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

[Frederick Gamache]

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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