The solution was found here https://stackoverflow.com/questions/65481757/qemu-read-guest-ram-from-host-application Using cpu_physical_memory_read you can read the guest's memory.

So, let's summarize SPI emulation using DMA channels:
1) The ESP firmware writes various registers, including SPI_DMA ...

It seems that I have found the answer to the first question. I assumed that this was an offset relative to something and started going through the starting addresses of the regions specified in the documentation.It looks like the address 0x3FF00000 is used as a base - this is the starting address in ...

OK, let's continue. I was able to connect the devices via the i2c bus and GPIO lines without any problems - they work as expected and without any issues.

Now when I tried to connect devices via SPI bus, I had problems with it. Data simply doesn't pass through SPI. The emulated device reads only ...

I did a little digging through the source code and concluded that my assumption about the gpio subsystem was correct—it's not implemented. The only thing it does implement is reading bootstrap. Obviously, this isn't enough for gpio to work in any form, so I tinkered with the code a bit. Here is a ...

(Please note that English is not my native language)

Hi all! I am developing my own device with esp32 chip as CPU. This device has various peripherals on different buses such as i2c and spi. Some of the peripherals also have GPIO connections for interrupts.

I want to make an emulator of my device ...

I ended up solving the problem. The point was that the wrong quartz was soldered on the vs1053 debug board. Because of this, the vs1053 played sound slower than necessary.

They also helped me on GitHub https://github.com/espressif/esp-idf/issues/5997

Thank you all for your attention.

Moderators ...

(Sorry for my english)

Hi!

I have esp32 and vs1053(audio codec). I trying create bluetooth audio player. I set up the esp32 as bluetooth sound source. vs1053 decodes audio and returns it over the i2s bus. vs1053 support i2s output format is 16bit per sample and 48/96/192KHz. I set it to output at ...