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854127a57c
esp-idf/examples/peripherals/usb/host/cdc/cdc_acm_host
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Darian Leung 854127a57c usb: USB Host stack uses USB PHY driver 
This commit updates the USB Host stack to use the USB PHY driver. The
USB PHY and the OTG Controller should now both be setup/deleted using
usb_new_phy() and usb_del_phy() respectively.

- The hcd_install() now expects the USB PHY and OTG Contorller to be
    already setup before it is called
- usb_host_install() now has an option to skip calling usb_del_phy() if
    the user wants to setup their own USB PHY (e.g., in the case of using
    and external PHY).
- CDC-ACM and MSC examples/test updated to use internal PHY

Closes https://github.com/espressif/esp-idf/issues/8061
2022-01-06 15:09:39 +08:00
..
main usb: USB Host stack uses USB PHY driver 2022-01-06 15:09:39 +08:00
CMakeLists.txt usb: Add USB host CDC-ACM class driver 2021-12-09 10:28:46 +01:00
README.md usb: Add USB host CDC-ACM class driver 2021-12-09 10:28:46 +01:00

README.md

Supported Targets ESP32-S2 ESP32-S3

USB CDC-ACM Host Driver Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example shows how to use the CDC-ACM Host Driver to allow an ESP chip to communicate with a USB CDC-ACM device.

How to use example

Hardware Required

Two ESP boards that have USB-OTG supported. One will act as USB host and the other as USB device.
Connect USB_D+, USB_D-, GND and +5V signals of USB host to USB device.

Pin Assignment

See common pin assignments for USB Device examples from upper level.

Build and Flash

  1. Build and flash tusb_serial_device example to USB device board.
  2. Build this project and flash it to the USB host board, then run monitor tool to view serial output:
idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

After the flashing you should see the output at idf monitor:

I (256) USB-CDC: USB Host installed
I (256) USB-CDC: Opening CDC ACM device 0x303A:0x4001
CDC Header Descriptor:
        bcdCDC: 1.20
CDC Call Descriptor:
        bmCapabilities: 0x00
        bDataInterface: 1
CDC ACM Descriptor:
        bmCapabilities: 0x02
CDC Union Descriptor:
        bControlInterface: 0
        bSubordinateInterface[0]: 1
I (1666) USB-CDC: Data received
I (1666) USB-CDC: 0x3ffc4c20   41 54 0d                                          |AT.|
I (2666) USB-CDC: Data received
I (2666) USB-CDC: 0x3ffc4c20   41 54 2b 47 53 4e 0d                              |AT+GSN.|
I (3666) USB-CDC: Setting up line coding
I (3666) USB-CDC: Line Get: Rate: 115200, Stop bits: 0, Parity: 0, Databits: 8
I (3666) USB-CDC: Line Set: Rate: 9600, Stop bits: 1, Parity: 1, Databits: 7
I (3666) USB-CDC: Line Get: Rate: 9600, Stop bits: 1, Parity: 1, Databits: 7
I (3676) Example finished successfully!
...