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Identification Error on BS2 — Parallax Forums

Identification Error on BS2

sckamsckam Posts: 27
edited 2004-10-04 01:12 in BASIC Stamp
Dear all,
What could be the problem if I click the 'Identify', the result I got:

Identification
Device Type:
Version:
Loopback:Yes
Echo:Yes

Previously, I got this:
Identification
Device Type: BASIC Stamp 2
Version:v1.0
Loopback:Yes
Echo:Yes

I done some modification on the board,
then cause me got the above problem.

I think the BS2 still ok.Because I change to use other BS2 also same problem.

Please advise me.

Thank you.
Best regards.
Kam
hop.gif

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Thank you.

Warm regards.
Kam

Comments

  • ionion Posts: 101
    edited 2004-09-26 16:57
    Check your comunication components. Check for the 2 small 1 uF capacitors to be in place . From pin 3 on stamp ATN , you have two caps. One going to pin 4 on rs232 connector, and one going to ground.
    Did the board worked before ?
  • sckamsckam Posts: 27
    edited 2004-09-26 17:36
    Dear Ion,
    Yes,
    the board was working ok before this.

    regards.
    Kam

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    Thank you.

    Warm regards.
    Kam
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-09-26 17:57
    Check your board connections against the attached schematic.· Be sure to check for open connections as well as shorts between pins.· I suspect your ATN connection is broken since the character is being echoed back, but the BASIC Stamp is not accepting the remote reset.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office

    Post Edited (Jon Williams) : 9/26/2004 6:00:28 PM GMT
    BASIC_Stamp_Pgm_Conn.gif
    599 x 555 - 16K
  • Buck RogersBuck Rogers Posts: 2,175
    edited 2004-09-26 18:10
    Hello from Buck Rogers

    Whenever I build a circuit that will use any type of connectors for off board use, I typically follow the advice of the carpentry field. "Measure twice, cut once.". You'd be surprised how easy it is to make mistakes. Therefore I double check, sometimes triple check my connections.







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    Buck Rogers

    www.gregg.levine.name
  • sckamsckam Posts: 27
    edited 2004-09-27 16:56
    Dear all,

    I already check the connectiopn path between the Pin 3(ATN) of BS2 to path between two small 0.1uF capacitors.
    The path is ok, no broken...then what could be the next problem ?

    Please advise.
    warm regards.
    Kam

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    Thank you.

    Warm regards.
    Kam
  • K de JongK de Jong Posts: 154
    edited 2004-09-27 17:12
    Hi Kam,

    In your first post you wrote about a modification you made to your board. Could that cause your problem?

    Just a thought.

    Klaus
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-09-27 17:44
    Do you have a bad socket? Bad solder joint? Intermittant connection? ....

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2004-09-27 22:12
    I'd be curious to know what the modification was...That might shed some light...



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    Chris Savage

    Knight Designs
    324 West Main Street
    P.O. Box 97
    Montour Falls, NY 14865
    (607) 535-6777

    Business Page:·· http://www.knightdesigns.com
    Personal Page:··· http://www.lightlink.com/dream/chris
    Designs Page:··· http://www.lightlink.com/dream/designs
    ·
  • ionion Posts: 101
    edited 2004-09-27 23:55
    It is by any chance the ATN pin brocken or have a bad conection. Take a magnifier and look at the base of the pin. Then folow the trace which will endup to a 10k resistor. Put an ohmeter from there to the capacitor which goes to the rs232 pin4 . check continuity. For sure your ATN pin is disconected .
    Ion
  • sckamsckam Posts: 27
    edited 2004-09-28 19:05
    Dear all,
    I did a checked using multimeter to check the Pin 3 (ATN) to the capacitor 0.1uF, it is ok have continuity.

    I measure the voltage between Pin 4 of RS232 to Pin 3 (ATN) of BS2, it is around 10.5VDC to 11.0VDC.

    Is this normal ?

    The modification design does not effect the SOUT, SIN, ATN and VSS.
    I did measure no shorting among the SOUT, SIN, ATN and VSS.

    Also no shorting among pins at RS232.

    If the Pin 3 (ATN) is no break or no disconnect, what else can create the problem ?

    Thank you.
    Best regards.
    Kam

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    Thank you.

    Warm regards.
    Kam
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-09-28 20:24
    Maybe you killed your BASIC Stamp ... I hope not.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office
  • sckamsckam Posts: 27
    edited 2004-09-29 00:52
    Dear Jon,
    The BS2 is still functioning well because I have tested it using BOE, it is working normal, no problem at all.

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    Thank you.

    Warm regards.
    Kam
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-09-29 02:01
    Do you have a good power supply on your "broken" board? Proper connections (including ground) to the BASIC Stamp?

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office
  • ionion Posts: 101
    edited 2004-09-29 02:02
    Kam,
    What exactly did you modified on the board.It is a printed circuit board?
    Can you post the original schematic and the new one ? Did you cut some traces and solder some jumper wires to change conections ? Witout knowing what did you change it will be hard to figure out what is going on . When you changed the board, did you by mistake disconect pin 5 of DB9 from ground. Check the ground continuity on pin 5 rs232, pin 4 and 23 on stamp, and second capacitor from pin 3 which is suposed to be at ground. Did you check the power on your stamp ? On pin 21 you shoud have + 5 volts from 4 or 23.
    Look forward to see a quick answer. It is a chalenging task
    Ion
  • sckamsckam Posts: 27
    edited 2004-09-29 10:36
    Dear Ion,
    Yes, it is a Printed Circuit Board(PCB).
    Attach here the OLD schematic and NEW schematic.

    Dear Jon,
    Yes, the 9VDC is working find and there is proper ground when I measured all the grounding points, they are connect to the VR1 (78L05) GND position.

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    Thank you.

    Warm regards.
    Kam

    Post Edited (sckam) : 9/29/2004 10:48:05 AM GMT
    zip
    zip
    Old Schematic.zip
    41K
    zip
    zip
    New Schematic.zip
    48K
  • ionion Posts: 101
    edited 2004-09-29 12:57
    Kam,
    looks like you used Protel to do the design.
    I do not have it.
    can you convert the file in pdf ?
    Ion
  • sckamsckam Posts: 27
    edited 2004-09-30 00:57
    Dear Ion,

    I convert the Protel format to PDF files for you.
    Thanks in advance.

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    Thank you.

    Warm regards.
    Kam

    Post Edited (sckam) : 9/30/2004 12:59:35 AM GMT
    zip
    zip
    Old Schematic PDF.zip
    33K
    zip
    zip
    New Schematic PDF.zip
    49K
  • ionion Posts: 101
    edited 2004-09-30 03:25
    No Clue. It looks in the schematics, that you just added the PAK and used P0 to drive the clock.
    Did you made a new PCB, or just modified the old one?
    If you made a new one, what is happen if you put the same stamp in the old board?
    Just the stamp no other components. It will read the ID?
    If you just modified the old PCB, can you, temporary repair the PCB and convert it back to the original design? I do not care for the moment if the program will run or not. Let the program the way it is, just check for ID on the stamp.
    Based on this tests we can go further.
    Ion
  • ionion Posts: 101
    edited 2004-09-30 03:39
    Please send me the Gerber file for the photoploter so i can look at your board.
    How many layers board you have ? If you have more then one, check the continuity of circuit for the pads which you desoldered
    on both side of the board. Check via too.
  • K de JongK de Jong Posts: 154
    edited 2004-09-30 13:15
    Hi Kam,

    Is it correct that you use the VR1 (78L05) ?? Is that the low power version maximum 100 mA ??

    If so the current can be can be close to the maximum after you added the PAK. If so this could cause your problems.

    Just a thought.

    Regards,

    Klaus
  • sckamsckam Posts: 27
    edited 2004-10-04 01:12
    Dear Jong,

    Yes, I used the VR1(the part no:L7805CV) correctly. The Io is 500mA.
    The same problem still there even I disconnect the PAK-XII.

    Any suggestion ?

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    Thank you.

    Warm regards.
    Kam
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