[avrdude-dev] Butterfly proposal: Exit upgrade function

[Martin Thomas]

Hello,

I've tested the avrdude cvs code with the AVR Butterfly.
Everything works as expected but the Butterflys Bootloader
stays in "command receive mode" with the current avrdude
since the function "Exit upgrade" is never called by avrdude
as far as I can see this from the code. 
With an added call for "exit upgrade" it is no longer necessary
to reset the BF after a firmware update with avrdude.
I suppose 'E' is sent by AVRPROG when pressing the 
[Exit] button. So the butterfly_close functions might be a good 
place to add the call.

Proposal: in butterfly.c
 static void butterfly_close(PROGRAMMER * pgm)
 {
   no_show_func_info();

   butterfly_leave_prog_mode(pgm);+  butterfly_send(pgm, "E", 1);
   serial_close(pgm->fd);
   pgm->fd = -1;
 }Martin