Had this exact problem. Whet away completely as soon as I made sure
that the common ground of the BX24 board (I'm using a breadboard right
now) was tied to the ground system of the PC (via the RS-232 ground
pin). You have to have a common reference ground between the two
systems or else what they consider to be "+5V" gets ambigiious
(RS-232
should be +/- 12v, but the BX24 is running it on a 5v system, so it's
going to be sensitive to this).
BX24 pin 4 HAS to be grounded to both the PC's ground (via RS-232 pin
#5) AND your common ground from the BX24 power supply.
--jeff r--
--- In , "enriquei2001" <ldcases@h...> wrote: >
> I am using winXP and com port 3. I get Error code 217
> and Unable to halt messages when I try to download a simple LED
> program...but for some reason every now and then I get EEPROM
> download error -
> *** Opening file: C:\Program Files\BasicX\Project1.bxb
>
> *** Downloading File
>
> Writing internal EEPROM
> Write failed
> Writing external EEPROM
> Verifying external EEPROM
> Verify failed, retrying
> Verify failed
>
> *** Download Error
> -----------------
>
> Error writing to internal EEPROM
>
> Error verifying external EEPROM:
> Serial input timed out
>
> -----------------
> The board is good and I've tried 3 different BX24's !!
> Let me know if anyone else has had this problem...any ideas or
> solutions???
> Enrique ---> ldcases@h...
Reply by Bob Roos●June 3, 20042004-06-03
I too have had this on occasion.
Several times I got around it by adding an earth ground, but they say that
is not necessary.
I have one board that will give me this error regularly. I put a scope on
it to see if there was a problem on the input and it would never fail with
the scope probe hooked onto the resistor from the DB9 pin to the 74HC04.
I don't know what is going on, but the chips are not faulty because they
work just fine in other boards.
Make sure that your pin 5 is well grounded.
Sorry I can't be more help but I really don't know a definite
cause.
Bob Roos
On Thu, 03 Jun 2004 15:44:05 -0000, enriquei2001 <>
wrote:
>
> I am using winXP and com port 3. I get Error code 217
> and Unable to halt messages when I try to download a simple LED
> program...but for some reason every now and then I get EEPROM
> download error -
> *** Opening file: C:\Program Files\BasicX\Project1.bxb
>
> *** Downloading File
>
> Writing internal EEPROM
> Write failed
> Writing external EEPROM
> Verifying external EEPROM
> Verify failed, retrying
> Verify failed
>
> *** Download Error
> -----------------
>
> Error writing to internal EEPROM
>
> Error verifying external EEPROM:
> Serial input timed out
>
> -----------------
> The board is good and I've tried 3 different BX24's !!
> Let me know if anyone else has had this problem...any ideas or
> solutions???
> Enrique ---
> Yahoo! Groups Links
>
> To
Reply by enriquei2001●June 3, 20042004-06-03
I am using winXP and com port 3. I get Error code 217
and Unable to halt messages when I try to download a simple LED
program...but for some reason every now and then I get EEPROM
download error -
*** Opening file: C:\Program Files\BasicX\Project1.bxb
Error verifying external EEPROM:
Serial input timed out
-----------------
The board is good and I've tried 3 different BX24's !!
Let me know if anyone else has had this problem...any ideas or
solutions???
Enrique ---