BUGFIX: Do not expect responses for zero size transfers since they are suppressed

hdl/psi_ms_daq_daq_sm.vhd

@@ -438,8 +438,11 @@ begin
 			when NextWin_s =>
 				-- Default Values
 				v.HndlPtr2 := r.HndlPtr1;
-				-- Switch to next window if required
-				v.IrqFifoWrite	:= '1';
+				-- Do not wait for "transfer done" for zero size transfers (they are not passed to the memory interface)
+				if unsigned(Dma_Resp.Size) /= 0 then
+					v.IrqFifoWrite	:= '1';
+				end if;
+				-- Switch to next window if required				
 				if ((r.HndlPtr1 = r.HndlWinEnd) and (r.HndlRingbuf = '0')) or (Dma_Resp.Trigger = '1') then					
 					v.HndlWinDone := '1';
 					v.NewBuffer(r.HndlStream) := '1';