All Questions
31
questions
0
votes
0
answers
116
views
Linux USB gadget configured through configfs
I have successfully configured USB On-The-Go (OTG) on an STM32 MPU (Linux) to support both Abstract Control Model (ACM) and Human Interface Device (HID) protocols. I utilized the ...
- 1
0
votes
1
answer
322
views
Stream MP4 file over usb
I have an embedded system running a custom distro built using Yocto. Later down the line, I will have a usb camera plugged into the system, but for not I would like to use a .mp4 file as a "dummy&...
- 103
1
vote
2
answers
748
views
Find out number of available USB endpoints
I am running Linux on an embedded system. The SoC of the system has a USB 2.0 port, and the datasheet claims that there are 8 endpoints available.
Is there any way I can verify this in software? ...
- 11
0
votes
0
answers
27
views
RB5 linux system cannot use ssh to connect V2X with the serial port
I have a V2X module, and I cannot it to linux/window PC with USB. Then using the command ssh [email protected], and entrance the v2x module.root@autotalks:~#
However, when i used the RB5, the ssh root@...
- 1
0
votes
1
answer
373
views
USB device shows nothing in dmesg when connected, disables port
I have an embedded linux USB host which refuses to detect a number of my USB devices. The host is running Ubutun 20.04LTS
Nothing shows up in dmesg during a failed detection and afterward the USB port ...
- 193
1
vote
1
answer
1k
views
How to get more details on irq process in top?
I have irq/21-xhci-hcd displayed as the process consuming 90% CPU on top. There was also a lot of CPU time spent on servicing software interrupts (si).
This is on embedded Linux.
Does this mean that ...
- 185
1
vote
1
answer
278
views
Shell/tty Access via USB or Bluetooth?
Overview
I am in the process of reverse engineering the software on my Infiniti Q50 head unit, and I am trying to figure out the best way to get shell access. I have pulled the image off of the ...
- 113
0
votes
0
answers
513
views
Why isn't the USB device being enumerated correctly after reset?
I have an embedded Linux device connected to a Sierra Wireless WP7610. The WP7610 has three USB serial ports which are enumerated as 0, 1 and 2. This is fine until the WP7610 resets, for instance by ...
- 289
2
votes
1
answer
1k
views
Unable to set USB gadget device class and protocol
I'm unable to successfully set the bDeviceClass, bDeviceProtocol, or bDeviceSubClass when configuring a device as an RNDIS gadget in /sys/kernel/config/usb_gadget/g1.
I'm configuring the gadget with ...
0
votes
1
answer
218
views
PocketBeagle enable com port on usb0
I'm attempting to configure a pocketbeagle running bone-debian9.9. Kernel version is 4.14.108-ti-r113. The board has a Micro USB port with the following functions: rndis, acm, ecm, and mass_storage. ...
- 148
1
vote
0
answers
292
views
udev and kernel show no events from usb devices
I run embedded linux on a zedboard-like platform. I need to create udev rules for some various devices that will be plugged into it.
I have gadgetfs and configfs on in the kernel and I've built them ...
- 11
1
vote
0
answers
460
views
Embedded linux - USB framebuffer device mounting
I have a embedded system which consists of a usb framebuffer display, and a customized embedded linux (3.10.59) box running Busybox (1.21.1).
There is software running a application which utilizes ...
- 155
3
votes
0
answers
129
views
Required kernel modules / configuration for OTG host on OMAP3 based device
I'm trying to figure out what kernel modules that I need to load in order correctly configure an TI OMAP3 based device (DM3730) as a USB host via the on-chip OTG controller.
Without loading any ...
- 141
5
votes
1
answer
14k
views
Configure Linux system as an OTG device
I'm wondering if it's possible to make a Linux system appear like an USB peripheral.
Like smartphones which can switch from master to slave depending on the device they are connected to, I would like ...
- 1,168
3
votes
1
answer
969
views
CDC-ACM driver returning garbage data
I'm trying to connect a u-Blox USB GPS device to an embedded (armel) Linux 2.6.32 system based on BusyBox. The device has a native CDC ACM USB interface. The system didn't come with cdc_acm, so I ...
- 153