fp550.rb in extface-0.5.1

- old
+ new

@@ -5,10 +5,11 @@
     RESPONSE_TIMEOUT = 3  #seconds
     INVALID_FRAME_RETRIES = 6  #count (bad length, bad checksum)
     ACKS_MAX_WAIT = 60 #count / nothing is forever
     NAKS_MAX_COUNT = 3 #count
     BAD_SEQ_MAX_COUNT = 3
+    NO_RESP_MAX_COUNT = 3
     
     TAX_GROUPS_MAP = {
       1 => "\xc0",
       2 => "\xc1",
       3 => "\xc2",
@@ -171,10 +172,12 @@
     def fsend(cmd, data = "") #return data or nil
       packet_data = build_packet(cmd, data) #store packet to be able to re-transmit it with the same sequence number
       result = false
       invalid_frames = 0 #counter for bad responses
       nak_messages = 0 #counter for rejected packets (should re-transmit the packet)
+      no_resp = 0
+      flush #prevent double packet response issue like daisy driver
       push packet_data #send packet
       ACKS_MAX_WAIT.times do |retries|
         errors.clear
         if resp = frecv(RESPONSE_TIMEOUT)
           if resp.valid?
@@ -198,9 +201,16 @@
                 errors.add :base, "#{INVALID_FRAME_RETRIES} Broken Packets Received. Abort!"
                 break
               end
             end
             push packet_data unless resp.ack?
+          end
+        else
+          no_resp += 1
+          if no_resp > NO_RESP_MAX_COUNT
+            p "No reply in #{NO_RESP_MAX_COUNT * RESPONSE_TIMEOUT} seconds. Abort!"
+            errors.add :base, "No reply in #{NO_RESP_MAX_COUNT * RESPONSE_TIMEOUT} seconds. Abort!"
+            return result
           end
         end
         errors.add :base, "#{ACKS_MAX_WAIT} ACKs Received. Abort!"
       end
       return result
\ No newline at end of file