u-blox / C027_Support

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.

Diff: MDM.cpp

Revision:
44:9d12223b78ff
Parent:
43:a89a7a505991
Child:
45:ebc2fd8dcf21
--- a/MDM.cpp	Fri Apr 11 20:10:28 2014 +0000
+++ b/MDM.cpp	Thu Apr 17 20:41:30 2014 +0000
@@ -36,8 +36,11 @@
  #define WHY(t) COL("37m",t)
 #endif
 
+MDMParser* MDMParser::inst;
+
 MDMParser::MDMParser(void)
 {
+    inst = this;
     memset(&_dev, 0, sizeof(_dev));
     memset(&_net, 0, sizeof(_net));
     _ip        = NOIP;
@@ -635,6 +638,7 @@
     // successfull
     _sockets[socket].state = SOCK_CREATED;
     _sockets[socket].pending = 0;
+    _sockets[socket].timeout_ms = 0; // non blocking
     return socket;
 }
 
@@ -653,6 +657,19 @@
     return true;
 }
 
+bool MDMParser::socketIsConnected(int socket)
+{
+    return (ISSOCKET(socket) && (_sockets[socket].state == SOCK_CONNECTED));
+}
+
+bool MDMParser::socketSetBlocking(int socket, unsigned int timeout_ms)
+{
+    if (!ISSOCKET(socket))
+        return false;
+    _sockets[socket].timeout_ms = timeout_ms;
+    return true;
+}
+
 bool  MDMParser::socketClose(int socket)
 {
     if (!ISSOCKET(socket) || (_sockets[socket].state != SOCK_CONNECTED))
@@ -660,6 +677,7 @@
     sendFormated("AT+USOCL=%d\r\n", socket);
     if (OK != waitFinalResp())
         return false;
+    _sockets[socket].state = SOCK_CREATED;
     return true;
 }
 
@@ -729,27 +747,33 @@
     if (!ISSOCKET(socket))
         return SOCKET_ERROR;
     memset(buf, '\0', len);
+    Timer timer;
+    timer.start();
     while (len) {
         int blk = MAX_SIZE - 64; // still need space for headers and unsolicited  commands 
-        if (_sockets[socket].state != SOCK_CONNECTED)
-            return cnt ? cnt : SOCKET_ERROR;
         if (_sockets[socket].pending < blk)
             blk = _sockets[socket].pending;
         if (len < blk) blk = len;
         if (blk) {
-             sendFormated("AT+USORD=%d,%d\r\n",socket, blk);
+            sendFormated("AT+USORD=%d,%d\r\n",socket, blk);
             if (OK != waitFinalResp(_cbUSORD, buf)) {
-                return cnt ? cnt : SOCKET_ERROR;
+                return SOCKET_ERROR;
             }
             len -= blk;
             cnt += blk;
             buf += blk;
             _sockets[socket].pending -= blk;
-        } else {
+        } else if ((_sockets[socket].state == SOCK_CONNECTED) && (
+                   (_sockets[socket].timeout_ms == (unsigned int)-1 /* blocking */) || 
+                   (timer.read_ms() < _sockets[socket].timeout_ms))){
             // allow to receive unsolicited commands 
             waitFinalResp(NULL, NULL, 10);
+        } else {
+            len = 0; // no more data and socket closed or timed-out
         }
     }
+    timer.stop();
+    timer.reset();
     return cnt;
 }
 
@@ -774,10 +798,10 @@
     if (!ISSOCKET(socket))
         return SOCKET_ERROR;
     memset(buf, '\0', len);
+    Timer timer;
+    timer.start();
     while (len) {
         int blk = MAX_SIZE - 64; // still need space for headers and unsolicited commands 
-        if (_sockets[socket].state != SOCK_CONNECTED)
-            return cnt ? cnt : SOCKET_ERROR;
         if (_sockets[socket].pending < blk)
             blk = _sockets[socket].pending;
         if (len < blk) blk = len;
@@ -786,7 +810,7 @@
             USORFparam param;
             param.buf = buf;
             if (OK != waitFinalResp(_cbUSORF, &param)) {
-                return cnt ? cnt : SOCKET_ERROR;
+                return SOCKET_ERROR;
             }
             *ip = param.ip;
             //*port = param.port;
@@ -794,11 +818,17 @@
             cnt += blk;
             buf += blk;
             _sockets[socket].pending -= blk;
-        } else {
+        } else if ((_sockets[socket].state == SOCK_CONNECTED) && (
+                   (_sockets[socket].timeout_ms == (unsigned int)-1 /* blocking */) || 
+                   (timer.read_ms() < _sockets[socket].timeout_ms))){
             // allow to receive unsolicited commands 
             waitFinalResp(NULL, NULL, 10);
+        } else {
+            len = 0; // no more data and socket closed or timed-out
         }
     }
+    timer.stop();
+    timer.reset();
     return cnt;
 }