非常感谢，附件是ADC规格书，你的想法非常有创意，我感觉理论上能行的通，CS其实和CNV是同一个pin，RMT通过一个IO来产生CS信号，然后这个IO要连接到ESP32配置的slave的cs pin上，也一起连到ADC的CNV（CS）上，是这么回事吧？


Well, something like this: RMT generates a CS and a CLK.
They connect to the ESP and ADC. Both devices operate in slave mode, with only one transmitting data and the ...

Unfortunately, I couldn't find the datasheet for your ADC.
Technically, both the ESP and ADC will become slave devices, while the RMT generates CS and SCLC and acts as the master.
The ESP only needs SCLC, while the ADC needs CS and SCLC (and possibly also CONV). Run SPI DMA, everyone waits for CS ...

hi
Try switching to slave DMA mode, create external SCL and СS, for example using RMT.
or, more correctly, DMA-Controlled Configurable Segmented Transfer

You can read the section
Chapter 15 Permission Control (PMS)
https://documentation.espressif.com/esp32-s3_technical_reference_manual_en.pdf
You can lock any block of registers and memory sections from being modified, and then block the ability to unlock these sections until the next processor ...

Hi
I don't see much difference in the processing of PCLK HSYNC VSYNC DE synchronization signals between a real camera and an LCD.
You'll have a different problem. According to the datasheet, PCLK is 80+- MHz. The 16-bit LCDCAM ESP32S3 module can receive a maximum frequency of 16 bits, 40 MHz (8 bits ...

I haven't measured the M2M speeds for the ESP32P4.
For the ESP32S3, you can see speed comparisons here.

viewtopic.php?t=36808

esp_async_memcpy - as far as I remember, it's GDMA.

Hi
GDMA is obviously slower than memcpy.
1. The data transfer goes through the APB bus, which is slower than direct RAM transfer.
2. High overhead when transferring GDMA m2m (descriptor allocation with alignment, cache synchronization).
However, up to 40 MB/sec on Spiram (RAM) M2M should work. (At ...

Now the S3 has no general purpose parallel interface, now my question would be can i repurpose the camera interface to read the ADC?


You can use this as a basic example:
https://esp32.com/viewtopic.php?t=33876
https://github.com/ok-home/logic_analyzer
This example allows you to capture 8 ...

If you're happy with translating the input GPIO to the output GPIO, there are special signals in the multiplexer for this.
For example, for the ESP32S3, this is...

There is a range of peripheral output signals (208 ~ 212 in Table 6.11-1) which are not connected to any peripheral, but
to the input ...

Why so complicated?

// synchronize sending of all channels
rmt_new_sync_manager(...)
....
while(1){
// prepare data
....

// transmit data
rmt_transmit(ch0...);
rmt_transmit(ch1...);
rmt_transmit(ch2...);
// wait for all channels to finish transmitting
rmt_tx_wait_all_done(ch0...);
rmt_tx_wait_all ...