BLE - Management of Tx path on Cordio.

features/FEATURE_BLE/ble/GattServer.h

@@ -693,6 +693,12 @@ class GattServer {
                     confirmationReceivedCallback(attributeHandle);
                 }
                 break;
+
+            case GattServerEvents::GATT_EVENT_DATA_SENT:
+                // Called every time a notification or indication has been sent
+                handleDataSentEvent(1);
+                break;
+
             default:
                 break;
         }

features/FEATURE_BLE/ble/generic/GenericGattClient.h

@@ -147,6 +147,15 @@ class GenericGattClient :
         uint16_t att_mtu_size
     );
 
+    /**
+     * @see pal::GattClient::EventHandler::on_write_command_sent
+     */
+    void on_write_command_sent_(
+        ble::connection_handle_t connection_handle,
+        ble::attribute_handle_t attribute_handle,
+        uint8_t status
+    );
+
 private:
     struct ProcedureControlBlock;
     struct DiscoveryControlBlock;

features/FEATURE_BLE/ble/pal/PalGattClient.h

@@ -52,6 +52,26 @@ struct GattClientEventHandler : StaticInterface<Impl, GattClientEventHandler> {
     ) { 
         impl()->on_att_mtu_change_(connection_handle, att_mtu_size);
     }
+
+    /**
+     * Function invoked when a write command has been sent out of the stack
+     * (either to the controller or over the air).
+     *
+     * @param connection_handle Connection targeted by the write command
+     * @param attribute_handle Attribute written
+     * @param status HCI status of the operation.
+     */
+    void on_write_command_sent(
+        ble::connection_handle_t connection_handle,
+        ble::attribute_handle_t attribute_handle,
+        uint8_t status
+    ) {
+        impl()->on_write_command_sent_(
+            connection_handle,
+            attribute_handle,
+            status
+        );
+    }
 };
 
 

features/FEATURE_BLE/source/generic/GenericGattClient.tpp

@@ -966,6 +966,7 @@ GenericGattClient<TPalGattClient, SigningMonitorEventHandler>::GenericGattClient
 	_pal_client->when_transaction_timeout(
 		mbed::callback(this, &GenericGattClient::on_transaction_timeout)
 	);
+	_pal_client->set_event_handler(this);
 }
 
 template<template<class> class TPalGattClient, class SigningMonitorEventHandler>
@@ -1338,6 +1339,24 @@ void GenericGattClient<TPalGattClient, SigningMonitorEventHandler>::on_att_mtu_c
 	}
 }
 
+template<template<class> class TPalGattClient, class SigningMonitorEventHandler>
+void GenericGattClient<TPalGattClient, SigningMonitorEventHandler>::on_write_command_sent_(
+    ble::connection_handle_t connection_handle,
+    ble::attribute_handle_t attribute_handle,
+    uint8_t status
+) {
+    GattWriteCallbackParams response = {
+        connection_handle,
+        attribute_handle,
+        GattWriteCallbackParams::OP_WRITE_CMD,
+        BLE_ERROR_NONE,
+        status
+    };
+
+    this->processWriteResponse(&response);
+}
+
+
 template<template<class> class TPalGattClient, class SigningMonitorEventHandler>
 void GenericGattClient<TPalGattClient, SigningMonitorEventHandler>::on_termination(connection_handle_t connection_handle) {
 	if (_termination_callback) {

features/FEATURE_BLE/targets/TARGET_CORDIO/source/CordioGattServer.cpp

@@ -695,10 +695,6 @@ ble_error_t GattServer::write_(
     }
 #endif // BLE_FEATURE_SECURITY
 
-    if (updates_sent) {
-        handleDataSentEvent(updates_sent);
-    }
-
     return BLE_ERROR_NONE;
 }
 
@@ -749,10 +745,6 @@ ble_error_t GattServer::write_(
     }
 #endif // BLE_FEATURE_SECURITY
 
-    if (updates_sent) {
-        handleDataSentEvent(updates_sent);
-    }
-
     return BLE_ERROR_NONE;
 }
 

features/FEATURE_BLE/targets/TARGET_CORDIO/source/CordioPalAttClient.cpp

@@ -32,6 +32,16 @@ void CordioAttClient::att_client_handler(const attEvt_t* event)
         if (handler) {
             handler->on_att_mtu_change(event->hdr.param, event->mtu);
         }
+    } else if (event->hdr.event == ATTC_WRITE_CMD_RSP) {
+        ble::vendor::cordio::BLE& ble = ble::vendor::cordio::BLE::deviceInstance();
+        impl::PalGattClientImpl::EventHandler *handler = ble.getPalGattClient().get_event_handler();
+        if (handler) {
+            handler->on_write_command_sent(
+                event->hdr.param,
+                event->handle,
+                event->hdr.status
+            );
+        }
     } else {
         // all handlers are stored in a static array
         static const event_handler_t handlers[] = {