Diff: esp8266-driver/ESP8266/ATParser/ATParser.h

Revision:

0:478cfd88041f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/esp8266-driver/ESP8266/ATParser/ATParser.h	Wed Apr 19 01:08:11 2017 +0000
@@ -0,0 +1,234 @@
+/* Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @section DESCRIPTION
+ *
+ * Parser for the AT command syntax
+ *
+ */
+#ifndef AT_PARSER_H
+#define AT_PARSER_H
+
+#include "mbed.h"
+#include <cstdarg>
+#include <vector>
+#include "BufferedSerial.h"
+#include "Callback.h"
+
+
+/**
+* Parser class for parsing AT commands
+*
+* Here are some examples:
+* @code
+* ATParser at = ATParser(serial, "\r\n");
+* int value;
+* char buffer[100];
+*
+* at.send("AT") && at.recv("OK");
+* at.send("AT+CWMODE=%d", 3) && at.recv("OK");
+* at.send("AT+CWMODE?") && at.recv("+CWMODE:%d\r\nOK", &value);
+* at.recv("+IPD,%d:", &value);
+* at.read(buffer, value);
+* at.recv("OK");
+* @endcode
+*/
+class ATParser
+{
+private:
+    // Serial information
+    BufferedSerial *_serial;
+    int _buffer_size;
+    char *_buffer;
+    int _timeout;
+
+    // Parsing information
+    const char *_delimiter;
+    int _delim_size;
+    bool dbg_on;
+
+    struct oob {
+        unsigned len;
+        const char *prefix;
+        mbed::Callback<void()> cb;
+    };
+    std::vector<oob> _oobs;
+
+public:
+    /**
+    * Constructor
+    *
+    * @param serial serial interface to use for AT commands
+    * @param buffer_size size of internal buffer for transaction
+    * @param timeout timeout of the connection
+    * @param delimiter string of characters to use as line delimiters
+    */
+    ATParser(BufferedSerial &serial, const char *delimiter = "\r\n", int buffer_size = 256, int timeout = 8000, bool debug = false) :
+        _serial(&serial),
+        _buffer_size(buffer_size) {
+        _buffer = new char[buffer_size];
+        setTimeout(timeout);
+        setDelimiter(delimiter);
+        debugOn(debug);
+    }
+
+    /**
+    * Destructor
+    */
+    ~ATParser() {
+        delete [] _buffer;
+    }
+
+    /**
+    * Allows timeout to be changed between commands
+    *
+    * @param timeout timeout of the connection
+    */
+    void setTimeout(int timeout) {
+        _timeout = timeout;
+    }
+
+    /**
+    * Sets string of characters to use as line delimiters
+    *
+    * @param delimiter string of characters to use as line delimiters
+    */
+    void setDelimiter(const char *delimiter) {
+        _delimiter = delimiter;
+        _delim_size = strlen(delimiter);
+    }
+    
+    /**
+    * Allows echo to be on or off
+    *
+    * @param echo 1 for echo and 0 turns it off
+    */
+    void debugOn(uint8_t on) {
+        dbg_on = (on) ? 1 : 0;
+    }
+
+    /**
+    * Sends an AT command
+    *
+    * Sends a formatted command using printf style formatting
+    * @see ::printf
+    *
+    * @param command printf-like format string of command to send which
+    *                is appended with the specified delimiter
+    * @param ... all printf-like arguments to insert into command
+    * @return true only if command is successfully sent
+    */
+    bool send(const char *command, ...);
+    bool vsend(const char *command, va_list args);
+
+    /**
+    * Recieve an AT response
+    *
+    * Recieves a formatted response using scanf style formatting
+    * @see ::scanf
+    *
+    * Responses are parsed line at a time using the specified delimiter.
+    * Any recieved data that does not match the response is ignored until
+    * a timeout occurs.
+    *
+    * @param response scanf-like format string of response to expect
+    * @param ... all scanf-like arguments to extract from response
+    * @return true only if response is successfully matched
+    */
+    bool recv(const char *response, ...);
+    bool vrecv(const char *response, va_list args);
+
+    /**
+    * Write a single byte to the underlying stream
+    *
+    * @param c The byte to write
+    * @return The byte that was written or -1 during a timeout
+    */
+    int putc(char c);
+
+    /**
+    * Get a single byte from the underlying stream
+    *
+    * @return The byte that was read or -1 during a timeout
+    */
+    int getc();
+
+    /**
+    * Write an array of bytes to the underlying stream
+    *
+    * @param data the array of bytes to write
+    * @param size number of bytes to write
+    * @return number of bytes written or -1 on failure
+    */
+    int write(const char *data, int size);
+
+    /**
+    * Read an array of bytes from the underlying stream
+    *
+    * @param data the destination for the read bytes
+    * @param size number of bytes to read
+    * @return number of bytes read or -1 on failure
+    */
+    int read(char *data, int size);
+
+    /**
+    * Direct printf to underlying stream
+    * @see ::printf
+    *
+    * @param format format string to pass to printf
+    * @param ... arguments to printf
+    * @return number of bytes written or -1 on failure
+    */
+    int printf(const char *format, ...);
+    int vprintf(const char *format, va_list args);
+
+    /**
+    * Direct scanf on underlying stream
+    * @see ::scanf
+    *
+    * @param format format string to pass to scanf
+    * @param ... arguments to scanf
+    * @return number of bytes read or -1 on failure
+    */
+    int scanf(const char *format, ...);
+    int vscanf(const char *format, va_list args);
+
+    /**
+    * Attach a callback for out-of-band data
+    * 
+    * @param prefix string on when to initiate callback
+    * @param func callback to call when string is read
+    * @note out-of-band data is only processed during a scanf call
+    */
+    void oob(const char *prefix, mbed::Callback<void()> func);
+
+    /**
+    * Attach a callback for out-of-band data
+    *
+    * @param prefix string on when to initiate callback
+    * @param obj pointer to object to call member function on
+    * @param method callback to call when string is read
+    * @note out-of-band data is only processed during a scanf call
+    */
+    template <typename T, typename M>
+    void oob(const char *prefix, T *obj, M method) {
+        return oob(prefix, mbed::Callback<void()>(obj, method));
+    }
+
+    /**
+    * Flushes the underlying stream
+    */
+    void flush();
+};
+#endif