Ekko,
It has been a while since I have dealt with this kind of issue with the digital coms, but I have run into this. The problem I found was that there was not enough data in the file to feed the packetizer properly. There are probably several work arounds for this, but the simplest would be to pad the data up to the exact amount the packetizer needs to generate the packets and send them along. You can check if this is the case by varying the size of your file. If you change the number of bytes in the file, you should see the amount left out varying; if you add bytes slowly you should see a breakover point near a multiple of the number of bits the packetizer needs that will create a small or no amount of data not transmitted.
Michael
From: address@hidden [mailto:address@hidden On Behalf Of Ekko
Sent: Wednesday, January 06, 2016 9:01 AM
To: address@hidden
Subject: [Discuss-gnuradio] how to send a complete file
hello
I'm using gnuradio to simulation the gmsk tx/rx with a file
this is my grc
you can see ,i am using a file_sink and file_source,
the file_source is set to not repeat,i want to send this file ony one time.
and my source file‘s size is 140KB
after i run this grc (i am sure the send is stop )
i check the dest file,the size of whitch is 139.3KB
then i compare two file
just like
we can see that some data is lost(exactly 22 lines)，
so i want to know how can i send a complete file, just i send 140KB,and recieved 140KB,
then stop.
thank you
-Ekko