tinyusb_cdc_rx_callback receive nothing on TUSB_SERIAL_DEVICE (ESP32-P4)

andromeda92
Posts: 34
Joined: Tue Nov 18, 2025 5:24 pm

tinyusb_cdc_rx_callback receive nothing on TUSB_SERIAL_DEVICE (ESP32-P4)

Postby andromeda92 » Thu Nov 20, 2025 11:39 pm

Hi,
on example, TUSB_SERIAL_DEVICE,
tinyusb_cdc_rx_callback receive nothing,

USB UART is connected to dedicaced USB-OTG from board Waveshare

https://imgur.com/a/9fZ1jhS
on the image above no descriptor, using default it's because is registered on menu config, it's normal

for example cdc_acm_vcp it work fine.

sdkconfig:
#define CONFIG_TINYUSB_DESC_CUSTOM_VID 0x0403
#define CONFIG_TINYUSB_DESC_CUSTOM_PID 0x6001
#define CONFIG_TINYUSB_DESC_BCD_DEVICE 0x0409
#define CONFIG_TINYUSB_DESC_MANUFACTURER_STRING "Espressif Systems"
#define CONFIG_TINYUSB_DESC_PRODUCT_STRING "Espressif Device"
#define CONFIG_TINYUSB_DESC_SERIAL_STRING "123456"
#define CONFIG_TINYUSB_DESC_CDC_STRING "Espressif CDC Device"
#define CONFIG_TINYUSB_CDC_ENABLED 1
#define CONFIG_TINYUSB_CDC_COUNT 1
#define CONFIG_TINYUSB_CDC_RX_BUFSIZE 512
#define CONFIG_TINYUSB_CDC_TX_BUFSIZE 512
#define CONFIG_TINYUSB_CDC_EP_BUFSIZE 512
ESP-IDF 5.5.1
Windows 10
Waveshare ESP32-P4 Wifi6 DevKit board

Thanks for your help.

andromeda92
Posts: 34
Joined: Tue Nov 18, 2025 5:24 pm

Re: tinyusb_cdc_rx_callback receive nothing on TUSB_SERIAL_DEVICE (ESP32-P4)

Postby andromeda92 » Sun Nov 23, 2025 12:01 am

any idea ?

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