support library for C027 helper functions for Buffer Pipes, Buffered Serial Port (rtos capable) and GPS parsing. It includes modem APIs for USSD, SMS and Sockets.

Dependents:   HTTPClient_Cellular_HelloWorld Cellular_HelloMQTT MbedSmartRestMain Car_Bon_car_module ... more

This library is intended to be used with u-blox products such as the C027 or a shield with u-blox cellular and GPS modules like the cellular and positioning shield from Embedded Artist.

For 2G/GSM and 3G/UMTS you need to:

  • have a SIM card and know its PIN number
  • need to know you network operators APN setting These setting should be passed to the connect or init and join functions. You can also extend the APN database in MDMAPN.h.

For CDMA products you need to make sure that you have provisioned and activated the modem with either Sprint or Verizon.

Revision:
38:e6cab4632d84
Parent:
35:9275215a3a5b
Child:
44:9d12223b78ff
--- a/MDM.h	Thu Apr 10 13:44:54 2014 +0000
+++ b/MDM.h	Fri Apr 11 16:30:54 2014 +0000
@@ -15,6 +15,8 @@
  #define _C027DEFAULT(name)
 #endif
 
+/** basic modem parser class 
+*/
 class MDMParser
 {
 public:
@@ -24,9 +26,13 @@
     // ----------------------------------------------------------------
     // Types 
     // ----------------------------------------------------------------
-    typedef enum { DEV_UNKNOWN, DEV_SARA_G350, DEV_LISA_U200, DEV_LISA_C200 } Dev; //!< MT Device Types 
-    typedef enum { SIM_UNKNOWN, SIM_PIN, SIM_READY } Sim; //!< SIM Status
-    typedef enum { LPM_DISABLED, LPM_ENABLED, LPM_ACTIVE, LPM_SLEEP } Lpm; //!< SIM Status
+    //! MT Device Types 
+    typedef enum { DEV_UNKNOWN, DEV_SARA_G350, DEV_LISA_U200, DEV_LISA_C200 } Dev; 
+    //! SIM Status
+    typedef enum { SIM_UNKNOWN, SIM_PIN, SIM_READY } Sim;
+    //! SIM Status
+    typedef enum { LPM_DISABLED, LPM_ENABLED, LPM_ACTIVE, LPM_SLEEP } Lpm; 
+    //! Device status
     typedef struct { 
         Dev dev;            //!< Device Type
         Lpm lpm;            //!< Power Saving 
@@ -38,17 +44,21 @@
         char manu[16];      //!< Manufacturer (u-blox)
         char model[16];     //!< Model Name (LISA-U200, LISA-C200 or SARA-G350)
         char ver[16];       //!< Software Version
-    } DevStatus;            //!< Device status
-    typedef enum { REG_UNKNOWN, REG_DENIED, REG_NONE, REG_HOME, REG_ROAMING } Reg; //!< Registration Status
-    typedef enum { ACT_UNKNOWN, ACT_GSM, ACT_EDGE, ACT_UTRAN, ACT_CDMA } AcT; //!< Access Technology
+    } DevStatus;
+    //! Registration Status
+    typedef enum { REG_UNKNOWN, REG_DENIED, REG_NONE, REG_HOME, REG_ROAMING } Reg; 
+    //! Access Technology
+    typedef enum { ACT_UNKNOWN, ACT_GSM, ACT_EDGE, ACT_UTRAN, ACT_CDMA } AcT; 
+    //! Network Status
     typedef struct { 
         Reg reg;        //!< Registration Status
         AcT act;        //!< Access Technology
         int rssi;       //!< Received Signal Strength Indication (in dBm, range -113..-53)
         char opr[16+1]; //!< Operator Name
         char num[32];   //!< Mobile Directory Number
-    } NetStatus;        //!< Network Status
-    typedef uint32_t IP; //!< An IP v4 address
+    } NetStatus;
+    //! An IP v4 address
+    typedef uint32_t IP;
     #define NOIP ((MDMParser::IP)0) //!< No IP address
     // ip number formating and conversion
     #define IPSTR           "%d.%d.%d.%d"
@@ -232,11 +242,11 @@
     */
     bool ussdCommand(const char* cmd, char* buf);
     
-     // ----------------------------------------------------------------
+    // ----------------------------------------------------------------
     // Parseing
     // ----------------------------------------------------------------
     
-   // waitFinalResp Responses
+    // waitFinalResp Responses
     #define NOT_FOUND    0
     #define WAIT        -1 // TIMEOUT
     #define OK          -2 
@@ -382,7 +392,7 @@
     typedef struct { int* ix; int num; } CMGLparam;
     static int _cbCMGL(int type, const char* buf, int len, CMGLparam* param);
     static int _cbCMGR(int type, const char* buf, int len, CMGRparam* param);
-    // 
+    // variables
     DevStatus   _dev; //!< collected device information
     NetStatus   _net; //!< collected network information 
     IP          _ip;  //!< assigned ip address
@@ -394,9 +404,24 @@
 
 // -----------------------------------------------------------------------
 
+/** modem class which uses a serial port 
+    as physical interface. 
+*/
 class MDMSerial :  public SerialPipe, public MDMParser
 {
 public: 
+    /** Constructor
+    
+        \param tx is the serial ports transmit pin (modem to CPU)
+        \param rx is the serial ports receive pin (CPU to modem)
+        \param baudrate the baudrate of the modem use 115200
+        \param rts is the serial ports ready to send pin (CPU to modem) 
+               this pin is optional 
+        \param cts is the serial ports clear to send pin (modem to CPU) 
+               this pin is optional, but required for power saving to be enabled
+        \param rxSize the size of the serial rx buffer
+        \param txSize the size of the serial tx buffer
+    */
     MDMSerial(PinName tx    _C027DEFAULT(MDMTXD), 
               PinName rx    _C027DEFAULT(MDMRXD), 
               int baudrate  _C027DEFAULT(MDMBAUD),
@@ -406,14 +431,26 @@
  #endif
               int rxSize    = 256 , 
               int txSize    = 128 );
+    /** Get a line from the physical interface. 
+        \param buf the buffer to store it
+        \param buf size of the buffer
+        \return type and length if something was found, 
+                WAIT if not enough data is available
+                NOT_FOUND if nothing was found
+    */ 
     virtual int getLine(char* buffer, int length);
 protected:
+    /** Write bytes to the physical interface.
+        \param buf the buffer to write
+        \param buf size of the buffer to write
+        \return bytes written
+    */
     virtual int _send(const void* buf, int len);
 };
 
 // -----------------------------------------------------------------------
 
-#define HAVE_MDMUSB
+//#define HAVE_MDMUSB
 #ifdef HAVE_MDMUSB
 class MDMUsb :  /*public UsbSerial,*/ public MDMParser
 {