File content as of revision 0:214db1fdfc95:

/*
  modem.h
  2014 Copyright (c) Seeed Technology Inc.  All right reserved.

  Author:lawliet zou(lawliet.zou@gmail.com)
  2014-2-24

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef __MODEM_H__
#define __MODEM_H__

#include "mbed.h"

#define DEFAULT_TIMEOUT   	5

enum DataType {
    CMD		= 0,
    DATA	= 1,
};

/** Modem class.
 *  Used for Modem communication. attention that Modem module communicate with MCU in serial protocol
 */
class Modem
{

public:
    /**	Create Modem Instance
     *  @param tx	uart transmit pin to communicate with Modem
     *  @param rx	uart receive pin to communicate with Modem
     *  @param baudRate	baud rate of uart communication
     */
    Modem(PinName tx, PinName rx, int baudRate) : serialModem(tx, rx) {
        serialModem.baud(baudRate);
    };

	Serial serialModem;

    /** Power on Modem
     */
    void preInit(void);

    /** check serialModem is readable or not
     *	@returns
     *		true on readable
     *		false on not readable
     */
    bool readable();

    /** read one byte from serialModem
     *	@returns
     *		one byte read from serialModem
     */
    char readByte(void);

    /** read from Modem module and save to buffer array
     *  @param  buffer	buffer array to save what read from Modem module
     *  @param  count 	the maximal bytes number read from Modem module
     *  @param  timeOut	time to wait for reading from Modem module
     *  @returns
     *      0 on success
     *      -1 on error
     */
    int readBuffer(char* buffer,int count, unsigned int timeOut);


    /** clean Buffer
     *	@param buffer	buffer to clean
     *	@param count	number of bytes to clean
     */
    void cleanBuffer(char* buffer, int count);

    /** send AT command to Modem module
     *  @param cmd	command array which will be send to GPRS module
     */
    void sendCmd(const char* cmd);

    /**send "AT" to Modem module
     */
    void sendATTest(void);

    /**	compare the response from GPRS module with a string
     *	@param resp	buffer to be compared
     *	@param len length that will be compared
     *	@param timeout	waiting seconds till timeout
     */
    bool respCmp(const char *resp, unsigned int len, unsigned int timeout);

    /** check Modem module response before time out
     *  @param  *resp   correct response which Modem module will return
     *  @param  *timeout    waiting seconds till timeout
     *  @returns
     *      0 on success
     *      -1 on error
     */
    int waitForResp(const char *resp, unsigned int timeout,DataType type);

    /** send AT command to GPRS module and wait for correct response
     *  @param  *cmd 	AT command which will be send to GPRS module
     *  @param  *resp   correct response which GPRS module will return
     *  @param  *timeout 	waiting seconds till timeout
     *  @returns
     *      0 on success
     *      -1 on error
     */
    int sendCmdAndWaitForResp(const char* data, const char *resp, unsigned timeout,DataType type);

    Timer timeCnt;

private:

};

#endif