Fast Scan Ncurses Tweak; Update Literature;

examples/Example_Usage.md

@@ -16,6 +16,24 @@
 -fx X2-TDMA
 ```
 
+## New -- Experimental Conventional Frequency "Fast Scanner"
+This feature is used to allow DSD-FME to use RIGCTL or RTL input and cycle through frequencies as fast as possible to attain a frame sync. 
+
+This works almost identically to how the trunkng methods work, but instead of locking onto a control channel and tuning based on its decoding, it rapidly tunes through all loaded frequencies in a CSV file and stops when it finds a frame sync. This method is meant for loading a bunch of conventional non-trunking frequencies that signal only when voice or short data bursts are present (DMR T2, Conventional P25 P1, Conventional NXDN, etc) and decode them until the frame sync stops and then resume its scan. This method uses SDR++ RIGCTL, or RTL internal handling to go through signal. -Y is the fast scanner switch.
+
+To scan through a mixture of DMR and P25 Conventional, use:
+`dsd-fme -i tcp -C channel_map.csv -G group.csv -Y -U 4532 -N 2> log.ans` 
+
+To scan through NXDN48 only conventional, use: 
+`dsd-fme -fi -i tcp -C channel_map.csv -Y -U 4532 -N 2> log.ans` 
+
+To scan through NXDN98 only conventional, use: 
+`dsd-fme -fn -i tcp -C channel_map.csv -Y -U 4532 -N 2> log.ans`
+
+The Channel Map setup will be identical to any of the channel maps found for trunking systems, channel numbers do not matter and can be arbitrarily organized, and frequencies can be duplicated to be 'scanned' more frequently in larger CSV files. Scan speed is purely set by your CPU/GPU, and also by other factors like using SDR++ server to connect to a SDR++ client, or RTL_TCP server to client, etc, so faster computers scan faster, and slower will scan slower, slower scans may require multiple duplicate entries into your scanner csv file if you make a really large one.
+
+Please Note: DMR Simplex may not behave well on fast scan, I have not been able to test it as such, but given the nature of the on-off timeslot signalling on DMR Simplex, missed frame syncs and skipping/resuming scan may occur.
+
 ## Trunking Examples
 Please see trunking.sh for sample start up scripts or scroll down to the bottom for more explanation.
 

src/dsd_ncurses.c

@@ -2162,7 +2162,9 @@ ncursesPrinter (dsd_opts * opts, dsd_state * state)
   if (opts->scanner_mode == 1)
   {
     printw ("| Fast Scan Mode Enabled ");
+    if (state->trunk_lcn_freq[state->lcn_freq_roll]) //this is a workaround to fix freq of 0 during roll reset
       printw (" - Frequency: [%.06lf] Mhz \n", (double)state->trunk_lcn_freq[state->lcn_freq_roll]/1000000);
+    else printw (" - Frequency: [%.06lf] Mhz \n", (double)state->trunk_lcn_freq[0]/1000000); 
   } 
 
   printw ("------------------------------------------------------------------------------\n");