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DMA Timeout Error - HP Support Community - 14736
https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/DMA-Timeout-Error/td-p/14736
I swapped out the 6' USB cable with a 3' USB cable (previously a 6' for another 6') and it now everything runs fine. Looks like these USB ports on this specific computer do not like the longer cables. I have 2 other computers using the same scanner model, one with Win7(64) Ultimate and the other with Win7(32) Pro but both are Dell PCs.
Petalinux DMA time out - support.xilinx.com
https://support.xilinx.com/s/question/0D52E00006hpJw4SAE/petalinux-dma-time-out?language=en_US
[ 95.761483] DMA timed out. This can be fixed by commenting out the line highlighted beow in the DMA client: /* Close the file and there's nothing to do for it */ ... Quickly install Cable Drivers for Xilinx Platform Cable USB II on Windows 10; Don't see what you're looking for? Ask a Question.
USB Audio Not Playing - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-audio-not-playing
Audio services not responding. Both the Windows Audio and the Windows Audio End Point Builder services must be running for audio to work correctly. Cause. This "audio not playing" problem occurs because the default USB audio 2.0 driver (usbaudio2.sys) uses the WaveRT port for operation but the device-specific driver does not.
Attacks via physical access to USB (DMA...?) - …
https://security.stackexchange.com/questions/118854/attacks-via-physical-access-to-usb-dma
While (most) USB protocols do not allow for DMA, and none allow for it by default, the USB controller is connected to the PCH over PCI, which has DMA abilities. The USB controller promises never to do evil, of course, and promises it will tell any mean USB devices to fsck off if they refuse to follow the protocol, but it is certainly possible for the controller to be hijacked by …
USB DMA Question | Microchip
https://www.microchip.com/forums/m1117619.aspx
For completeness and just in case someone sees something I forgot or missed i'll post the code to initialize the USB and USB DMA. Order of operation: 1) Initialize USB. 2) Initialize USB DMA (I made it a separate function for other instances where I may not need or use it). 3) Enable USB (USBCSR0bits.SOFTCONN = 1;)
AXI DMA with Zynq Running Linux
https://support.xilinx.com/s/question/0D52E00006iHkPH/axi-dma-with-zynq-running-linux?language=en_US
Starting DMA transfers; DMA timed out; DMA timed out; I am now trying to add char driver user access to the working axidmatest driver as described in the PDF, but it is not so easy. Does anyone get the Proxy DMA working using petalinux 2016.2 ? I know that Xilinx kernel changes from 2015.4 to 2016.2 so i hope this is not broken. Thanks for ...
Our Guide to USB Audio - Why Should I Use it? | …
https://www.cambridgeaudio.com/usa/en/blog/our-guide-usb-audio-why-should-i-use-it
One of the problems with USB audio transfer is that these clocks are not running at the same time. Digital music is sent as USB packets from the computer down the USB cable to the DAC. These are sent in periodic time frames according to the computers clock. There are three types of USB audio DAC. Synchronous USB DAC is the lowest quality of the three often used in low end …
Upgrading STM32Cube USB Audio Class driver – More advanced ...
https://turntablecontrol.wordpress.com/2014/12/27/upgrade-on-stm32cube-usb-audio-class-driver-more-advanced-playback/
In practice it means, that USB write my audio buffer faster than I2S DMA reads it and pushes it to the DAC. In the original implementation, this difference was compensated after each DMA write, so each 40ms with using 1 sample less or 1 sample more from audio buffer, depending on the difference.
USB Audio Simplified - Silicon Labs
https://www.silabs.com/documents/public/white-papers/usb-audio-simplified.pdf
a time. Any clock mismatch between host and device (however slight) will result in an overrun or underrun condition. The USB specification defines several methods for accommodating host/device clock mismatch. USB defines modes that govern the operation of sources and sinks according to Table 1. (For audio-out,
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