diff --git a/BF_companion b/BF_companion
index 4112af0..45b53ac 100755
Binary files a/BF_companion and b/BF_companion differ
diff --git a/build/main.o b/build/main.o
index 644d7f0..c323d52 100644
Binary files a/build/main.o and b/build/main.o differ
diff --git a/main.c b/main.c
index 615fb53..a8f5515 100644
--- a/main.c
+++ b/main.c
@@ -154,9 +154,16 @@ typedef enum {
   BF_MODE_AVG = 1
 } bf_mode_t;
 
+typedef enum {
+  BFMODE_TRANSPARENT = 0,
+  BFMODE_AVG = 1,
+  BFMODE_FFT = 2
+} blackfin_mode_t;
+
 typedef struct main_state_typedef{
   run_mode_t run_mode; // TEST, FINITE_RUN, INF_RUN
   bf_mode_t BF_mode;   // TRANSPARENT, AVG
+  blackfin_mode_t BlackFin_mode; // TRANSPARENT, AVG, FFT
   uint32_t run_length; // in ms. Used as timeout for receive_to_file
   uint32_t run_I;      // № current run
   uint32_t runs_N;     // total number of runs
@@ -166,6 +173,7 @@ typedef struct main_state_typedef{
 static void main_state_set_defaults(main_state* st) {
   st->run_mode = RUN_MODE_TEST;
   st->BF_mode = BF_MODE_TRANSPARENT;
+  st->BlackFin_mode = BFMODE_TRANSPARENT;
   st->run_length = 1000;
   st->run_I = 0;
   st->runs_N = 1;
@@ -218,6 +226,16 @@ static void parse_cmd_file(const char* filename, main_state* st) {
       } else {
         st->BF_mode = BF_MODE_TRANSPARENT; // default on mismatch
       }
+    } else if (strcmp(field, "BlackFin_mode") == 0) {
+      if (strcmp(value, "TRANSPARENT") == 0) {
+        st->BlackFin_mode = BFMODE_TRANSPARENT;
+      } else if (strcmp(value, "AVG") == 0) {
+        st->BlackFin_mode = BFMODE_AVG;
+      } else if (strcmp(value, "FFT") == 0) {
+        st->BlackFin_mode = BFMODE_FFT;
+      } else {
+        st->BlackFin_mode = BFMODE_TRANSPARENT; // default on mismatch
+      }
     } else if (strcmp(field, "run_length") == 0) {
       char* endp = NULL;
       unsigned long v = strtoul(value, &endp, 0);
@@ -675,7 +693,11 @@ void insert_marker_to_file(char* logfilename, char* marker_text){
 
 
 void receive_to_file(t_x502_hnd hnd, char* logfilename, uint32_t* inp_buff, uint32_t max_total_words, uint32_t timeout){
-  FILE* logfile_ptr = fopen(logfilename, "a");
+  char logfilename_tmp[300];
+  snprintf(logfilename_tmp, sizeof(logfilename_tmp), "%s.tmp", logfilename);
+  printf("tmp file: %s ",logfilename_tmp);
+  FILE* logfile_ptr = fopen(logfilename_tmp, "a");
+
 
 //  fprintf(logfile_ptr, "0xFF00000 \n");
 //  fprintf(logfile_ptr, "0xFFFFFFF \n");
@@ -695,6 +717,7 @@ void receive_to_file(t_x502_hnd hnd, char* logfilename, uint32_t* inp_buff, uint
         printf("receive error: %d\n======================\n", recv_Err_code);
   }
   fclose(logfile_ptr);
+  rename(logfilename_tmp, logfilename);
 }
 
 
@@ -726,8 +749,9 @@ int main(int argc, char** argv) {
     main_state_set_defaults(&state);
     parse_cmd_file(cmd_filename, &state);
     // отладочный вывод принятых значений
-    printf("Parsed state: run_mode=%d, BF_mode=%d, run_length=%u, runs_N=%u, run_I=%u, data_path=%s\n",
-           (int)state.run_mode, (int)state.BF_mode, state.run_length, state.runs_N, state.run_I, state.data_path);
+    printf("Parsed state: run_mode=%d, BF_mode=%d, BlackFin_mode=%d, run_length=%u, runs_N=%u, run_I=%u, data_path=%s\n",
+           (int)state.run_mode, (int)state.BF_mode, (int)state.BlackFin_mode,
+           state.run_length, state.runs_N, state.run_I, state.data_path);
 
 /* Removed unused temporary buffers and FFT/LFSM placeholders */