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espressif / esp-idf

Espressif IoT Development Framework. Official development framework for Espressif SoCs.
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ESP32-S2 USB CDC not recognized from another device (IDFGH-6014) #7701

Closed albatros96 closed 3 years ago

albatros96 commented 3 years ago

Hello,

Development Kit: ESP32-S2-Saola Module or chip used: ESP32-S2-WROOM Build System: idf.py Compiler version: xtensa-esp32s2-elf-gcc Operating System: Windows 10 Using an IDE?: Yes (VS Code with ESP-IDF plugin) Power Supply: USB

My ESP32-S2 has an USB connector attached to pin 19 (D-), pin 20 (D+) and to the power supply. I use the TinyUSB drivers. I tested the USB connection through a terminal with the examples tusb_console, tusb_sample_descriptor, tusb_serial_device and they work.

I'm working in a project on MPLAB where there is a USB communication between the ESP32 and a PIC32MX250F256H. In particular, the ESP32 is configured as CDC USB device and must be plugged into the USB port of the PIC32 to start the communication. On the other hand the PIC32 should recognize it before communicate.

I'm encountering some problems due to the recognition of my ESP32-S2 as CDC device when I plug it into a USB port of the PIC32.

I think that the problem is due to the Class, Subclass and Protocol settings.

In fact I noticed when I plug the ESP's USB into my PC it's recognized as USB Serial Port with the values:

When I connect the ESP to the Microchip microcontroller, it detects the ESP with the following values:

After that the PIC32MX quits the communication because it doesn't recognize it in the right way. However I have another CDC device (it's not an ESP32) that works perfectly with this MCU, it has Class = 0x02, Subclass = 0x02, Protocol= 0x01.

Where could be the problem? Is there a way to change the CDC parameters (class, etc...) of my ESP32-S2?

Regards, Filippo

songruo commented 3 years ago

Hi Filippo, could you provide your USB CDC device configuration code for reproducing?

chegewara commented 3 years ago

This is not an issue, just the other MCU requirement about CDC protocol which is AT v.250. This issue can be closed and it is continued on forum.

Alvin1Zhang commented 3 years ago

Thanks for reporting, you could raise a post on our forum at https://esp32.com

albatros96 commented 3 years ago

Here the link to our discussion on the ESP32 Forum: https://esp32.com/viewtopic.php?f=12&t=23798