涂 桂旺 / ATParser

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Dependencies:   BufferedSerial

Fork of ATParser by Components

ATParser.h@1:66a14afe650a, 2015-07-16 (annotated)

Committer:
geky
Date:
Thu Jul 16 20:42:44 2015 +0000
Revision:
1:66a14afe650a
Parent:
0:c741e144517c
Child:
2:4d68f546861c
Worked around scanf's lack of error reporting; ; This required a rather roundabout method of performing two scanf passes, one with clobbered matches %n, and the other with the actual value matches.; ; Also the parser now scans multiple lines.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
geky 0:c741e144517c 1 /* Copyright (c) 2015 ARM Limited
geky 0:c741e144517c 2 *
geky 0:c741e144517c 3 * Licensed under the Apache License, Version 2.0 (the "License");
geky 0:c741e144517c 4 * you may not use this file except in compliance with the License.
geky 0:c741e144517c 5 * You may obtain a copy of the License at
geky 0:c741e144517c 6 *
geky 0:c741e144517c 7 * http://www.apache.org/licenses/LICENSE-2.0
geky 0:c741e144517c 8 *
geky 0:c741e144517c 9 * Unless required by applicable law or agreed to in writing, software
geky 0:c741e144517c 10 * distributed under the License is distributed on an "AS IS" BASIS,
geky 0:c741e144517c 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
geky 0:c741e144517c 12 * See the License for the specific language governing permissions and
geky 0:c741e144517c 13 * limitations under the License.
geky 0:c741e144517c 14 *
geky 0:c741e144517c 15 * @section DESCRIPTION
geky 0:c741e144517c 16 *
geky 0:c741e144517c 17 * Parser for the AT command syntax
geky 0:c741e144517c 18 *
geky 0:c741e144517c 19 */
geky 0:c741e144517c 20
geky 0:c741e144517c 21 #include "mbed.h"
geky 1:66a14afe650a 22 #include <stdarg.h>
geky 1:66a14afe650a 23
geky 1:66a14afe650a 24 #include "BufferedSerial.h"
geky 0:c741e144517c 25
geky 0:c741e144517c 26
geky 0:c741e144517c 27 /**
geky 0:c741e144517c 28 * The ATParser class wraps information about the serial in use
geky 0:c741e144517c 29 */
geky 0:c741e144517c 30 class ATParser {
geky 0:c741e144517c 31 private:
geky 0:c741e144517c 32 // Serial information
geky 1:66a14afe650a 33 BufferedSerial *_serial;
geky 0:c741e144517c 34 int _buffer_size;
geky 0:c741e144517c 35 char *_buffer;
geky 0:c741e144517c 36 int _timeout;
geky 0:c741e144517c 37
geky 0:c741e144517c 38 // Helper methods for putc/getc with timeout
geky 0:c741e144517c 39 int _putc(char c);
geky 0:c741e144517c 40 int _getc();
geky 0:c741e144517c 41
geky 0:c741e144517c 42 // Flush used to clear serial connection
geky 0:c741e144517c 43 void _flush();
geky 0:c741e144517c 44
geky 0:c741e144517c 45 // Helper methods for reading/writing lines with
geky 0:c741e144517c 46 // timeout and buffer limitations
geky 0:c741e144517c 47 bool _putline(const char *line);
geky 1:66a14afe650a 48 bool _getline(char *line, int size);
geky 0:c741e144517c 49
geky 0:c741e144517c 50 public:
geky 0:c741e144517c 51 /**
geky 0:c741e144517c 52 * Constructor
geky 0:c741e144517c 53 *
geky 0:c741e144517c 54 * @param serial serial interface to use for AT commands
geky 1:66a14afe650a 55 * @param buffer_size size of internal buffer for transaction
geky 0:c741e144517c 56 * @param timeout timeout of the connection
geky 1:66a14afe650a 57 * @param echo flag to indicate if an echo of sent characters should be expected
geky 0:c741e144517c 58 */
geky 1:66a14afe650a 59 ATParser(BufferedSerial *serial, int buffer_size = 256, int timeout = 3000) :
geky 0:c741e144517c 60 _serial(serial),
geky 0:c741e144517c 61 _buffer_size(buffer_size),
geky 0:c741e144517c 62 _timeout(timeout) {
geky 0:c741e144517c 63 _buffer = new char[buffer_size];
geky 0:c741e144517c 64 }
geky 0:c741e144517c 65
geky 0:c741e144517c 66 /**
geky 0:c741e144517c 67 * Destructor
geky 0:c741e144517c 68 */
geky 0:c741e144517c 69 ~ATParser() {
geky 0:c741e144517c 70 delete [] _buffer;
geky 0:c741e144517c 71 }
geky 0:c741e144517c 72
geky 0:c741e144517c 73 /**
geky 0:c741e144517c 74 * Allows timeout to be changed between commands
geky 0:c741e144517c 75 *
geky 0:c741e144517c 76 * @param timeout timeout of the connection
geky 0:c741e144517c 77 */
geky 0:c741e144517c 78 void setTimeout(int timeout) {
geky 0:c741e144517c 79 _timeout = timeout;
geky 0:c741e144517c 80 }
geky 0:c741e144517c 81
geky 0:c741e144517c 82 /**
geky 0:c741e144517c 83 * Issue AT commands with specified command and expected response
geky 1:66a14afe650a 84 * Uses printf/scanf like format strings to be able to parse the results
geky 1:66a14afe650a 85 *
geky 1:66a14afe650a 86 * Here are some examples:
geky 1:66a14afe650a 87 * @code
geky 1:66a14afe650a 88 * at.command("AT", "OK");
geky 1:66a14afe650a 89 * at.command("AT+CWMODE=%d", "OK", 3);
geky 1:66a14afe650a 90 * at.command("AT+CWMODE?", "+CWMODE:%d OK", &result);
geky 1:66a14afe650a 91 * @endcode
geky 0:c741e144517c 92 *
geky 0:c741e144517c 93 * @param command printf-like format string of command to send
geky 0:c741e144517c 94 * @param response scanf-like format string of response to parse
geky 0:c741e144517c 95 * @param ... all printf-like arguments to insert into command followed by
geky 0:c741e144517c 96 * all scanf-like pointers to destinations for response values
geky 1:66a14afe650a 97 * @return true only if response is successfully matched
geky 0:c741e144517c 98 */
geky 0:c741e144517c 99 bool command(const char *command, const char *response, ...);
geky 0:c741e144517c 100 };
geky 1:66a14afe650a 101