsj 1:8a094db1347f 56 #define SERIAL_EVENT_RX_ALL (SERIAL_EVENT_RX_OVERFLOW | SERIAL_EVENT_RX_PARITY_ERROR | \
elijahsj 1:8a094db1347f 57 SERIAL_EVENT_RX_FRAMING_ERROR | SERIAL_EVENT_RX_OVERRUN_ERROR | \
elijahsj 1:8a094db1347f 58 SERIAL_EVENT_RX_COMPLETE | SERIAL_EVENT_RX_CHARACTER_MATCH)
elijahsj 1:8a094db1347f 59 /**@}*/
elijahsj 1:8a094db1347f 60
elijahsj 1:8a094db1347f 61 #define SERIAL_RESERVED_CHAR_MATCH (255)
elijahsj 1:8a094db1347f 62
elijahsj 1:8a094db1347f 63 typedef enum {
elijahsj 1:8a094db1347f 64 ParityNone = 0,
elijahsj 1:8a094db1347f 65 ParityOdd = 1,
elijahsj 1:8a094db1347f 66 ParityEven = 2,
elijahsj 1:8a094db1347f 67 ParityForced1 = 3,
elijahsj 1:8a094db1347f 68 ParityForced0 = 4
elijahsj 1:8a094db1347f 69 } SerialParity;
elijahsj 1:8a094db1347f 70
elijahsj 1:8a094db1347f 71 typedef enum {
elijahsj 1:8a094db1347f 72 RxIrq,
elijahsj 1:8a094db1347f 73 TxIrq
elijahsj 1:8a094db1347f 74 } SerialIrq;
elijahsj 1:8a094db1347f 75
elijahsj 1:8a094db1347f 76 typedef enum {
elijahsj 1:8a094db1347f 77 FlowControlNone,
elijahsj 1:8a094db1347f 78 FlowControlRTS,
elijahsj 1:8a094db1347f 79 FlowControlCTS,
elijahsj 1:8a094db1347f 80 FlowControlRTSCTS
elijahsj 1:8a094db1347f 81 } FlowControl;
elijahsj 1:8a094db1347f 82
elijahsj 1:8a094db1347f 83 typedef void (*uart_irq_handler)(uint32_t id, SerialIrq event);
elijahsj 1:8a094db1347f 84
elijahsj 1:8a094db1347f 85 #if DEVICE_SERIAL_ASYNCH
elijahsj 1:8a094db1347f 86 /** Asynch serial HAL structure
elijahsj 1:8a094db1347f 87 */
elijahsj 1:8a094db1347f 88 typedef struct {
elijahsj 1:8a094db1347f 89 struct serial_s serial; /**< Target specific serial structure */
elijahsj 1:8a094db1347f 90 struct buffer_s tx_buff; /**< TX buffer */
elijahsj 1:8a094db1347f 91 struct buffer_s rx_buff; /**< RX buffer */
elijahsj 1:8a094db1347f 92 uint8_t char_match; /**< Character to be matched */
elijahsj 1:8a094db1347f 93 uint8_t char_found; /**< State of the matched character */
elijahsj 1:8a094db1347f 94 } serial_t;
elijahsj 1:8a094db1347f 95
elijahsj 1:8a094db1347f 96 #else
elijahsj 1:8a094db1347f 97 /** Non-asynch serial HAL structure
elijahsj 1:8a094db1347f 98 */
elijahsj 1:8a094db1347f 99 typedef struct serial_s serial_t;
elijahsj 1:8a094db1347f 100
elijahsj 1:8a094db1347f 101 #endif
elijahsj 1:8a094db1347f 102
elijahsj 1:8a094db1347f 103 #ifdef __cplusplus
elijahsj 1:8a094db1347f 104 extern "C" {
elijahsj 1:8a094db1347f 105 #endif
elijahsj 1:8a094db1347f 106
elijahsj 1:8a094db1347f 107 /**
elijahsj 1:8a094db1347f 108 * \defgroup hal_GeneralSerial Serial Configuration Functions
elijahsj 1:8a094db1347f 109 * @{
elijahsj 1:8a094db1347f 110 */
elijahsj 1:8a094db1347f 111
elijahsj 1:8a094db1347f 112 /** Initialize the serial peripheral. It sets the default parameters for serial
elijahsj 1:8a094db1347f 113 * peripheral, and configures its specifieds pins.
elijahsj 1:8a094db1347f 114 *
elijahsj 1:8a094db1347f 115 * @param obj The serial object
elijahsj 1:8a094db1347f 116 * @param tx The TX pin name
elijahsj 1:8a094db1347f 117 * @param rx The RX pin name
elijahsj 1:8a094db1347f 118 */
elijahsj 1:8a094db1347f 119 void serial_init(serial_t *obj, PinName tx, PinName rx);
elijahsj 1:8a094db1347f 120
elijahsj 1:8a094db1347f 121 /** Release the serial peripheral, not currently invoked. It requires further
elijahsj 1:8a094db1347f 122 * resource management.
elijahsj 1:8a094db1347f 123 *
elijahsj 1:8a094db1347f 124 * @param obj The serial object
elijahsj 1:8a094db1347f 125 */
elijahsj 1:8a094db1347f 126 void serial_free(serial_t *obj);
elijahsj 1:8a094db1347f 127
elijahsj 1:8a094db1347f 128 /** Configure the baud rate
elijahsj 1:8a094db1347f 129 *
elijahsj 1:8a094db1347f 130 * @param obj The serial object
elijahsj 1:8a094db1347f 131 * @param baudrate The baud rate to be configured
elijahsj 1:8a094db1347f 132 */
elijahsj 1:8a094db1347f 133 void serial_baud(serial_t *obj, int baudrate);
elijahsj 1:8a094db1347f 134
elijahsj 1:8a094db1347f 135 /** Configure the format. Set the number of bits, parity and the number of stop bits
elijahsj 1:8a094db1347f 136 *
elijahsj 1:8a094db1347f 137 * @param obj The serial object
elijahsj 1:8a094db1347f 138 * @param data_bits The number of data bits
elijahsj 1:8a094db1347f 139 * @param parity The parity
elijahsj 1:8a094db1347f 140 * @param stop_bits The number of stop bits
elijahsj 1:8a094db1347f 141 */
elijahsj 1:8a094db1347f 142 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits);
elijahsj 1:8a094db1347f 143
elijahsj 1:8a094db1347f 144 /** The serial interrupt handler registration
elijahsj 1:8a094db1347f 145 *
elijahsj 1:8a094db1347f 146 * @param obj The serial object
elijahsj 1:8a094db1347f 147 * @param handler The interrupt handler which will be invoked when the interrupt fires
elijahsj 1:8a094db1347f 148 * @param id The SerialBase object
elijahsj 1:8a094db1347f 149 */
elijahsj 1:8a094db1347f 150 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id);
elijahsj 1:8a094db1347f 151
elijahsj 1:8a094db1347f 152 /** Configure serial interrupt. This function is used for word-approach
elijahsj 1:8a094db1347f 153 *
elijahsj 1:8a094db1347f 154 * @param obj The serial object
elijahsj 1:8a094db1347f 155 * @param irq The serial IRQ type (RX or TX)
elijahsj 1:8a094db1347f 156 * @param enable Set to non-zero to enable events, or zero to disable them
elijahsj 1:8a094db1347f 157 */
elijahsj 1:8a094db1347f 158 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable);
elijahsj 1:8a094db1347f 159
elijahsj 1:8a094db1347f 160 /** Get character. This is a blocking call, waiting for a character
elijahsj 1:8a094db1347f 161 *
elijahsj 1:8a094db1347f 162 * @param obj The serial object
elijahsj 1:8a094db1347f 163 */
elijahsj 1:8a094db1347f 164 int serial_getc(serial_t *obj);
elijahsj 1:8a094db1347f 165
elijahsj 1:8a094db1347f 166 /** Send a character. This is a blocking call, waiting for a peripheral to be available
elijahsj 1:8a094db1347f 167 * for writing
elijahsj 1:8a094db1347f 168 *
elijahsj 1:8a094db1347f 169 * @param obj The serial object
elijahsj 1:8a094db1347f 170 * @param c The character to be sent
elijahsj 1:8a094db1347f 171 */
elijahsj 1:8a094db1347f 172 void serial_putc(serial_t *obj, int c);
elijahsj 1:8a094db1347f 173
elijahsj 1:8a094db1347f 174 /** Check if the serial peripheral is readable
elijahsj 1:8a094db1347f 175 *
elijahsj 1:8a094db1347f 176 * @param obj The serial object
elijahsj 1:8a094db1347f 177 * @return Non-zero value if a character can be read, 0 if nothing to read
elijahsj 1:8a094db1347f 178 */
elijahsj 1:8a094db1347f 179 int serial_readable(serial_t *obj);
elijahsj 1:8a094db1347f 180
elijahsj 1:8a094db1347f 181 /** Check if the serial peripheral is writable
elijahsj 1:8a094db1347f 182 *
elijahsj 1:8a094db1347f 183 * @param obj The serial object
elijahsj 1:8a094db1347f 184 * @return Non-zero value if a character can be written, 0 otherwise.
elijahsj 1:8a094db1347f 185 */
elijahsj 1:8a094db1347f 186 int serial_writable(serial_t *obj);
elijahsj 1:8a094db1347f 187
elijahsj 1:8a094db1347f 188 /** Clear the serial peripheral
elijahsj 1:8a094db1347f 189 *
elijahsj 1:8a094db1347f 190 * @param obj The serial object
elijahsj 1:8a094db1347f 191 */
elijahsj 1:8a094db1347f 192 void serial_clear(serial_t *obj);
elijahsj 1:8a094db1347f 193
elijahsj 1:8a094db1347f 194 /** Set the break
elijahsj 1:8a094db1347f 195 *
elijahsj 1:8a094db1347f 196 * @param obj The serial object
elijahsj 1:8a094db1347f 197 */
elijahsj 1:8a094db1347f 198 void serial_break_set(serial_t *obj);
elijahsj 1:8a094db1347f 199
elijahsj 1:8a094db1347f 200 /** Clear the break
elijahsj 1:8a094db1347f 201 *
elijahsj 1:8a094db1347f 202 * @param obj The serial object
elijahsj 1:8a094db1347f 203 */
elijahsj 1:8a094db1347f 204 void serial_break_clear(serial_t *obj);
elijahsj 1:8a094db1347f 205
elijahsj 1:8a094db1347f 206 /** Configure the TX pin for UART function.
elijahsj 1:8a094db1347f 207 *
elijahsj 1:8a094db1347f 208 * @param tx The pin name used for TX
elijahsj 1:8a094db1347f 209 */
elijahsj 1:8a094db1347f 210 void serial_pinout_tx(PinName tx);
elijahsj 1:8a094db1347f 211
elijahsj 1:8a094db1347f 212 /** Configure the serial for the flow control. It sets flow control in the hardware
elijahsj 1:8a094db1347f 213 * if a serial peripheral supports it, otherwise software emulation is used.
elijahsj 1:8a094db1347f 214 *
elijahsj 1:8a094db1347f 215 * @param obj The serial object
elijahsj 1:8a094db1347f 216 * @param type The type of the flow control. Look at the available FlowControl types.
elijahsj 1:8a094db1347f 217 * @param rxflow The TX pin name
elijahsj 1:8a094db1347f 218 * @param txflow The RX pin name
elijahsj 1:8a094db1347f 219 */
elijahsj 1:8a094db1347f 220 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow);
elijahsj 1:8a094db1347f 221
elijahsj 1:8a094db1347f 222 #if DEVICE_SERIAL_ASYNCH
elijahsj 1:8a094db1347f 223
elijahsj 1:8a094db1347f 224 /**@}*/
elijahsj 1:8a094db1347f 225
elijahsj 1:8a094db1347f 226 /**
elijahsj 1:8a094db1347f 227 * \defgroup hal_AsynchSerial Asynchronous Serial Hardware Abstraction Layer
elijahsj 1:8a094db1347f 228 * @{
elijahsj 1:8a094db1347f 229 */
elijahsj 1:8a094db1347f 230
elijahsj 1:8a094db1347f 231 /** Begin asynchronous TX transfer. The used buffer is specified in the serial object,
elijahsj 1:8a094db1347f 232 * tx_buff
elijahsj 1:8a094db1347f 233 *
elijahsj 1:8a094db1347f 234 * @param obj The serial object
elijahsj 1:8a094db1347f 235 * @param tx The transmit buffer
elijahsj 1:8a094db1347f 236 * @param tx_length The number of bytes to transmit
elijahsj 1:8a094db1347f 237 * @param tx_width Deprecated argument
elijahsj 1:8a094db1347f 238 * @param handler The serial handler
elijahsj 1:8a094db1347f 239 * @param event The logical OR of events to be registered
elijahsj 1:8a094db1347f 240 * @param hint A suggestion for how to use DMA with this transfer
elijahsj 1:8a094db1347f 241 * @return Returns number of data transfered, otherwise returns 0
elijahsj 1:8a094db1347f 242 */
elijahsj 1:8a094db1347f 243 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);
elijahsj 1:8a094db1347f 244
elijahsj 1:8a094db1347f 245 /** Begin asynchronous RX transfer (enable interrupt for data collecting)
elijahsj 1:8a094db1347f 246 * The used buffer is specified in the serial object - rx_buff
elijahsj 1:8a094db1347f 247 *
elijahsj 1:8a094db1347f 248 * @param obj The serial object
elijahsj 1:8a094db1347f 249 * @param rx The receive buffer
elijahsj 1:8a094db1347f 250 * @param rx_length The number of bytes to receive
elijahsj 1:8a094db1347f 251 * @param rx_width Deprecated argument
elijahsj 1:8a094db1347f 252 * @param handler The serial handler
elijahsj 1:8a094db1347f 253 * @param event The logical OR of events to be registered
elijahsj 1:8a094db1347f 254 * @param handler The serial handler
elijahsj 1:8a094db1347f 255 * @param char_match A character in range 0-254 to be matched
elijahsj 1:8a094db1347f 256 * @param hint A suggestion for how to use DMA with this transfer
elijahsj 1:8a094db1347f 257 */
elijahsj 1:8a094db1347f 258 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);
elijahsj 1:8a094db1347f 259
elijahsj 1:8a094db1347f 260 /** Attempts to determine if the serial peripheral is already in use for TX
elijahsj 1:8a094db1347f 261 *
elijahsj 1:8a094db1347f 262 * @param obj The serial object
elijahsj 1:8a094db1347f 263 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elijahsj 1:8a094db1347f 264 */
elijahsj 1:8a094db1347f 265 uint8_t serial_tx_active(serial_t *obj);
elijahsj 1:8a094db1347f 266
elijahsj 1:8a094db1347f 267 /** Attempts to determine if the serial peripheral is already in use for RX
elijahsj 1:8a094db1347f 268 *
elijahsj 1:8a094db1347f 269 * @param obj The serial object
elijahsj 1:8a094db1347f 270 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elijahsj 1:8a094db1347f 271 */
elijahsj 1:8a094db1347f 272 uint8_t serial_rx_active(serial_t *obj);
elijahsj 1:8a094db1347f 273
elijahsj 1:8a094db1347f 274 /** The asynchronous TX and RX handler.
elijahsj 1:8a094db1347f 275 *
elijahsj 1:8a094db1347f 276 * @param obj The serial object
elijahsj 1:8a094db1347f 277 * @return Returns event flags if an RX transfer termination condition was met; otherwise returns 0
elijahsj 1:8a094db1347f 278 */
elijahsj 1:8a094db1347f 279 int serial_irq_handler_asynch(serial_t *obj);
elijahsj 1:8a094db1347f 280
elijahsj 1:8a094db1347f 281 /** Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elijahsj 1:8a094db1347f 282 * flushes the TX hardware buffer if TX FIFO is used
elijahsj 1:8a094db1347f 283 *
elijahsj 1:8a094db1347f 284 * @param obj The serial object
elijahsj 1:8a094db1347f 285 */
elijahsj 1:8a094db1347f 286 void serial_tx_abort_asynch(serial_t *obj);
elijahsj 1:8a094db1347f 287
elijahsj 1:8a094db1347f 288 /** Abort the ongoing RX transaction. It disables the enabled interrupt for RX and
elijahsj 1:8a094db1347f 289 * flushes the RX hardware buffer if RX FIFO is used
elijahsj 1:8a094db1347f 290 *
elijahsj 1:8a094db1347f 291 * @param obj The serial object
elijahsj 1:8a094db1347f 292 */
elijahsj 1:8a094db1347f 293 void serial_rx_abort_asynch(serial_t *obj);
elijahsj 1:8a094db1347f 294
elijahsj 1:8a094db1347f 295 /**@}*/
elijahsj 1:8a094db1347f 296
elijahsj 1:8a094db1347f 297 #endif
elijahsj 1:8a094db1347f 298
elijahsj 1:8a094db1347f 299 #ifdef __cplusplus
elijahsj 1:8a094db1347f 300 }
elijahsj 1:8a094db1347f 301 #endif
elijahsj 1:8a094db1347f 302
elijahsj 1:8a094db1347f 303 #endif
elijahsj 1:8a094db1347f 304
elijahsj 1:8a094db1347f 305 #endif
elijahsj 1:8a094db1347f 306
elijahsj 1:8a094db1347f 307 /** @}*/