first implementation of MAC function for SSB RSRP (to be verified)

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c

@@ -82,6 +82,17 @@ int get_diff_rsrp(uint8_t index, int strongest_rsrp) {
     return MIN_RSRP_VALUE;
 }
 
+void reverse_n_bits(uint8_t *value, uint16_t bitlen) {
+  uint16_t j;
+  uint8_t i;
+  for(j = bitlen - 1,i = 0; j > i; j--, i++) {
+    if(((*value>>j)&1) != ((*value>>i)&1)) {
+      *value ^= (1<<j);
+      *value ^= (1<<i);
+    }
+  }
+}
+
 
 // start symbols for SSB types A,B,C,D,E
 uint16_t symbol_ssb_AC[8]={2,8,16,22,30,36,44,50};

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h

@@ -158,6 +158,8 @@ void find_period_offest_SR (NR_SchedulingRequestResourceConfig_t *SchedulingReqR
 void csi_period_offset(const NR_CSI_ReportConfig_t *csirep,
                        int *period, int *offset);
 
+void reverse_n_bits(uint8_t *value, uint16_t bitlen);
+
 bool set_dl_ptrs_values(NR_PTRS_DownlinkConfig_t *ptrs_config,
                         uint16_t rbSize, uint8_t mcsIndex, uint8_t mcsTable,
                         uint8_t *K_ptrs, uint8_t *L_ptrs,uint8_t *portIndex,