Refs #165.

- Added protection against zero division.

git-svn-id: https://svn.code.sf.net/p/openblt/code/trunk@182 5dc33758-31d5-4daf-9ae8-b24bf3d40d73

Host/Source/MicroBoot/interfaces/uart/XcpTransport.pas

@@ -247,13 +247,13 @@ begin
     rxCnt := 0;
     packetLen := 0;
 
+    // only attempt to receive the remainder of the packet if its length is valid
+    if resLen > 0 then
+    begin
       // re-confgure the reception timeout now that the total packet length is known.
       // timeout = (MULTIPLIER) * number_of_bytes + CONSTANT
       sciDriver.Timeouts.ReadTotalConstant := 0;
-    if timeOutms > 0 then
-      sciDriver.Timeouts.ReadTotalMultiplier := timeOutms div resLen
-    else
-      sciDriver.Timeouts.ReadTotalMultiplier := timeOutms;
+      sciDriver.Timeouts.ReadTotalMultiplier := timeOutms div resLen;
 
       // attempt to receive the bytes of the response packet one by one
       while (rxCnt < resLen) and (GetTickCount < dwEnd) do
@@ -274,6 +274,7 @@ begin
         result := true;
       end;
     end;
+  end;
 end; //*** end of SendPacket ***