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esp-idf/examples/peripherals/usb/host/cdc/cdc_acm_host
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Frantisek Hrbata 1c92945f59 change(examples): switch examples to use a minimal build 
Currently, several example dependencies rely on the fact that all
registered components are added to the build, along with components
specified in common requirements. This results in longer build times
because even unused components must be built. Switch all examples to use
idf_minimal_build to compile only the components actually required by
the example.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
2024-11-20 20:14:40 +01:00
..
main
change(usb/examples): Trim the USB example builds
2023-10-10 10:28:47 +02:00
CMakeLists.txt
change(examples): switch examples to use a minimal build
2024-11-20 20:14:40 +01:00
README.md
docs(usb_host): Update usb_host example READMEs for P4
2024-10-31 09:00:59 +01:00

README.md

Supported Targets ESP32-P4 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 development boards with USB-OTG support. One will act as USB host and the other as USB device.

Pin Assignment

Follow instruction in examples/usb/README.md for specific hardware setup.

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
...
Device descriptor is printed here
...
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!
...