Own SIM state retrieval for Quectel BC95

Author: Mirela Chirica

features/cellular/framework/targets/QUECTEL/BC95/QUECTEL_BC95.cpp

@@ -17,6 +17,7 @@
 
 #include "QUECTEL_BC95_CellularNetwork.h"
 #include "QUECTEL_BC95_CellularPower.h"
+#include "QUECTEL_BC95_CellularSIM.h"
 
 #include "QUECTEL_BC95.h"
 
@@ -41,15 +42,41 @@ QUECTEL_BC95::~QUECTEL_BC95()
 CellularNetwork *QUECTEL_BC95::open_network(FileHandle *fh)
 {
     if (!_network) {
-        _network = new QUECTEL_BC95_CellularNetwork(*get_at_handler(fh));
+        ATHandler *atHandler = get_at_handler(fh);
+        if (atHandler) {
+            _network = new QUECTEL_BC95_CellularNetwork(*atHandler);
+            if (!_network) {
+                release_at_handler(atHandler);
+            }
+        }
     }
     return _network;
 }
 
 CellularPower *QUECTEL_BC95::open_power(FileHandle *fh)
 {
     if (!_power) {
-        _power = new QUECTEL_BC95_CellularPower(*get_at_handler(fh));
+        ATHandler *atHandler = get_at_handler(fh);
+        if (atHandler) {
+            _power = new QUECTEL_BC95_CellularPower(*atHandler);
+            if (!_power) {
+                release_at_handler(atHandler);
+            }
+        }
     }
     return _power;
 }
+
+CellularSIM *QUECTEL_BC95::open_sim(FileHandle *fh)
+{
+    if (!_sim) {
+        ATHandler *atHandler = get_at_handler(fh);
+        if (atHandler) {
+            _sim = new QUECTEL_BC95_CellularSIM(*atHandler);
+            if (!_sim) {
+                release_at_handler(atHandler);
+            }
+        }
+    }
+    return _sim;
+}

features/cellular/framework/targets/QUECTEL/BC95/QUECTEL_BC95.h

@@ -32,6 +32,7 @@ class QUECTEL_BC95 : public AT_CellularDevice
 public: // CellularDevice
     virtual CellularNetwork *open_network(FileHandle *fh);
     virtual CellularPower *open_power(FileHandle *fh);
+    virtual CellularSIM *open_sim(FileHandle *fh);
 
 public: // NetworkInterface
     void handle_urc(FileHandle *fh);

features/cellular/framework/targets/QUECTEL/BC95/QUECTEL_BC95_CellularSIM.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2017, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#include "QUECTEL_BC95_CellularSIM.h"
+#include "CellularLog.h"
+
+using namespace mbed;
+
+QUECTEL_BC95_CellularSIM::QUECTEL_BC95_CellularSIM(ATHandler &atHandler) : AT_CellularSIM(atHandler)
+{
+
+}
+
+QUECTEL_BC95_CellularSIM::~QUECTEL_BC95_CellularSIM()
+{
+
+}
+
+nsapi_error_t QUECTEL_BC95_CellularSIM::get_sim_state(SimState &state)
+{
+    _at.lock();
+    _at.flush();
+    _at.cmd_start("AT+NCCID?");
+    _at.cmd_stop();
+    _at.resp_start("+NCCID:");
+    if (_at.info_resp()) {
+        state = SimStateReady;
+    } else {
+        tr_warn("SIM not readable.");
+        state = SimStateUnknown; // SIM may not be ready yet
+    }
+    _at.resp_stop();
+    return _at.unlock_return_error();
+}
+

features/cellular/framework/targets/QUECTEL/BC95/QUECTEL_BC95_CellularSIM.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#ifndef QUECTEL_BC95_CELLULAR_SIM_H_
+#define QUECTEL_BC95_CELLULAR_SIM_H_
+
+#include "AT_CellularSIM.h"
+
+namespace mbed {
+
+class QUECTEL_BC95_CellularSIM : public AT_CellularSIM
+{
+public:
+    QUECTEL_BC95_CellularSIM(ATHandler &atHandler);
+    virtual ~QUECTEL_BC95_CellularSIM();
+
+public: //from CellularSIM
+    virtual nsapi_error_t get_sim_state(SimState &state);
+};
+
+} // namespace mbed
+
+#endif // QUECTEL_BC95_CELLULAR_SIM_H_