adding csi rs file, function still empty

cmake_targets/CMakeLists.txt

@@ -1541,6 +1541,7 @@ set(PHY_SRC_UE
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_ulsch_llr_computation.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
   ${OPENAIR1_DIR}/PHY/NR_REFSIG/nr_dmrs_rx.c
+  ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_csi_rs.c
   ${OPENAIR1_DIR}/PHY/NR_REFSIG/nr_gold.c
   ${OPENAIR1_DIR}/PHY/NR_REFSIG/scrambling_luts.c
   ${OPENAIR1_DIR}/PHY/NR_REFSIG/dmrs_nr.c

openair1/PHY/NR_TRANSPORT/nr_csi_rs.c

@@ -0,0 +1,33 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+
+#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
+
+//#define NR_CSIRS_DEBUG
+
+int nr_generate_csi_rs(uint32_t **gold_csi_rs,
+                       int32_t *txdataF,
+                       NR_DL_FRAME_PARMS frame_parms,
+                       nfapi_nr_config_request_t config)
+{
+  return 0;
+}

openair1/PHY/NR_TRANSPORT/nr_transport_proto.h

@@ -326,6 +326,10 @@ void init_prach_list(PHY_VARS_gNB *gNB);
 void init_prach_ru_list(RU_t *ru);
 void free_nr_ru_prach_entry(RU_t *ru, int prach_id);
 
+int nr_generate_csi_rs(uint32_t **gold_csi_rs,
+                       int32_t *txdataF,
+                       NR_DL_FRAME_PARMS frame_parms,
+                       nfapi_nr_config_request_t config);
 
 void nr_decode_pucch1(int32_t **rxdataF,
                       pucch_GroupHopping_t pucch_GroupHopping,