fix home plmn extraction for PCSC USIM module

srsue/src/stack/upper/pcsc_usim.cc

@@ -184,12 +184,12 @@ bool pcsc_usim::get_home_plmn_id(srslte::plmn_id_t* home_plmn_id)
     plmn_str << (int)imsi_vec[i];
   }
 
-  if (not home_plmn_id->from_string(plmn_str.str())) {
+  if (home_plmn_id->from_string(plmn_str.str())) {
     log->error("Error reading home PLMN from SIM.\n");
     return false;
   }
 
-  log->info("Read Home PLMN Id=%s\n", plmn_str.str().c_str());
+  log->info("Read Home PLMN Id=%s\n", home_plmn_id->to_string().c_str());
 
   return true;
 }

srsue/test/upper/pcsc_usim_test.cc

@@ -55,6 +55,15 @@ int main(int argc, char **argv)
 
   std::string imsi = usim.get_imsi_str();
   cout << "IMSI: " << imsi << endl;
+
+  srslte::plmn_id_t home_plmn_id = {};
+  if (usim.get_home_plmn_id(&home_plmn_id) == false) {
+    printf("Error reading home PLMN\n");
+    return SRSLTE_ERROR;
+  }
+
+  cout << "Home PLMN: " << home_plmn_id.to_string() << endl;
+
   auth_result_t result = usim.generate_authentication_response(rand_enb, autn_enb, mcc, mnc, res, &res_len, k_asme);
 
   return SRSLTE_SUCCESS;