Add optional reset-before-request-data

bin/mbus-serial-request-data-multi-reply.c

@@ -14,6 +14,7 @@
 #include <mbus/mbus.h>
 
 static int debug = 0;
+static int reset = 0;
 
 // Default value for the maximum number of frames
 #define MAXFRAMES 16
@@ -28,6 +29,7 @@ parse_abort(char **argv)
  fprintf(stderr, " optional flag -d for debug printout\n");
  fprintf(stderr, " optional flag -b for selecting baudrate\n");
  fprintf(stderr, " optional flag -f for selecting the maximal number of frames\n");
+ fprintf(stderr, " optional flag -r to reset (SND_NKE) the device before querying. Silenty ignored for secondary addresses.\n");
  exit(1);
 }
 
@@ -53,6 +55,10 @@ main(int argc, char **argv)
  {
  debug = 1;
  }
+ else if (strcmp(argv[c], "-r") == 0)
+ {
+ reset = 1;
+ }
  else if (strcmp(argv[c], "-b") == 0)
  {
  c++;
@@ -147,6 +153,19 @@ main(int argc, char **argv)
  {
  // primary addressing
  address = atoi(addr_str);
+ if (reset) {
+ // send a reset SND_NKE to the device before requesting data
+ // this does not make sense for devices that are accessed by secondary addressing
+ // as the reset de-selects the device
+ if (mbus_send_ping_frame(handle, address, 1) == -1)
+ {
+ fprintf(stderr,"Failed to init slave.\n");
+ mbus_disconnect(handle);
+ mbus_context_free(handle);
+ mbus_frame_free(reply.next);
+ return 1;
+ }
+ }
  }
 
  // instead of the send and recv, use this sendrecv function that