1c92945f59
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>
| Supported Targets | ESP32-P4 | ESP32-S2 | ESP32-S3 |
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TinyUSB Serial Device Example
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This example shows how to set up ESP chip to work as a USB Serial Device.
As a USB stack, a TinyUSB component is used.
How to use example
This example can also be configured to act as double serial device.
Run idf.py menuconfig and in Component config → TinyUSB Stack → Communication Device Class (CDC) → CDC Channel Count select number of serial devices you want to implement.
Hardware Required
Any ESP board that have USB-OTG supported.
Pin Assignment
Note: In case your board doesn't have micro-USB connector connected to USB-OTG peripheral, you may have to DIY a cable and connect D+ and D- to the pins listed below.
See common pin assignments for USB Device examples from upper level.
Build and Flash
Build the project and flash it to the 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 this output (for single CDC channel):
I (285) example: USB initialization
I (285) tusb_desc:
┌─────────────────────────────────┐
│ USB Device Descriptor Summary │
├───────────────────┬─────────────┤
│bDeviceClass │ 239 │
├───────────────────┼─────────────┤
│bDeviceSubClass │ 2 │
├───────────────────┼─────────────┤
│bDeviceProtocol │ 1 │
├───────────────────┼─────────────┤
│bMaxPacketSize0 │ 64 │
├───────────────────┼─────────────┤
│idVendor │ 0x303a │
├───────────────────┼─────────────┤
│idProduct │ 0x4001 │
├───────────────────┼─────────────┤
│bcdDevice │ 0x100 │
├───────────────────┼─────────────┤
│iManufacturer │ 0x1 │
├───────────────────┼─────────────┤
│iProduct │ 0x2 │
├───────────────────┼─────────────┤
│iSerialNumber │ 0x3 │
├───────────────────┼─────────────┤
│bNumConfigurations │ 0x1 │
└───────────────────┴─────────────┘
I (455) TinyUSB: TinyUSB Driver installed
I (465) example: USB initialization DONE
Connect to the serial port (e.g. on Linux, it should be /dev/ttyACM0) by any terminal application (e.g. picocom /dev/ttyACM0).
Now you can send data strings to the device, the device will echo back the same data string.
The monitor tool will also print the communication process:
I (12438) example: Data from channel 0:
I (12438) example: 0x3ffbfea0 45 73 70 72 65 73 73 69 66 0d |Espressif.|