[Elphel-support] Script for changing the SADDR bit for the MT9P031 sensor

Thu Mar 15 07:53:46 PDT 2018

Andrey,

The supply current drawn is nearly 2.0 Amps @ 3.3V, once the FPGA is loaded.
I have the 10389 interface board but no SSD mounted and no external SATA
drive attached at the moment.

When I received the camera kit, I found that the unit was especially hot
when touching it.
I don't have the camera enclosure, but only an aluminium frame on which the
boards are mounted. I guess that the frame serves as a heat sink at same
time?

For the power board failure, maybe I accidentally created a short when I
plug/unplugged the wall adapter from the power board connector while the
power adapter was plugged into the wall...

It is hard to tell what component failed on the power board because many
components are mounted underneath the Traco DC-DC converter itself...

When I plug the 48 V source, no 3.3V appears at the output.

Frederick

On Thu, Mar 15, 2018 at 10:29 AM, Elphel Support <
support-list at support.elphel.com> wrote:

> Hello Frederick,
>
> Do you know power consumption on the ports? Do you have 10389 interface
> board with the SSD? If you run camera from the 3.3V - can you measure the
> total 3.3V current? Do you have sufficient fan cooling or heat sink?
>
> We never had 10385 failures before - Traco DC-DC converter seems to have
> all required protection - current, temperature so we had the system shut
> down when overloaded, but not failed. We would like to try to find out -
> what component actually failed - is it DC-DC or something else.
>
> We do have a new power supply design (https://wiki.elphel.com/wiki/10386
> - temporary images are for 10385B), but it is not built yet., we just
> released the PCB design a few days ago.
>
> Andrey
>
> ---- On Thu, 15 Mar 2018 06:38:07 -0700 *Frederick Gamache
> <frederick.gamache at gmail.com <frederick.gamache at gmail.com>>* wrote ----
>
> Hi,
>
> Its seems that my power board (10385-B power board - 48V) is out of
> service and I'm now powering the 3.3V  from an external power supply.
> Do I really need the 10385-B power board to supply the SATA adapter board
> (10389-B) or should it works ok from my external 3.3V power source?
>
> Frederick
>
>
> On Wed, Mar 14, 2018 at 11:10 AM, Frederick Gamache <
> frederick.gamache at gmail.com> wrote:
>
> Hello Andrey,
>
> I owe at least this for your great support.
> By the way, congratulations for your great products!
>
> Best regards,
> Frederick
>
> On Wed, Mar 14, 2018 at 10:53 AM, Elphel Support <
> support-list at support.elphel.com> wrote:
>
> Frederick,
>
> Thank you for letting us know it did work. Sometimes the only indication
> of the problem being solved is the lack of the continuation in the thread.
>
> Andrey
>
> ---- On Wed, 14 Mar 2018 07:12:13 -0700 *Frederick Gamache
> <frederick.gamache at gmail.com <frederick.gamache at gmail.com>>* wrote ----
>
> Hello,
>
> Just to let you know guys that my circuit is now working since I mounted
> my DC-DC converter on my PCB.
>
> Many thanks for your support!
> Frederick
>
> On Tue, Mar 13, 2018 at 12:18 PM, Elphel Support <
> support-list at support.elphel.com> wrote:
>
> Frederick,
>
> Yes - your last problem (system getting stuck after bitstream) is caused
> by the wrong power sequencing. But as 1) you have 10338 working and 2) your
> board is tested w/o 10393 it should be working together eventually.
>
> Andrey
>
> ---- On Tue, 13 Mar 2018 07:48:42 -0700 *Frederick
> Gamache<frederick.gamache at gmail.com <frederick.gamache at gmail.com>>* wrote
> ----
>
> Hello Andrey,
>
> Normally I have a dc-dc converter chip on my pcb which translate 3.3V to
> 2.8V.
> The 3.3V source is provided by the cable attached to the 10393.
>
> I'll wait to receive my chip today and will install it tomorrow. I'll see
> if things will get better with it.
>
> Currently I'm using an external power supply to source the 2.8V voltage so
> I guess the timing for the power sequence is not ok.
>
> Frederick
>
> On Fri, Mar 9, 2018 at 5:51 PM, Elphel Support <
> support-list at support.elphel.com> wrote:
>
> Fred,
>
> Just to clarify: 10393 can drive up to ~1.0A, but there will be voltage
> drop on the cable (Elphel cables have thick power traces). Connector is
> rated 0.4A/pin. The sensor power is controlled by the script (same one that
> loads bitstream), power status/control is available over the sysfs
> interface.
>
> You may also put a buffer on all signals from the sensor, FPGA has
> flexible means to compensate pin delays if needed after the buffer
> insertion.
>
> Andrey
>
> ---- On Fri, 09 Mar 2018 14:26:50 -0800 *Elphel
> Support<support-list at support.elphel.com <support-list at support.elphel.com>>*
> wrote ----
>
> Frederick, you need to power you board either directly from the 10393 3.3V
> on the cable, or (if you board has other components that need more power
> than 10393 can provide) use external power switch driven by the cable power.
>
> The problem is that the cable goes directly to the FPGA port that should
> be powered _before_ any non-zero voltage appears on the FPGA pins. This is
> a feature of the FPGA.
>
> Andrey
>
> ---- On Fri, 09 Mar 2018 13:47:51 -0800 *Frederick Gamache
> <frederick.gamache at gmail.com <frederick.gamache at gmail.com>>* wrote ----
>
> I use TeraTerm.
>
> I receive something else than 0xffff, but it seam to be the same value for
> any register...
>
> Maybe I should check my power on my sensor chip.
>
> FPGA bitstream stalls, it doesn't initialize if I power on my sensor PCB.
>
> Fred
>
> On Fri, Mar 9, 2018 at 4:37 PM, Oleg <support-list at support.elphel.com>
> wrote:
>
> Hi,
>
>
> Question: does the software needs to reach the  34VL02 EEPROM at any point?
> Because I don't have one on my own sensor board...
>
>
> It should work fine without eeprom.
>
> Did it read chip id? or is it 0xffff? Do you use minicom or putty or other
> terminal program?
>
> Regards,
> Oleg
>
>
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