Re: Self test results

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Re: Re: Self test results

Postby dmmedia » Mon Dec 26, 2011 10:44 am

Thanks for the hint. Has the same problem with Free PCB built Bus Pirate. Made a solder joint and all tests started to pass.
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Re: Self test results

Postby Dillon1337 » Mon Jan 02, 2012 11:11 pm

I have a self-assembled Bus Pirate v3.5 from a free PCB. It is on Firmware v5.10 (r559) and Bootloader v4.4
There is two problems below with the 3.3V voltage regulator:

Code: Select all
Connect (Vpu to +5V) and (ADC to +3.3V)
Space to continue
Ctrl
AUX OK
MODE LED OK
PULLUP H OK
PULLUP L OK
VREG OK
ADC and supply
5V(4.88) OK
VPU(4.92) OK
3.3V(5.41) FAIL
ADC(2.54) FAIL
Bus high
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 0
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 1
MOSI OK
CLK OK
MISO OK
CS OK
MODE and VREG LEDs should be on!


I saw an earlier post when somebody had similar problems that you told to go into mode 2 and do a few tests and these are my results:

If you go into a mode (m, 2) and enable the power supplies (W) does the VREG LED light?
Yes it does
VREG is attached to the 3v3 supply. Also, the Bus Pirate measures the voltage after the 'W' command, and if it is too low it should complain about a short.
No complaints
If you now press 'v' to get a voltage report, what do the 3.3volt and ADC report?
3.3v = 5.45v
ADC = 2.67v

What does the ADC measure (d) when unconnected?
ADC = 0v
Now connect the 3v3 to ADC and press d, what is the reading?
ADC = 2.57V
Now connect 5v0 to the ADC and press d, what is the reading?
ADC = 5.07V


Any help would be appreciated.
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Re: Self test results

Postby tayken » Tue Jan 03, 2012 1:10 am

Dillon1337 wrote:If you now press 'v' to get a voltage report, what do the 3.3volt and ADC report?
3.3v = 5.45v
ADC = 2.67v

Any help would be appreciated.

That part kinda worries me. Did you do any part substitution? And are you sure that you have a 3.3V regulator, not a 5V regulator? How about the resistors in front of ADC?
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Re: Re: Self test results

Postby ian » Tue Jan 03, 2012 1:48 am

Hi Dillon,

And are you sure that you have a 3.3V regulator, not a 5V regulator? How about the resistors in front of ADC?


This is where I would start looking too. Maybe the voltage dividing resistors have a short or unsoldered lead?
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Re: Self test results

Postby bananbr » Wed Jan 18, 2012 7:27 am

Folks,
Here are my results:
Bus Pirate v3b
Firmware v5.10 (r559) Bootloader v4.4
DEVID:0x0447 REVID:0x3043 (24FJ64GA002 B5)
http://dangerousprototypes.com

HiZ>~
Disconnect any devices
Connect (Vpu to +5V) and (ADC to +3.3V)
Space to continue
Ctrl
AUX OK
MODE LED OK
PULLUP H OK
PULLUP L OK
VREG OK
ADC and supply
5V(4.98) OK
VPU(0.00) FAIL
3.3V(3.20) OK
ADC(0.00) FAIL
Bus high
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 0
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 1
MOSI FAIL
CLK FAIL
MISO FAIL
CS FAIL
MODE and VREG LEDs should be on!
Any key to exit
Found 6 errors.

1-WIRE>W
Power supplies ON
1-WIRE>v
Pinstates:
1.(BR) 2.(RD) 3.(OR) 4.(YW) 5.(GN) 6.(BL) 7.(PU) 8.(GR) 9.(WT) 0.(Blk)
GND 3.3V 5.0V ADC VPU AUX - OWD - -
P P P I I I I I I I
GND 3.20V 4.98V 0.00V 0.00V L L L L L

What could be wrong ?
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Re: Self test results

Postby Sjaak » Wed Jan 18, 2012 7:29 am

My guess is you forget the jumpers between Vpu and 5v and 3v3 and adc :)
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Re: Re: Self test results

Postby bananbr » Wed Jan 18, 2012 7:47 am

Actually i´ve just made a test with real jumpers and it worked just fine, probably the problem is with the probes I was using before.
Thx guys
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Re: Self test results

Postby Sjaak » Wed Jan 18, 2012 8:47 am

bananbr wrote:Actually i´ve just made a test with real jumpers and it worked just fine, probably the problem is with the probes I was using before.
Thx guys


Congrats on getting it to work. Happy hacking ;)
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Re: Re: Self test results

Postby emrum » Wed Feb 08, 2012 6:22 am

my output

(VPU and 5V connected)
Code: Select all
AUX OK
...
VREG OK
ADC and supply
5V(4.47) FAIL
VPU(4.49) OK
...
Any key to exit

Found 1 errors.


Which IC should I check / replace ?


(with VPU and 5V __DISCONNECTED__ :)
Code: Select all
ADC and supply
5V(4.47) FAIL
VPU(0.00) FAIL
3.3V(3.33) OK
ADC(3.47) OK
Bus high
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 0
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 1
MOSI FAIL
CLK FAIL
MISO FAIL
CS FAIL
MODE and VREG LEDs should be on!
Any key to exit
Found 6 errors.
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Re: Re: Self test results

Postby ian » Wed Feb 08, 2012 6:26 am

Hi Emrum,

It looks like your USB port has a low supply voltage, but still within spec (min 4.1volts). I don't think replacing anything would help.
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Re: Re: Self test results

Postby emrum » Wed Feb 08, 2012 6:33 am

ok, thanks
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Re: Self test results

Postby dydyt » Tue Dec 04, 2012 8:36 pm

Bus pirate v3.6

Firmware BPv3-Firmware-v5.10

Code: Select all
HiZ>~
Disconnect any devices
Connect (Vpu to +5V) and (ADC to +3.3V)
Space to continue
Ctrl
AUX OK
MODE LED OK
PULLUP H OK
PULLUP L OK
VREG OK
ADC and supply
5V(1.16) FAIL
VPU(1.15) FAIL
3.3V(3.26) OK
ADC(3.39) OK
Bus high
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 0
MOSI OK
CLK OK
MISO OK
CS OK
Bus Hi-Z 1
MOSI FAIL
CLK FAIL
MISO FAIL
CS FAIL
MODE and VREG LEDs should be on!
Any key to exit
Found 6 errors.


Whats wrong ?
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Re: Re: Self test results

Postby tayken » Tue Dec 04, 2012 11:38 pm

Hey dydyt,

I believe that is caused by the 5 V regulator (VR3). But first, can you upgrade to the latest firmware and try again?
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Re: Re: Self test results

Postby ian » Wed Dec 05, 2012 1:29 am

Hi dydyt,

It looks like the 5volt regulator is having a problem. It could be:
1. Self test jumpers not connected correctly
2. 5volts is shorted to ground somewhere (bad PCB or solder bridge on pins)
3. Bad regulator

Is it a Seeed Studio board? If so please contact them for a replacement and reference this thread. I'm sorry about the defective board.
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PICTURE OWNERSHIP

Postby wagnerlip » Thu Jul 31, 2014 2:44 pm

The picture above, about the SMT bridge,
ustr . sancaleve . com / smt / smd006.jpg
is of my production, I never authorize its use in this forum, and more, at the top of my webpage
ustr . sancaleve . com / smt / index.htm
there is a text saying to link the photo, not copying.

It is a common sense to at least indicate the source of such picture.
Thanks.
Wagner Lipnharski
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