Okay, thank you for looking into it. I choose the S2 mini 2 because I just needed PCNT and USB support. I'll see if I can do without the console and if not I will open an issue.

I was aware of this delay and it's not so much about the boot messages per se. It's more about printf, ESP_ERROR_CHECK, ESP_LOGI, etc. So everything that would go to the console/stdout.

I found this issue: https://github.com/espressif/arduino-esp32/issues/8080

But that didn't work. I do have USB ...

I'm using the S2-mini-2 connected via USB. In Arduino IDE 2.3.2 I set USB CDC On Boot to enabled. Serial.print works fine this way but I do not get any console messages (boot messages). I assume the ROM is still trying to use the UART. How can I tell it to use the CDC port?

Thnx

Will there ever be any documentation on how to handle ADC continuous (DMA) read mode for the S2? I know that I could get some hints from the driver test code in esp-idf at components/driver/test/adc_dma_test. And I even found some guess work from someone. But how about some documentation?

Same for ...

and then in callback just repeat STALLed command.
Another thing i would try is to add small delay before sending STALLed commands (1-5 ms).



I did exactly that and upped the delay up to 50 ms but no change:


void usbh_ctrl_pipe_stalled_cb(usb_ctrl_req_t* ctrl)
{
ESP_LOG_BUFFER_HEX_LEVEL ...

Much appreciated. I will dig into it (will take some time) and report what I find.

1. You can try to re-send the same request when it STALL
2. can you use "usbview" on linux to see USB device configuration, i am wondering how it looks like



1. I was thinking about using a flag to signal when the device init is done and when encountering a stall while not done repeat by ...

You can also try my library, which is a bit friendlier to use IMO:

https://github.com/chipweinberger/xesp-usbh

I will have a look thank you

I think i dont understand, what is the difference between good and bad configuration (from hardware point of view)?



My final goal is to talk to a network switch that has a USB CDC port. When I connect this switch to a PC I get a cdc_acm port. When I try to use the USB host code with an ESP32S2 ...

The Logic Analyzer worked. This is what I see:

Connected to another ESP32S2 module, the host code works as expected:

SETUP ADDR 0 EP 0
DATA0 [ 80 06 00 01 00 00 12 00 ]
ACK
IN ADDR 0 EP 0
NAK
... more attempts with NAK
IN ADDR 0 EP 0
DATA1 [ 12 01 00 02 EF 02 01 40 3A 30 01 40 00 01 01 02 03 01 ...