mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

platform/ATCmdParser.h@188:bcfe06ba3d64, 2018-11-08 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 08 11:46:34 2018 +0000
Revision:
188:bcfe06ba3d64
Parent:
187:0387e8f68319
Child:
189:f392fc9709a3
mbed-dev library. Release version 164

Who changed what in which revision?

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AnnaBridge 167:e84263d55307 1 /* Copyright (c) 2017 ARM Limited
AnnaBridge 167:e84263d55307 2 *
AnnaBridge 167:e84263d55307 3 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 167:e84263d55307 4 * you may not use this file except in compliance with the License.
AnnaBridge 167:e84263d55307 5 * You may obtain a copy of the License at
AnnaBridge 167:e84263d55307 6 *
AnnaBridge 167:e84263d55307 7 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 167:e84263d55307 8 *
AnnaBridge 167:e84263d55307 9 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 167:e84263d55307 10 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 167:e84263d55307 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 167:e84263d55307 12 * See the License for the specific language governing permissions and
AnnaBridge 167:e84263d55307 13 * limitations under the License.
AnnaBridge 167:e84263d55307 14 *
AnnaBridge 167:e84263d55307 15 * @section DESCRIPTION
AnnaBridge 167:e84263d55307 16 *
AnnaBridge 167:e84263d55307 17 * Parser for the AT command syntax
AnnaBridge 167:e84263d55307 18 *
AnnaBridge 167:e84263d55307 19 */
AnnaBridge 167:e84263d55307 20 #ifndef MBED_ATCMDPARSER_H
AnnaBridge 167:e84263d55307 21 #define MBED_ATCMDPARSER_H
AnnaBridge 167:e84263d55307 22
AnnaBridge 167:e84263d55307 23 #include "mbed.h"
AnnaBridge 167:e84263d55307 24 #include <cstdarg>
AnnaBridge 167:e84263d55307 25 #include "Callback.h"
AnnaBridge 167:e84263d55307 26
AnnaBridge 178:79309dc6340a 27 namespace mbed {
AnnaBridge 178:79309dc6340a 28
AnnaBridge 178:79309dc6340a 29 /** \addtogroup platform */
AnnaBridge 178:79309dc6340a 30 /** @{*/
AnnaBridge 178:79309dc6340a 31 /**
AnnaBridge 178:79309dc6340a 32 * \defgroup platform_ATCmdParser ATCmdParser class
AnnaBridge 178:79309dc6340a 33 * @{
AnnaBridge 178:79309dc6340a 34 */
AnnaBridge 178:79309dc6340a 35
AnnaBridge 167:e84263d55307 36 /**
AnnaBridge 167:e84263d55307 37 * Parser class for parsing AT commands
AnnaBridge 167:e84263d55307 38 *
AnnaBridge 167:e84263d55307 39 * Here are some examples:
AnnaBridge 167:e84263d55307 40 * @code
Kojto 170:19eb464bc2be 41 * UARTSerial serial = UARTSerial(D1, D0);
Kojto 170:19eb464bc2be 42 * ATCmdParser at = ATCmdParser(&serial, "\r\n");
AnnaBridge 167:e84263d55307 43 * int value;
AnnaBridge 167:e84263d55307 44 * char buffer[100];
AnnaBridge 167:e84263d55307 45 *
AnnaBridge 167:e84263d55307 46 * at.send("AT") && at.recv("OK");
AnnaBridge 167:e84263d55307 47 * at.send("AT+CWMODE=%d", 3) && at.recv("OK");
AnnaBridge 167:e84263d55307 48 * at.send("AT+CWMODE?") && at.recv("+CWMODE:%d\r\nOK", &value);
AnnaBridge 167:e84263d55307 49 * at.recv("+IPD,%d:", &value);
AnnaBridge 167:e84263d55307 50 * at.read(buffer, value);
AnnaBridge 167:e84263d55307 51 * at.recv("OK");
AnnaBridge 167:e84263d55307 52 * @endcode
AnnaBridge 167:e84263d55307 53 */
AnnaBridge 167:e84263d55307 54
AnnaBridge 187:0387e8f68319 55 class ATCmdParser : private NonCopyable<ATCmdParser> {
AnnaBridge 167:e84263d55307 56 private:
AnnaBridge 167:e84263d55307 57 // File handle
AnnaBridge 167:e84263d55307 58 // Not owned by ATCmdParser
AnnaBridge 167:e84263d55307 59 FileHandle *_fh;
AnnaBridge 167:e84263d55307 60
AnnaBridge 167:e84263d55307 61 int _buffer_size;
AnnaBridge 167:e84263d55307 62 char *_buffer;
AnnaBridge 167:e84263d55307 63 int _timeout;
AnnaBridge 167:e84263d55307 64
AnnaBridge 167:e84263d55307 65 // Parsing information
AnnaBridge 167:e84263d55307 66 const char *_output_delimiter;
AnnaBridge 167:e84263d55307 67 int _output_delim_size;
AnnaBridge 188:bcfe06ba3d64 68 int _oob_cb_count;
AnnaBridge 167:e84263d55307 69 char _in_prev;
AnnaBridge 167:e84263d55307 70 bool _dbg_on;
AnnaBridge 167:e84263d55307 71 bool _aborted;
AnnaBridge 167:e84263d55307 72
AnnaBridge 167:e84263d55307 73 struct oob {
AnnaBridge 167:e84263d55307 74 unsigned len;
AnnaBridge 167:e84263d55307 75 const char *prefix;
AnnaBridge 167:e84263d55307 76 mbed::Callback<void()> cb;
AnnaBridge 167:e84263d55307 77 oob *next;
AnnaBridge 167:e84263d55307 78 };
AnnaBridge 167:e84263d55307 79 oob *_oobs;
AnnaBridge 167:e84263d55307 80
AnnaBridge 167:e84263d55307 81 public:
AnnaBridge 167:e84263d55307 82
AnnaBridge 167:e84263d55307 83 /**
AnnaBridge 167:e84263d55307 84 * Constructor
AnnaBridge 167:e84263d55307 85 *
AnnaBridge 188:bcfe06ba3d64 86 * @param fh A FileHandle to the digital interface, used for AT commands
AnnaBridge 188:bcfe06ba3d64 87 * @param output_delimiter End of command-line termination
AnnaBridge 188:bcfe06ba3d64 88 * @param buffer_size Size of internal buffer for transaction
AnnaBridge 188:bcfe06ba3d64 89 * @param timeout Timeout of the connection
AnnaBridge 188:bcfe06ba3d64 90 * @param debug Turns on/off debug output for AT commands
AnnaBridge 167:e84263d55307 91 */
AnnaBridge 167:e84263d55307 92 ATCmdParser(FileHandle *fh, const char *output_delimiter = "\r",
AnnaBridge 187:0387e8f68319 93 int buffer_size = 256, int timeout = 8000, bool debug = false)
AnnaBridge 188:bcfe06ba3d64 94 : _fh(fh), _buffer_size(buffer_size), _oob_cb_count(0), _in_prev(0), _oobs(NULL)
AnnaBridge 167:e84263d55307 95 {
AnnaBridge 167:e84263d55307 96 _buffer = new char[buffer_size];
AnnaBridge 167:e84263d55307 97 set_timeout(timeout);
AnnaBridge 167:e84263d55307 98 set_delimiter(output_delimiter);
AnnaBridge 167:e84263d55307 99 debug_on(debug);
AnnaBridge 167:e84263d55307 100 }
AnnaBridge 167:e84263d55307 101
AnnaBridge 167:e84263d55307 102 /**
AnnaBridge 167:e84263d55307 103 * Destructor
AnnaBridge 167:e84263d55307 104 */
AnnaBridge 167:e84263d55307 105 ~ATCmdParser()
AnnaBridge 167:e84263d55307 106 {
AnnaBridge 167:e84263d55307 107 while (_oobs) {
AnnaBridge 167:e84263d55307 108 struct oob *oob = _oobs;
AnnaBridge 167:e84263d55307 109 _oobs = oob->next;
AnnaBridge 167:e84263d55307 110 delete oob;
AnnaBridge 167:e84263d55307 111 }
AnnaBridge 167:e84263d55307 112 delete[] _buffer;
AnnaBridge 167:e84263d55307 113 }
AnnaBridge 167:e84263d55307 114
AnnaBridge 167:e84263d55307 115 /**
AnnaBridge 167:e84263d55307 116 * Allows timeout to be changed between commands
AnnaBridge 167:e84263d55307 117 *
AnnaBridge 188:bcfe06ba3d64 118 * @param timeout ATCmdParser APIs (read/write/send/recv ..etc) throw an
AnnaBridge 188:bcfe06ba3d64 119 * error if no response is received in `timeout` duration
AnnaBridge 167:e84263d55307 120 */
AnnaBridge 167:e84263d55307 121 void set_timeout(int timeout)
AnnaBridge 167:e84263d55307 122 {
AnnaBridge 167:e84263d55307 123 _timeout = timeout;
AnnaBridge 167:e84263d55307 124 }
AnnaBridge 167:e84263d55307 125
AnnaBridge 167:e84263d55307 126 /**
AnnaBridge 188:bcfe06ba3d64 127 * For backward compatibility.
AnnaBridge 184:08ed48f1de7f 128 * @deprecated Do not use this function. This function has been replaced with set_timeout for consistency.
AnnaBridge 167:e84263d55307 129 *
AnnaBridge 167:e84263d55307 130 * Please use set_timeout(int) API only from now on.
AnnaBridge 167:e84263d55307 131 * Allows timeout to be changed between commands
AnnaBridge 167:e84263d55307 132 *
AnnaBridge 188:bcfe06ba3d64 133 * @param timeout ATCmdParser APIs (read/write/send/recv ..etc) throw an
AnnaBridge 188:bcfe06ba3d64 134 * error if no response is received in `timeout` duration
AnnaBridge 188:bcfe06ba3d64 135 *
AnnaBridge 167:e84263d55307 136 */
AnnaBridge 167:e84263d55307 137 MBED_DEPRECATED_SINCE("mbed-os-5.5.0", "Replaced with set_timeout for consistency")
AnnaBridge 167:e84263d55307 138 void setTimeout(int timeout)
AnnaBridge 167:e84263d55307 139 {
AnnaBridge 167:e84263d55307 140 set_timeout(timeout);
AnnaBridge 167:e84263d55307 141 }
AnnaBridge 167:e84263d55307 142
AnnaBridge 167:e84263d55307 143 /**
AnnaBridge 167:e84263d55307 144 * Sets string of characters to use as line delimiters
AnnaBridge 167:e84263d55307 145 *
AnnaBridge 188:bcfe06ba3d64 146 * @param output_delimiter String of characters to use as line delimiters
AnnaBridge 167:e84263d55307 147 */
AnnaBridge 167:e84263d55307 148 void set_delimiter(const char *output_delimiter)
AnnaBridge 167:e84263d55307 149 {
AnnaBridge 167:e84263d55307 150 _output_delimiter = output_delimiter;
AnnaBridge 167:e84263d55307 151 _output_delim_size = strlen(output_delimiter);
AnnaBridge 167:e84263d55307 152 }
AnnaBridge 167:e84263d55307 153
AnnaBridge 167:e84263d55307 154 /**
AnnaBridge 167:e84263d55307 155 * For backwards compatibility.
AnnaBridge 184:08ed48f1de7f 156 * @deprecated Do not use this function. This function has been replaced with set_delimiter for consistency.
AnnaBridge 167:e84263d55307 157 *
AnnaBridge 167:e84263d55307 158 * Please use set_delimiter(const char *) API only from now on.
AnnaBridge 167:e84263d55307 159 * Sets string of characters to use as line delimiters
AnnaBridge 167:e84263d55307 160 *
AnnaBridge 167:e84263d55307 161 * @param output_delimiter string of characters to use as line delimiters
AnnaBridge 167:e84263d55307 162 */
AnnaBridge 167:e84263d55307 163 MBED_DEPRECATED_SINCE("mbed-os-5.5.0", "Replaced with set_delimiter for consistency")
AnnaBridge 167:e84263d55307 164 void setDelimiter(const char *output_delimiter)
AnnaBridge 167:e84263d55307 165 {
AnnaBridge 167:e84263d55307 166 set_delimiter(output_delimiter);
AnnaBridge 167:e84263d55307 167 }
AnnaBridge 167:e84263d55307 168
AnnaBridge 167:e84263d55307 169 /**
AnnaBridge 167:e84263d55307 170 * Allows traces from modem to be turned on or off
AnnaBridge 167:e84263d55307 171 *
AnnaBridge 188:bcfe06ba3d64 172 * @param on Set as 1 to turn on traces and vice versa.
AnnaBridge 167:e84263d55307 173 */
AnnaBridge 167:e84263d55307 174 void debug_on(uint8_t on)
AnnaBridge 167:e84263d55307 175 {
AnnaBridge 167:e84263d55307 176 _dbg_on = (on) ? 1 : 0;
AnnaBridge 167:e84263d55307 177 }
AnnaBridge 167:e84263d55307 178
AnnaBridge 167:e84263d55307 179 /**
AnnaBridge 188:bcfe06ba3d64 180 * For backward compatibility.
AnnaBridge 184:08ed48f1de7f 181 * @deprecated Do not use this function. This function has been replaced with debug_on for consistency.
AnnaBridge 167:e84263d55307 182 *
AnnaBridge 167:e84263d55307 183 * Allows traces from modem to be turned on or off
AnnaBridge 167:e84263d55307 184 *
AnnaBridge 188:bcfe06ba3d64 185 * @param on Set as 1 to turn on traces and vice versa.
AnnaBridge 167:e84263d55307 186 */
AnnaBridge 167:e84263d55307 187 MBED_DEPRECATED_SINCE("mbed-os-5.5.0", "Replaced with debug_on for consistency")
AnnaBridge 167:e84263d55307 188 void debugOn(uint8_t on)
AnnaBridge 167:e84263d55307 189 {
AnnaBridge 167:e84263d55307 190 debug_on(on);
AnnaBridge 167:e84263d55307 191 }
AnnaBridge 167:e84263d55307 192
AnnaBridge 167:e84263d55307 193 /**
AnnaBridge 167:e84263d55307 194 * Sends an AT command
AnnaBridge 167:e84263d55307 195 *
AnnaBridge 167:e84263d55307 196 * Sends a formatted command using printf style formatting
AnnaBridge 167:e84263d55307 197 * @see printf
AnnaBridge 167:e84263d55307 198 *
AnnaBridge 167:e84263d55307 199 * @param command printf-like format string of command to send which
AnnaBridge 167:e84263d55307 200 * is appended with a newline
AnnaBridge 167:e84263d55307 201 * @param ... all printf-like arguments to insert into command
AnnaBridge 167:e84263d55307 202 * @return true only if command is successfully sent
AnnaBridge 167:e84263d55307 203 */
AnnaBridge 187:0387e8f68319 204 bool send(const char *command, ...) MBED_PRINTF_METHOD(1, 2);
AnnaBridge 167:e84263d55307 205
AnnaBridge 167:e84263d55307 206 bool vsend(const char *command, va_list args);
AnnaBridge 167:e84263d55307 207
AnnaBridge 167:e84263d55307 208 /**
AnnaBridge 167:e84263d55307 209 * Receive an AT response
AnnaBridge 167:e84263d55307 210 *
AnnaBridge 167:e84263d55307 211 * Receives a formatted response using scanf style formatting
AnnaBridge 167:e84263d55307 212 * @see scanf
AnnaBridge 167:e84263d55307 213 *
AnnaBridge 167:e84263d55307 214 * Responses are parsed line at a time.
AnnaBridge 167:e84263d55307 215 * Any received data that does not match the response is ignored until
AnnaBridge 167:e84263d55307 216 * a timeout occurs.
AnnaBridge 167:e84263d55307 217 *
AnnaBridge 167:e84263d55307 218 * @param response scanf-like format string of response to expect
AnnaBridge 167:e84263d55307 219 * @param ... all scanf-like arguments to extract from response
AnnaBridge 167:e84263d55307 220 * @return true only if response is successfully matched
AnnaBridge 167:e84263d55307 221 */
AnnaBridge 187:0387e8f68319 222 bool recv(const char *response, ...) MBED_SCANF_METHOD(1, 2);
AnnaBridge 167:e84263d55307 223
AnnaBridge 167:e84263d55307 224 bool vrecv(const char *response, va_list args);
AnnaBridge 167:e84263d55307 225
AnnaBridge 167:e84263d55307 226 /**
AnnaBridge 167:e84263d55307 227 * Write a single byte to the underlying stream
AnnaBridge 167:e84263d55307 228 *
AnnaBridge 167:e84263d55307 229 * @param c The byte to write
AnnaBridge 167:e84263d55307 230 * @return The byte that was written or -1 during a timeout
AnnaBridge 167:e84263d55307 231 */
AnnaBridge 167:e84263d55307 232 int putc(char c);
AnnaBridge 167:e84263d55307 233
AnnaBridge 167:e84263d55307 234 /**
AnnaBridge 167:e84263d55307 235 * Get a single byte from the underlying stream
AnnaBridge 167:e84263d55307 236 *
AnnaBridge 167:e84263d55307 237 * @return The byte that was read or -1 during a timeout
AnnaBridge 167:e84263d55307 238 */
AnnaBridge 167:e84263d55307 239 int getc();
AnnaBridge 167:e84263d55307 240
AnnaBridge 167:e84263d55307 241 /**
AnnaBridge 167:e84263d55307 242 * Write an array of bytes to the underlying stream
AnnaBridge 167:e84263d55307 243 *
AnnaBridge 188:bcfe06ba3d64 244 * @param data The array of bytes to write
AnnaBridge 188:bcfe06ba3d64 245 * @param size Number of bytes to write
AnnaBridge 167:e84263d55307 246 * @return number of bytes written or -1 on failure
AnnaBridge 167:e84263d55307 247 */
AnnaBridge 167:e84263d55307 248 int write(const char *data, int size);
AnnaBridge 167:e84263d55307 249
AnnaBridge 167:e84263d55307 250 /**
AnnaBridge 167:e84263d55307 251 * Read an array of bytes from the underlying stream
AnnaBridge 167:e84263d55307 252 *
AnnaBridge 188:bcfe06ba3d64 253 * @param data The buffer for filling the read bytes
AnnaBridge 188:bcfe06ba3d64 254 * @param size Number of bytes to read
AnnaBridge 167:e84263d55307 255 * @return number of bytes read or -1 on failure
AnnaBridge 167:e84263d55307 256 */
AnnaBridge 167:e84263d55307 257 int read(char *data, int size);
AnnaBridge 167:e84263d55307 258
AnnaBridge 167:e84263d55307 259 /**
AnnaBridge 167:e84263d55307 260 * Direct printf to underlying stream
AnnaBridge 167:e84263d55307 261 * @see printf
AnnaBridge 167:e84263d55307 262 *
AnnaBridge 188:bcfe06ba3d64 263 * @param format Format string to pass to printf
AnnaBridge 188:bcfe06ba3d64 264 * @param ... Variable arguments to printf
AnnaBridge 167:e84263d55307 265 * @return number of bytes written or -1 on failure
AnnaBridge 167:e84263d55307 266 */
AnnaBridge 187:0387e8f68319 267 int printf(const char *format, ...) MBED_PRINTF_METHOD(1, 2);
AnnaBridge 167:e84263d55307 268
AnnaBridge 167:e84263d55307 269 int vprintf(const char *format, va_list args);
AnnaBridge 167:e84263d55307 270
AnnaBridge 167:e84263d55307 271 /**
AnnaBridge 167:e84263d55307 272 * Direct scanf on underlying stream
AnnaBridge 167:e84263d55307 273 * @see scanf
AnnaBridge 167:e84263d55307 274 *
AnnaBridge 188:bcfe06ba3d64 275 * @param format Format string to pass to scanf
AnnaBridge 188:bcfe06ba3d64 276 * @param ... Variable arguments to scanf
AnnaBridge 167:e84263d55307 277 * @return number of bytes read or -1 on failure
AnnaBridge 167:e84263d55307 278 */
AnnaBridge 187:0387e8f68319 279 int scanf(const char *format, ...) MBED_SCANF_METHOD(1, 2);
AnnaBridge 167:e84263d55307 280
AnnaBridge 167:e84263d55307 281 int vscanf(const char *format, va_list args);
AnnaBridge 167:e84263d55307 282
AnnaBridge 167:e84263d55307 283 /**
AnnaBridge 167:e84263d55307 284 * Attach a callback for out-of-band data
AnnaBridge 167:e84263d55307 285 *
AnnaBridge 188:bcfe06ba3d64 286 * @param prefix String on when to initiate callback
AnnaBridge 188:bcfe06ba3d64 287 * @param func Callback to call when string is read
AnnaBridge 167:e84263d55307 288 * @note out-of-band data is only processed during a scanf call
AnnaBridge 167:e84263d55307 289 */
AnnaBridge 167:e84263d55307 290 void oob(const char *prefix, mbed::Callback<void()> func);
AnnaBridge 167:e84263d55307 291
AnnaBridge 167:e84263d55307 292 /**
AnnaBridge 167:e84263d55307 293 * Flushes the underlying stream
AnnaBridge 167:e84263d55307 294 */
AnnaBridge 167:e84263d55307 295 void flush();
AnnaBridge 167:e84263d55307 296
AnnaBridge 167:e84263d55307 297 /**
AnnaBridge 167:e84263d55307 298 * Abort current recv
AnnaBridge 167:e84263d55307 299 *
AnnaBridge 188:bcfe06ba3d64 300 * Can be called from out-of-band handler to interrupt the current
AnnaBridge 167:e84263d55307 301 * recv operation.
AnnaBridge 167:e84263d55307 302 */
AnnaBridge 167:e84263d55307 303 void abort();
AnnaBridge 187:0387e8f68319 304
AnnaBridge 176:447f873cad2f 305 /**
AnnaBridge 176:447f873cad2f 306 * Process out-of-band data
AnnaBridge 176:447f873cad2f 307 *
AnnaBridge 176:447f873cad2f 308 * Process out-of-band data in the receive buffer. This function
AnnaBridge 176:447f873cad2f 309 * returns immediately if there is no data to process.
AnnaBridge 176:447f873cad2f 310 *
AnnaBridge 188:bcfe06ba3d64 311 * @return true if out-of-band data processed, false otherwise
AnnaBridge 176:447f873cad2f 312 */
AnnaBridge 176:447f873cad2f 313 bool process_oob(void);
AnnaBridge 167:e84263d55307 314 };
AnnaBridge 178:79309dc6340a 315
AnnaBridge 178:79309dc6340a 316 /**@}*/
AnnaBridge 178:79309dc6340a 317
AnnaBridge 178:79309dc6340a 318 /**@}*/
AnnaBridge 178:79309dc6340a 319
AnnaBridge 167:e84263d55307 320 } //namespace mbed
AnnaBridge 167:e84263d55307 321
AnnaBridge 167:e84263d55307 322 #endif //MBED_ATCMDPARSER_H