Merge pull request ARMmbed#76 from linlingao/network_callback

Add network connection callback

Author: linlingao

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/device/CC3220SF_WiFiInterface.cpp

@@ -81,6 +81,8 @@ nsapi_error_t CC3220SFInterface::connect()
         return NSAPI_ERROR_IS_CONNECTED;
     }
 
+    _cc3200_simplelink.set_connection_status(NSAPI_STATUS_CONNECTING);
+
     status = _startup(CC3200_SIMPLELINK::WIFI_ROLE_STATION);
     if(status != NSAPI_ERROR_OK)
     {
@@ -107,11 +109,16 @@ nsapi_error_t CC3220SFInterface::connect()
     {
         printf("IP address set timed out\n");
     }
+    else
+    {
+        _cc3200_simplelink.set_connection_status(NSAPI_STATUS_GLOBAL_UP);
+    }
 
     if (!get_ip_address())
     {
         return NSAPI_ERROR_DHCP_FAILURE;
     }
+
     return NSAPI_ERROR_OK;
 }
 
@@ -168,10 +175,21 @@ nsapi_error_t CC3220SFInterface::set_channel(uint8_t channel)
 
 nsapi_error_t CC3220SFInterface::disconnect()
 {
+    nsapi_error_t status;
+
     _started = false;
     _initialized = false;
 
-    return _cc3200_simplelink.disconnect() ? NSAPI_ERROR_OK : NSAPI_ERROR_DEVICE_ERROR;
+    if (_cc3200_simplelink.disconnect())
+    {
+        status = NSAPI_ERROR_OK;
+        _cc3200_simplelink.set_connection_status(NSAPI_STATUS_DISCONNECTED);
+    }
+    else
+    {
+        status = NSAPI_ERROR_DEVICE_ERROR;
+    }
+    return status;
 }
 
 const char *CC3220SFInterface::get_ip_address()

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/device/cc3200_simplelink.cpp

@@ -167,12 +167,6 @@ nsapi_error_t CC3200_SIMPLELINK::connect(const char *ssid, const char *passPhras
 
     strncpy(_connected_ssid, ssid, sizeof(_connected_ssid));
 
-    _connection_status = NSAPI_STATUS_CONNECTING;
-    if(_connection_status_cb)
-    {
-        _connection_status_cb(NSAPI_EVENT_CONNECTION_STATUS_CHANGE, _connection_status);
-    }
-
     memset((void*)&sec_params, 0, sizeof(sec_params));
 
     startup(CC3200_SIMPLELINK::WIFI_ROLE_STATION);
@@ -542,6 +536,15 @@ nsapi_connection_status_t CC3200_SIMPLELINK::get_connection_status() const
     return _connection_status;
 }
 
+void CC3200_SIMPLELINK::set_connection_status(nsapi_connection_status_t status)
+{
+    _connection_status = status;
+    if(_connection_status_cb)
+    {
+        _connection_status_cb(NSAPI_EVENT_CONNECTION_STATUS_CHANGE, _connection_status);
+    }
+}
+
 void CC3200_SIMPLELINK::attach(mbed::Callback<void(nsapi_event_t, intptr_t)> status_cb)
 {
     _connection_status_cb = status_cb;

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/device/cc3200_simplelink.h

@@ -290,6 +290,12 @@ class CC3200_SIMPLELINK
      */
     nsapi_connection_status_t get_connection_status() const;
 
+    /** Set the connection status
+     *
+     *  @param status   The connection status to set
+     */
+    void set_connection_status(nsapi_connection_status_t status);
+
     static const int8_t WIFI_ROLE_STATION = 1;
     static const int8_t WIFI_ROLE_AP = 2;
     static const int8_t WIFI_ROLE_P2P = 3;