Documentation Requests/Feedback

ESP_Lvxinyue
Posts: 35
Joined: Fri Dec 25, 2015 6:13 am

Re: Documentation Requests/Feedback

Postby ESP_Lvxinyue » Thu Mar 19, 2020 4:37 am

jgustavoam wrote:
Wed Jan 29, 2020 1:06 am
Hi Everyone,
I don't know if here is the best place to report errors in documentation.
But I found one simple and single error in :

ESP32 Technical Reference Manual version 4.1

12.4.6 I²S Master/Slave Mode
"The I2S_RX_START bit of register I2S_CONF_REG is used to enable a receive operation. When I²S is in master
transmitting mode and this bit is set, the module will keep driving the clock signal and sampling the input data
stream until this bit is reset. If I²S is configured to slave receiving mode and this bit is set, the receiving module
will wait for the master BCK clock to enable a receiving operation."

I think the correct is :
When I²S is in master RECEIVING mode and this bit is set, the module will keep driving the clock signal and sampling the input data
stream until this bit is reset.
Hi,

Thanks for reporting this issue! It'll be fixed in the next TRM release.

You are welcome to submit feedback either on this forum or using our newly-established document feedback form on espressif.com: https://www.espressif.com/en/company/do ... n_feedback

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jgustavoam
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Location: Belo Horizonte , Brazil
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Re: Documentation Requests/Feedback

Postby jgustavoam » Thu Mar 19, 2020 1:59 pm

Hi ESP_Lvxinyue,
I found more issues! I will post as soon as possible.
Thanks
Gustavo Murta
Retired IBM Brasil
Electronic hobbyist since 1976.

mikronauts
Posts: 20
Joined: Wed Dec 09, 2015 8:11 pm

Re: Documentation Requests/Feedback

Postby mikronauts » Thu Mar 19, 2020 3:22 pm

Full assembly language reference please.

I have a nice optimizing basic compiler I wrote a few years ago, and I would like to port it to the Esp32.

First pass would be an efficient byte code interpreter.

Second pass would be a native code optimizing compiler.

Without having the assembly language reference I will not port the compiler as a C version of the byte code interpreter is much slower than an optimized assembly language version.

I initially wrote the compiler for the Parallax P2 "Hot" fpga prototype, but shelved it when they radically changed the architecture.

ESP_Sprite
Posts: 3733
Joined: Thu Nov 26, 2015 4:08 am

Re: Documentation Requests/Feedback

Postby ESP_Sprite » Sun Mar 22, 2020 11:43 am

Sorry, the current status of the assembly language reference is that we do not have the rights to publish that as we are not its owners; we did not develop the Xtensa ISA ourselves, so we're dependent on the owners of that ISA to release those docs.

zero0d
Posts: 4
Joined: Thu Feb 21, 2019 11:10 am

Re: Documentation Requests/Feedback

Postby zero0d » Sun Jul 05, 2020 8:16 am

Hi All,

can you tell why is there no camera DVP interface documentation for ESP32-S2 ?

Can you tell which pins can be used for D0 to D15, VSYNC, HREF, PCLK ?
Also there is only one sentence in the datasheet and it says that 8bit or 16bit DVP is supported.
If we have 10-bit or 12bit DVP sensor is this also supported ?
Can we set the DVP to 16bit but then in software use only 10bit?
What input image formats are supported ( YUV422 , RGB888) ?

Best Regards.

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ESP_krzychb
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Re: Documentation Requests/Feedback

Postby ESP_krzychb » Wed Jul 08, 2020 8:19 pm

Hi zero0d,
zero0d wrote:
Sun Jul 05, 2020 8:16 am
can you tell why is there no camera DVP interface documentation for ESP32-S2 ?
Documentation for the camera interface (part of I2S module) is being prepared now.
It should be published in one month.
zero0d wrote:
Sun Jul 05, 2020 8:16 am
Can you tell which pins can be used for D0 to D15, VSYNC, HREF, PCLK ?
"Any" pins can be used. Specific pins should be selected with GPIO Matrix.
Please see Chapter IO MUX and GPIO Matrix of ESP32-S2 Technical Reference Manual.
zero0d wrote:
Sun Jul 05, 2020 8:16 am
Also there is only one sentence in the datasheet and it says that 8bit or 16bit DVP is supported.
If we have 10-bit or 12bit DVP sensor is this also supported ?
Can we set the DVP to 16bit but then in software use only 10bit?
What input image formats are supported ( YUV422 , RGB888) ?
The camera module of ESP32-S2 chip supports up to 16 bits.
The actual number of bits and the data format will depend on the software driver implementation and may be limited by required image resolution, framer rate, memory available to store the image, etc.
Currently I see some basic driver for OV2640 and OV3660 sensors implemented in esp-dev-kits/esp32-s2-kaluga-1.

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