Diff: nRF51822/nRF51GattServer.cpp

Revision:

0:76dfa9657d9d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51822/nRF51GattServer.cpp	Wed Nov 12 02:40:34 2014 +0000
@@ -0,0 +1,302 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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 "nRF51GattServer.h"
+#include "mbed.h"
+
+#include "common/common.h"
+#include "btle/custom/custom_helper.h"
+
+#include "nRF51Gap.h"
+
+/**************************************************************************/
+/*!
+    @brief  Adds a new service to the GATT table on the peripheral
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t nRF51GattServer::addService(GattService &service)
+{
+    /* ToDo: Make sure we don't overflow the array, etc. */
+    /* ToDo: Make sure this service UUID doesn't already exist (?) */
+    /* ToDo: Basic validation */
+
+    /* Add the service to the nRF51 */
+    ble_uuid_t nordicUUID;
+    nordicUUID = custom_convert_to_nordic_uuid(service.getUUID());
+
+    uint16_t serviceHandle;
+    ASSERT( ERROR_NONE ==
+            sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
+                                     &nordicUUID,
+                                     &serviceHandle),
+            BLE_ERROR_PARAM_OUT_OF_RANGE );
+    service.setHandle(serviceHandle);
+
+    /* Add characteristics to the service */
+    for (uint8_t i = 0; i < service.getCharacteristicCount(); i++) {
+        GattCharacteristic *p_char = service.getCharacteristic(i);
+
+        /* Skip any incompletely defined, read-only characteristics. */
+        if ((p_char->getValueAttribute().getValuePtr() == NULL) &&
+            (p_char->getValueAttribute().getInitialLength() == 0) &&
+            (p_char->getProperties() == GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ)) {
+            continue;
+        }
+
+        nordicUUID = custom_convert_to_nordic_uuid(p_char->getValueAttribute().getUUID());
+
+        ASSERT ( ERROR_NONE ==
+                 custom_add_in_characteristic(BLE_GATT_HANDLE_INVALID,
+                                              &nordicUUID,
+                                              p_char->getProperties(),
+                                              p_char->getValueAttribute().getValuePtr(),
+                                              p_char->getValueAttribute().getInitialLength(),
+                                              p_char->getValueAttribute().getMaxLength(),
+                                              &nrfCharacteristicHandles[characteristicCount]),
+                 BLE_ERROR_PARAM_OUT_OF_RANGE );
+
+        /* Update the characteristic handle */
+        uint16_t charHandle = characteristicCount;
+        p_characteristics[characteristicCount++] = p_char;
+
+        p_char->getValueAttribute().setHandle(charHandle);
+
+        /* Add optional descriptors if any */
+        /* ToDo: Make sure we don't overflow the array */
+        for (uint8_t j = 0; j < p_char->getDescriptorCount(); j++) {
+             GattAttribute *p_desc = p_char->getDescriptor(j);
+
+             nordicUUID = custom_convert_to_nordic_uuid(p_desc->getUUID());
+
+             ASSERT ( ERROR_NONE ==
+                      custom_add_in_descriptor(BLE_GATT_HANDLE_INVALID,
+                                               &nordicUUID,
+                                               p_desc->getValuePtr(),
+                                               p_desc->getInitialLength(),
+                                               p_desc->getMaxLength(),
+                                               &nrfDescriptorHandles[descriptorCount]),
+                 BLE_ERROR_PARAM_OUT_OF_RANGE );
+
+            uint16_t descHandle = descriptorCount;
+            p_descriptors[descriptorCount++] = p_desc;
+            p_desc->setHandle(descHandle);
+        }
+    }
+
+    serviceCount++;
+
+    return BLE_ERROR_NONE;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Reads the value of a characteristic, based on the service
+            and characteristic index fields
+
+    @param[in]  charHandle
+                The handle of the GattCharacteristic to read from
+    @param[in]  buffer
+                Buffer to hold the the characteristic's value
+                (raw byte array in LSB format)
+    @param[in]  len
+                The number of bytes read into the buffer
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t nRF51GattServer::readValue(uint16_t charHandle, uint8_t buffer[], uint16_t *const lengthP)
+{
+    ASSERT( ERROR_NONE ==
+            sd_ble_gatts_value_get(nrfCharacteristicHandles[charHandle].value_handle, 0, lengthP, buffer),
+            BLE_ERROR_PARAM_OUT_OF_RANGE);
+
+    return BLE_ERROR_NONE;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Updates the value of a characteristic, based on the service
+            and characteristic index fields
+
+    @param[in]  charHandle
+                The handle of the GattCharacteristic to write to
+    @param[in]  buffer
+                Data to use when updating the characteristic's value
+                (raw byte array in LSB format)
+    @param[in]  len
+                The number of bytes in buffer
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t nRF51GattServer::updateValue(uint16_t charHandle, uint8_t buffer[], uint16_t len, bool localOnly)
+{
+    uint16_t gapConnectionHandle = nRF51Gap::getInstance().getConnectionHandle();
+
+    if (localOnly) {
+        /* Only update locally regardless of notify/indicate */
+        ASSERT_INT( ERROR_NONE,
+                    sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer),
+                    BLE_ERROR_PARAM_OUT_OF_RANGE );
+		return BLE_ERROR_NONE;
+    }
+
+    if ((p_characteristics[charHandle]->getProperties() &
+         (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE |
+          GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) &&
+        (gapConnectionHandle != BLE_CONN_HANDLE_INVALID)) {
+        /* HVX update for the characteristic value */
+        ble_gatts_hvx_params_t hvx_params;
+
+        hvx_params.handle = nrfCharacteristicHandles[charHandle].value_handle;
+        hvx_params.type   =
+            (p_characteristics[charHandle]->getProperties() &
+             GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)  ?
+            BLE_GATT_HVX_NOTIFICATION : BLE_GATT_HVX_INDICATION;
+        hvx_params.offset = 0;
+        hvx_params.p_data = buffer;
+        hvx_params.p_len  = &len;
+
+        error_t error = (error_t) sd_ble_gatts_hvx(gapConnectionHandle, &hvx_params);
+
+        /* ERROR_INVALID_STATE, ERROR_BUSY, ERROR_GATTS_SYS_ATTR_MISSING and
+         *ERROR_NO_TX_BUFFERS the ATT table has been updated. */
+        if ((error != ERROR_NONE) && (error != ERROR_INVALID_STATE) &&
+                (error != ERROR_BLE_NO_TX_BUFFERS) && (error != ERROR_BUSY) &&
+                (error != ERROR_BLEGATTS_SYS_ATTR_MISSING)) {
+            ASSERT_INT( ERROR_NONE,
+                        sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer),
+                        BLE_ERROR_PARAM_OUT_OF_RANGE );
+        }
+    } else {
+        ASSERT_INT( ERROR_NONE,
+                    sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer),
+                    BLE_ERROR_PARAM_OUT_OF_RANGE );
+    }
+
+    return BLE_ERROR_NONE;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Callback handler for events getting pushed up from the SD
+*/
+/**************************************************************************/
+void nRF51GattServer::hwCallback(ble_evt_t *p_ble_evt)
+{
+    uint16_t                       handle_value;
+    GattServerEvents::gattEvent_t  eventType;
+    const ble_gatts_evt_t         *gattsEventP = &p_ble_evt->evt.gatts_evt;
+
+    switch (p_ble_evt->header.evt_id) {
+        case BLE_GATTS_EVT_WRITE:
+            /* There are 2 use case here: Values being updated & CCCD (indicate/notify) enabled */
+
+            /* 1.) Handle CCCD changes */
+            handle_value = gattsEventP->params.write.handle;
+            for (uint8_t i = 0; i<characteristicCount; i++) {
+                if ((p_characteristics[i]->getProperties() & (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) &&
+                    (nrfCharacteristicHandles[i].cccd_handle == handle_value)) {
+                    uint16_t cccd_value =
+                        (gattsEventP->params.write.data[1] << 8) |
+                        gattsEventP->params.write.data[0]; /* Little Endian but M0 may be mis-aligned */
+
+                    if (((p_characteristics[i]->getProperties() & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE) && (cccd_value & BLE_GATT_HVX_INDICATION)) ||
+                        ((p_characteristics[i]->getProperties() & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) && (cccd_value & BLE_GATT_HVX_NOTIFICATION))) {
+                        eventType = GattServerEvents::GATT_EVENT_UPDATES_ENABLED;
+                    } else {
+                        eventType = GattServerEvents::GATT_EVENT_UPDATES_DISABLED;
+                    }
+
+                    handleEvent(eventType, i);
+                    return;
+                }
+            }
+
+            /* 2.) Changes to the characteristic value will be handled with other events below */
+            eventType = GattServerEvents::GATT_EVENT_DATA_WRITTEN;
+            break;
+
+        case BLE_GATTS_EVT_HVC:
+            /* Indication confirmation received */
+            eventType    = GattServerEvents::GATT_EVENT_CONFIRMATION_RECEIVED;
+            handle_value = gattsEventP->params.hvc.handle;
+            break;
+
+        case BLE_EVT_TX_COMPLETE: {
+            handleDataSentEvent(p_ble_evt->evt.common_evt.params.tx_complete.count);
+            return;
+        }
+
+        case BLE_GATTS_EVT_SYS_ATTR_MISSING:
+            sd_ble_gatts_sys_attr_set(gattsEventP->conn_handle, NULL, 0);
+            return;
+
+        default:
+            return;
+    }
+
+    /* Find index (charHandle) in the pool */
+    for (uint8_t i = 0; i<characteristicCount; i++) {
+        if (nrfCharacteristicHandles[i].value_handle == handle_value) {
+            switch (eventType) {
+                case GattServerEvents::GATT_EVENT_DATA_WRITTEN: {
+                    GattCharacteristicWriteCBParams cbParams = {
+                        .charHandle = i,
+                        .op     = static_cast<GattCharacteristicWriteCBParams::Type>(gattsEventP->params.write.op),
+                        .offset = gattsEventP->params.write.offset,
+                        .len    = gattsEventP->params.write.len,
+                        .data   = gattsEventP->params.write.data
+                    };
+                    handleDataWrittenEvent(&cbParams);
+                    break;
+                }
+                default:
+                    handleEvent(eventType, i);
+                    break;
+            }
+        }
+    }
+}