Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


USB CDC demo linux

Posted by madis on October 22, 2007

I have question regarding SAM7X lwip demo. There is USB CDC driver included in that project. Which runs fine in case of windows host. But I can not get it working under linux. My linux box finds the usb device and seems to enumerate it fine:

usb 2-8.4: new full speed USB device using ehci_hcd and address 5
usb 2-8.4: configuration #1 chosen from 1 choice

But thats all it does. Linux version is:

debian stable

lsmod shows that cdc_acm module is loaded. I loaded it manually. It seems to be that CDC class device is not recognized?

Thank you,

RE: USB CDC demo linux

Posted by Richard on October 22, 2007
I'm afraid it has been noted before that the CDC driver is not fully conferment to the CDC spec, so I expect this is the issue on Linux. Windoze (on which it was developed) is somewhat more forgiving it seems. The driver is just meant for demo purposes. If you correct it for Linux then let me know and I can update the files. I do not have access to a Linux machine so cannot test it myself.


[ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS v10.2.0 is available for immediate download. MIT licensed, and including RISC-V and ARMv8-M (Cortex-M33) demos.

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


FreeRTOS and other embedded software careers at AWS.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Cadence Tensilica Cortes

Espressif ESP32

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers





STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS

Xilinx Microblaze and Zynq partner