| Supported Targets | ESP32-P4 | ESP32-S2 | ESP32-S3 |
|---|
CherryUSB Serial Device Example
Starts a CDC Device, and sends back any received data from the host.
(See the README.md file in the upper level 'examples' directory for more information about examples.)
How to use example
This example can also be configured to act as double serial device.
Run idf.py menuconfig and in Example Configuration → Enable usb cdc acm two channel enable.
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
When running, the example will print the following output:
I (271) main_task: Started on CPU0
I (291) main_task: Calling app_main()
[I/USB] cherryusb, version: v1.4.3
[I/USB] ========== dwc2 udc params ==========
[I/USB] CID:00000000
[I/USB] GSNPSID:4f54400a
[I/USB] GHWCFG1:00000000
[I/USB] GHWCFG2:224dd930
[I/USB] GHWCFG3:00c804b5
[I/USB] GHWCFG4:d3f0a030
[I/USB] dwc2 fsphy type:1, hsphy type:0, dma support:2
[I/USB] dwc2 has 7 endpoints and dfifo depth(32-bit words) is 200, default config: 7 endpoints
[I/USB] =================================
[I/USB] fifo0 size:0010, offset:0050
[I/USB] fifo1 size:0010, offset:0060
[I/USB] fifo2 size:0010, offset:0070
[I/USB] fifo3 size:0010, offset:0080
[I/USB] fifo4 size:0010, offset:0090
[I/USB] fifo5 size:0010, offset:00a0
[I/USB] fifo6 size:0010, offset:00b0
I (391) device_cdc_main: usb cdc acm init done
I (721) device_cdc_main: intf:0, dtr:0
I (721) device_cdc_main: intf:0, rts:0
I (2981) device_cdc_main: intf:0, dtr:0
I (2981) device_cdc_main: intf:0, rts:0
I (2981) device_cdc_main: intf:0, dtr:0
I (2981) device_cdc_main: intf:0, rts:0
I (2981) device_cdc_main: intf:0, dtr:0
I (2981) device_cdc_main: intf:0, rts:0
I (2991) device_cdc_main: intf:0, dtr:0
I (2991) device_cdc_main: intf:0, rts:0
I (2991) device_cdc_main: intf:0, dtr:0
I (2991) device_cdc_main: intf:0, rts:0
I (3001) device_cdc_main: intf:0, dtr:0
I (3001) device_cdc_main: intf:0, rts:0
I (6011) device_cdc_main: actual out len:13
I (6021) device_cdc_main: actual in len:13
I (10411) device_cdc_main: actual out len:13
I (10421) device_cdc_main: actual in len:13
I (11111) device_cdc_main: intf:0, dtr:0
I (11111) device_cdc_main: intf:0, rts:0