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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 ---

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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 Sponsor > ADVERTISEMENT > > Yahoo! Groups Links > > To

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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...

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