One thing that we have always been missing is a video subsystem. This
would be something similar to the audio/ subsystem which is basically a
way of connecting audio streams between audio sources (like
apps/system/nxplayer), audio processors (codecs, equalizers, etc. which
would go in audio/), and audio sinks most of which are in drivers/audio
(but also apps/system/nxrecorder).
People have said that we need something like Video4Linux but I don't
really know very much about that. I also think Sony recently
contributed some video support under drivers/video but, again, I know
nothing about that really (video-related drivers should go under
drivers/video, but system video support should really go under video/).
It would be nice to get some people together who are interested in video
to develop an architecture and roadmap for video support. I can't
imagine that we would be happy with the results if we just develop video
support organically.
I say this because I spent some time developing camera support with the
SAMA5D's a few years back and was hamper because after writing the
camera driver, I really didn't know how to integrate it.
Greg
On 4/2/2021 8:30 PM, Matias N. wrote:
Thanks Alan. I'll probably give it a try.
Best,
Matias
On Fri, Apr 2, 2021, at 20:43, Alan Carvalho de Assis wrote:
Hi Matias,
No, AFAIK there is nobody working on camera support.
BR,
Alan
On 4/2/21, Matias N. <mat...@imap.cc <mailto:matias%40imap.cc>> wrote:
I've looked into this a bit further. It seems NuttX supports the OV2640
command interface (via I2C) with video/ov2640.c driver. However, the data
transfer is handled separately. From what I read, on ESP32, the I2S
peripheral is used to handle the data transfer using DMA. So this means that
an ESP32 specific driver would need to be written so that it transfers image
data using I2S.
Any chance anyone already did this? Seems a bit complex.
Best,
Matias
On Thu, Apr 1, 2021, at 12:18, Matias N. wrote:
I'm merely experimenting myself but as a test I will try to read the
camera and offer images via a webserver. I believe the camea is supported
in NuttX already.
Best,
Matias
On Thu, Apr 1, 2021, at 11:40, Grr wrote:
I have a bunch of those modules I plan to use as security cameras and
automation control nodes, preferably under NuttX, so I have a couple of
questions:
1-How far away is the camera support?
2-How about WiFi?
TIA
Grr
El jue, 1 abr 2021 a las 8:34, Matias N. (<mat...@imap.cc
<mailto:matias%40imap.cc>>) escribió:
__
Yeah, I was under the impression it was single core due to the "S" as in
the figure below. But you're right
that ESP32-S is not a valid Espressif part number. This is the module I
was refering to:
It makes sense that it is actually the normal dual-core chip inside.
Best,
Matias
On Thu, Apr 1, 2021, at 11:23, Sara da Cunha Monteiro de Souza wrote:
Besides that,
here we can see all the "official" series of Espressif:
https://www.espressif.com/sites/default/files/documentation/espressif_products_ordering_information_en.pdf
Or a more simple and interactive way, using the product selector:
https://products.espressif.com/#/product-selector
So, ESP32S or ESP32-S modules are from third party.
Em qui., 1 de abr. de 2021 às 11:14, Sara da Cunha Monteiro de Souza
<saramonteirosouz...@gmail.com <mailto:saramonteirosouza44%40gmail.com>>
escreveu:
Hi Matias,
These devkits with cameras and sd card slot with ESP32S modules are
third party modules and the S doesn't necessarily stand for "single
core".
I recommend take a look at this post to see the differences between
different devkits:
https://diyprojects.io/esp32-cam-which-model-choose-esp-eye-aithinker-ttgo-tcamera-m5stack/#.YFJoh-1KhH4.
FY, this is how you can interpret Part numbers of ESP32 modules :
image.png
And if you don't have this information and you have the devkit on
hands, you can use esptool to discover this information from your
ESP32
by using the following command:
esptool.py --port /dev/ttyUSB0 chip_id
You should have something like this:
Serial port /dev/ttyUSB0 Connecting..... Detecting chip type... ESP32
Chip is ESP32-D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core,
240MHz, VRef calibration in efuse, Coding Scheme None Crystal is 40MHz
MAC: 9c:9c:1f:ea:6e:5c
It can be very useful to know other information as you can see, for
example, the chip revision.
But regarding the support for this DevKit, the board implementation is
relatively simple, but we still
don't have the I2S driver for the camera.
Em qui., 1 de abr. de 2021 às 10:49, Matias N. <mat...@imap.cc
<mailto:matias%40imap.cc>>
escreveu:
Hi,
I'm considering buying one of those ESP32 modules which includes the
camera and SD card and I noticed it seems it comes with a single-core
variant of the typical ESP32 module.
I looked around NuttX and I think there's no explicit support yet but
I imagine it shouldn't be hard to add, right?
Best,
Matias
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