Diff: source/DiscoveredCharacteristic.cpp

Revision:

1201:6dd8b141406e

Parent:

1135:22aada733dbd

--- a/source/DiscoveredCharacteristic.cpp	Wed Apr 06 19:16:08 2016 +0100
+++ b/source/DiscoveredCharacteristic.cpp	Fri Jul 08 23:39:31 2016 +0000
@@ -105,6 +105,28 @@
     return gattc->write(GattClient::GATT_OP_WRITE_CMD, connHandle, valueHandle, length, value);
 }
 
+ble_error_t
+DiscoveredCharacteristic::requestHVX(HVXType_t type) const
+{
+    if (type == BLE_HVX_NOTIFICATION && !props.notify()) {
+        return BLE_ERROR_OPERATION_NOT_PERMITTED;
+    }
+
+    if (type == BLE_HVX_INDICATION && !props.indicate()) {
+        return BLE_ERROR_OPERATION_NOT_PERMITTED;
+    }
+
+    if (!gattc) {
+        return BLE_ERROR_INVALID_STATE;
+    }
+
+    /* Cargo Culted from: https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_ButtonSense/file/2dec89c76f68/main.cpp */
+    /* HACK. We're assuming that CCCD descriptor immediately follows the value attribute. */
+    /* TODO actually discover the handle for the CCCD descriptor */
+    uint16_t value = (uint16_t)type;
+    return gattc->write(GattClient::GATT_OP_WRITE_REQ, connHandle, valueHandle + 1, sizeof(value), (const uint8_t*)(&value));
+}
+
 struct OneShotWriteCallback {
     static void launch(GattClient* client, Gap::Handle_t connHandle,
                        GattAttribute::Handle_t handle, const GattClient::WriteCallback_t& cb) {