Does anyone have experience replacing the surface mount AT25256 EEPROM
on a BasicX-24 Module?
Mine is bad (NetMedia refuses to replace the BasicX Module) and I'm
deciding between replacing the EEPROM, or buying a Systronics JStamp (the
JStamp is more expensive, but substantially more powerful
http://www.systronix.com/jstamp/)
I don't have any experience with surface mount soldering, but I
suppose I could do it if I had the proper tools (I have a regular 30W
pencil iron and a Weller 150/230W gun, but both are way too big for surface
mount work.) I'd appreciate any advice. Thank you.
Good Luck!
Ken_S.
At 07:46 PM 3/9/2005, you wrote:
>Don;
>
> >When I run your program on a current production BX-24, the read and
> >written values are the same (as expected).
>
> Thanks! Then only conclusion I can come to is that my BasicX-24 is
>bad. Anyone else agree/disagree?
>
> I had sent it back once already because I had trouble getting it to
>take downloads. Often I have to try three to five times (sometimes more)
>before it will verify okay. One night I tried for over an hour and it
>never took it. I discussed it with NetMedia Support (I explained the
>signals I saw on my O-Scope for pins 1, 2, and 3 of the BasicX Module,
and
>the signals on pins 1, 2, 5, and 6 of the EEPROM chip) and they agreed to
>replace it. However, they sent it back saying they tested it and there
was
>no problem with it. It continues to take multiple downloads to verify
>okay, and data saved to the unusued area of the EEPROM (data-logging)
comes
>back as garbage.
>
> Any advice on working with NetMedia a second time?
> Thank you.
> Ken_S.
>
>At 04:33 PM 3/9/2005, you wrote:
>
> >When I run your program on a current production BX-24, the read and
> >written values are the same (as expected).
> >
> >Don
>At 08:28 PM 3/8/2005, you wrote:
> > I'm having a problem writing/reading to/from the EEPROM.
I've come to
> >the conclusion that either...
> >
> > 1) My BasicX-24 has gone kaput.
> > or
> > 2) I am missing something very simple.
> >
> > Would someone mind running this program and tell me what they get
for
> >an output? Seems to me that what I write to the EEPROM should
exactly
> >match what I read back.
> >
>
>'************************************************************************
> ******
> >Option Explicit
> >Option Strict On
> >
> >Private Const ciELEMENT_SIZE As Integer = 2 '*** Integers take two
Bytes ***
> >Private Const clHIGHEST_EEPROM_ADDRESS As Long = 32765
> >Private Const clLOWEST_EEPROM_ADDRESS As Long = 32700
> >Private lAddress As Long
> >
> >Public Sub Main()
> > Dim iX As Integer
> > Dim iX2 As Integer
> >
> > Debug.Print "Begin"
> > lAddress = clLOWEST_EEPROM_ADDRESS
> > Do While ( lAddress < clHIGHEST_EEPROM_ADDRESS )
> > Debug.Print "Address="; CStr(lAddress); ", ";
> > iX = CInt(Rnd() * 65536.0 - 32767.0)
> > Call PutEEPROM(lAddress, iX, ciELEMENT_SIZE)
> > Debug.Print "iX="; CStr(iX); ", ";
> > iX2 = 0
> > Call GetEEPROM(lAddress, iX2, ciELEMENT_SIZE)
> > Debug.Print "X2="; CStr(iX2)
> > lAddress = lAddress + CLng(ciELEMENT_SIZE)
> > Loop
> > Debug.Print "End"
> >End Sub
>
>'************************************************************************
> ******
> >
> > I'm getting data like this...
>
>'************************************************************************
> ******
> >Begin
> >Address2700, iX=-29521, X21919
> >Address2702, iX563, X2563
> >Address2704, iX&323, X2=-20269
> >Address2706, iX 595, X2$947
> >Address2708, iX 272, X2=-21200
> >Address2710, iX=-20477, X2=-30973
> >Address2712, iX506, X2=-23686
> >Address2714, iX=-18517, X2'563
> >Address2716, iX=-684, X2=-684
> >Address2718, iX044, X2=-18260
> >Address2720, iX%988, X2=-28540
> >Address2722, iX=-30543, X2=-5711
> >Address2724, iX=-6199, X2=-26167
> >Address2726, iX4, X22
> >Address2728, iX333, X2501
> >Address2730, iX!74, X2I90
> >Address2732, iX"580, X2=-22220
> >Address2734, iX2268, X2(172
> >Address2736, iX=-1541, X2=-11269
> >Address2738, iX=-24806, X2874
> >Address2740, iX772, X22484
> >Address2742, iX609, X2609
> >Address2744, iX=-27513, X2239
> >Address2746, iX=-10857, X2=-30057
> >Address2748, iX2301, X2"317
> >Address2750, iX=-31563, X2821
> >Address2752, iX%130, X2=-10710
> >Address2754, iX2065, X2=-3775
> >Address2756, iX=-10435, X2=-23747
> >Address2758, iX=-26539, X2=-11179
> >Address2760, iX=-27313, X2=-27313
> >Address2762, iX774, X2=-2354
> >Address2764, iXy21, X2=-15
> >End
>
>'************************************************************************
> ******
> >
> > Shouldn't iX be equal to iX2? As you can see from the above data
they
> >do NOT match. Please tell me if my BasicX is bad, or what I'm
doing wrong
> >in my program.
> >
> > Thank you.
> > Ken_S.
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