Cellular: Fixed improper AT handler setup through virtual calls in co…

UNITTESTS/stubs/ATHandler_stub.cpp

@@ -405,3 +405,7 @@ void ATHandler::set_debug_list(bool debug_on)
     ATHandler_stub::debug_on = debug_on;
 }
 
+void ATHandler::set_send_delay(uint16_t send_delay)
+{
+}
+

UNITTESTS/stubs/AT_CellularDevice_stub.cpp

@@ -252,3 +252,7 @@ nsapi_error_t AT_CellularDevice::soft_power_off()
 void AT_CellularDevice::cellular_callback(nsapi_event_t ev, intptr_t ptr, CellularContext *ctx)
 {
 }
+
+void AT_CellularDevice::set_at_urcs_impl()
+{
+}

features/cellular/framework/AT/ATHandler.cpp

@@ -1544,3 +1544,8 @@ bool ATHandler::sync(int timeout_ms)
     unlock();
     return false;
 }
+
+void ATHandler::set_send_delay(uint16_t send_delay)
+{
+    _at_send_delay = send_delay;
+}

features/cellular/framework/AT/ATHandler.h

@@ -210,6 +210,12 @@ class ATHandler {
      */
     bool sync(int timeout_ms);
 
+    /** Sets the delay to be applied before sending any AT command.
+     *
+     *  @param send_delay the minimum delay in ms between the end of last response and the beginning of a new command
+     */
+    void set_send_delay(uint16_t send_delay);
+
 protected:
     void event();
 #ifdef AT_HANDLER_MUTEX

features/cellular/framework/AT/AT_CellularDevice.cpp

@@ -44,13 +44,6 @@ AT_CellularDevice::AT_CellularDevice(FileHandle *fh) : CellularDevice(fh), _netw
     MBED_ASSERT(fh);
     _at = get_at_handler(fh);
     MBED_ASSERT(_at);
-
-    if (AT_CellularBase::get_property(AT_CellularBase::PROPERTY_AT_CGEREP)) {
-        _at->set_urc_handler("+CGEV: NW DEACT", callback(this, &AT_CellularDevice::urc_nw_deact));
-        _at->set_urc_handler("+CGEV: ME DEACT", callback(this, &AT_CellularDevice::urc_nw_deact));
-        _at->set_urc_handler("+CGEV: NW PDN D", callback(this, &AT_CellularDevice::urc_pdn_deact));
-        _at->set_urc_handler("+CGEV: ME PDN D", callback(this, &AT_CellularDevice::urc_pdn_deact));
-    }
 }
 
 AT_CellularDevice::~AT_CellularDevice()
@@ -84,6 +77,29 @@ AT_CellularDevice::~AT_CellularDevice()
     release_at_handler(_at);
 }
 
+void AT_CellularDevice::set_at_urcs_impl()
+{
+}
+
+void AT_CellularDevice::set_at_urcs()
+{
+    if (AT_CellularBase::get_property(AT_CellularBase::PROPERTY_AT_CGEREP)) {
+        _at->set_urc_handler("+CGEV: NW DEACT", callback(this, &AT_CellularDevice::urc_nw_deact));
+        _at->set_urc_handler("+CGEV: ME DEACT", callback(this, &AT_CellularDevice::urc_nw_deact));
+        _at->set_urc_handler("+CGEV: NW PDN D", callback(this, &AT_CellularDevice::urc_pdn_deact));
+        _at->set_urc_handler("+CGEV: ME PDN D", callback(this, &AT_CellularDevice::urc_pdn_deact));
+    }
+
+    set_at_urcs_impl();
+}
+
+void AT_CellularDevice::setup_at_handler()
+{
+    set_at_urcs();
+
+    _at->set_send_delay(get_send_delay());
+}
+
 void AT_CellularDevice::urc_nw_deact()
 {
     // The network has forced a context deactivation
@@ -424,6 +440,8 @@ void AT_CellularDevice::modem_debug_on(bool on)
 
 nsapi_error_t AT_CellularDevice::init()
 {
+    setup_at_handler();
+
     _at->lock();
     _at->flush();
     _at->at_cmd_discard("E0", "");

features/cellular/framework/AT/AT_CellularDevice.h

@@ -144,6 +144,13 @@ class AT_CellularDevice : public CellularDevice {
 protected:
     virtual void cellular_callback(nsapi_event_t ev, intptr_t ptr, CellularContext *ctx = NULL);
     void send_disconnect_to_context(int cid);
+    // Sets commonly used URCs
+    void set_at_urcs();
+    // To be used for setting target specific URCs
+    virtual void set_at_urcs_impl();
+    // Sets up parameters for AT handler, for now only the send delay and URCs.
+    // This kind of routine is needed for initialisation routines that are virtual and therefore cannot be called from constructor.
+    void setup_at_handler();
 
 private:
     void urc_nw_deact();

features/cellular/framework/targets/GEMALTO/CINTERION/GEMALTO_CINTERION.cpp

@@ -78,6 +78,8 @@ nsapi_error_t GEMALTO_CINTERION::init()
     }
     tr_info("Cinterion model %s (%d)", model, _module);
 
+    set_at_urcs();
+
     return NSAPI_ERROR_OK;
 }
 

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

@@ -85,6 +85,8 @@ AT_CellularInformation *QUECTEL_BC95::open_information_impl(ATHandler &at)
 
 nsapi_error_t QUECTEL_BC95::init()
 {
+    setup_at_handler();
+
     _at->lock();
     _at->flush();
     _at->cmd_start("AT");

features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96.cpp

@@ -69,11 +69,13 @@ QUECTEL_BG96::QUECTEL_BG96(FileHandle *fh, PinName pwr, bool active_high, PinNam
       _pwr(pwr, !_active_high),
       _rst(rst, !_active_high)
 {
-    _at->set_urc_handler("+QIURC: \"pdpde",  mbed::Callback<void()>(this, &QUECTEL_BG96::urc_pdpdeact));
-
     AT_CellularBase::set_cellular_properties(cellular_properties);
 }
 
+void QUECTEL_BG96::set_at_urcs_impl()
+{
+    _at->set_urc_handler("+QIURC: \"pdpde",  mbed::Callback<void()>(this, &QUECTEL_BG96::urc_pdpdeact));
+}
 
 AT_CellularNetwork *QUECTEL_BG96::open_network_impl(ATHandler &at)
 {
@@ -157,6 +159,8 @@ nsapi_error_t QUECTEL_BG96::hard_power_off()
 
 nsapi_error_t QUECTEL_BG96::init()
 {
+    setup_at_handler();
+
     int retry = 0;
 
     _at->lock();

features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96.h

@@ -45,6 +45,7 @@ class QUECTEL_BG96 : public AT_CellularDevice {
     virtual nsapi_error_t hard_power_off();
     virtual nsapi_error_t soft_power_on();
     virtual nsapi_error_t init();
+    virtual void set_at_urcs_impl();
 
 public:
     void handle_urc(FileHandle *fh);

features/cellular/framework/targets/UBLOX/AT/UBLOX_AT.cpp

@@ -90,6 +90,8 @@ CellularDevice *CellularDevice::get_default_instance()
 
 nsapi_error_t UBLOX_AT::init()
 {
+    setup_at_handler();
+
     _at->lock();
     _at->flush();
     _at->cmd_start("AT");

features/cellular/framework/targets/UBLOX/N2XX/UBLOX_N2XX.cpp

@@ -39,10 +39,14 @@ static const intptr_t cellular_properties[AT_CellularBase::PROPERTY_MAX] = {
 UBLOX_N2XX::UBLOX_N2XX(FileHandle *fh): AT_CellularDevice(fh)
 {
     AT_CellularBase::set_cellular_properties(cellular_properties);
-    _at->set_urc_handler("+NPIN:", mbed::Callback<void()>(this, &UBLOX_N2XX::NPIN_URC));
     memset(simstr, 0, sizeof(simstr));
 }
 
+void UBLOX_N2XX::set_at_urcs_impl()
+{
+    _at->set_urc_handler("+NPIN:", mbed::Callback<void()>(this, &UBLOX_N2XX::NPIN_URC));
+}
+
 UBLOX_N2XX::~UBLOX_N2XX()
 {
     _at->set_urc_handler("+NPIN:", NULL);
@@ -66,6 +70,8 @@ AT_CellularSMS *UBLOX_N2XX::open_sms_impl(ATHandler &at)
 
 nsapi_error_t UBLOX_N2XX::init()
 {
+    setup_at_handler();
+
     _at->lock();
     _at->flush();
     _at->cmd_start("AT");

features/cellular/framework/targets/UBLOX/N2XX/UBLOX_N2XX.h

@@ -52,6 +52,7 @@ class UBLOX_N2XX : public AT_CellularDevice {
 
     virtual AT_CellularContext *create_context_impl(ATHandler &at, const char *apn, bool cp_req = false, bool nonip_req = false);
     virtual AT_CellularSMS *open_sms_impl(ATHandler &at);
+    virtual void set_at_urcs_impl();
 
 public: // NetworkInterface