linux usb audio interface

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Linux Drive-To-Digest series: Tinyalsa (tinymix/tinycap/tinyplay/tinypcminfo) Audio subsystem "Turn"

This article was reproduced from: http://blog.csdn.net/radianceblau/article/details/64125411 Currently, the mainstream audio architecture in Linux is Alsa (Advanced Linux sound Architecture), ALSA provides alsa-driver in the kernel driver layer, alsa-lib in the application layer, The application only needs to invoke the API provided by Alsa-lib to comp

Linux ALSA Audio Driver Seven: Codec__linux in ASOC architecture

://blog.csdn.net/droidphone Original, reproduced please indicate the source, thank you./*****************************************************************************************************/ The most important data structures for codec in 2. asoc Describe codec are: SND_SOC_CODEC,SND_SOC_CODEC_DRIVER,SND_SOC_ Dai,snd_soc_dai_driver, where the Snd_soc_dai and Snd_soc_dai_driver are also used in ASOC platform drive, platform and codec's Dai through Snd_soc_dai _link structure that binds the con

How to mount a USB flash disk in Linux

drive device in the/dev/directory. However, this device cannot be used before it is mounted, mounting is to use (that is, to open) the USB flash drive device. Where to mount it means that we can open it like opening a file. Of course, it is still different from general files, "property" is "device "! This is the function of mounting the USB flash drive. We can use the fdisk

USB device detection in Linux

If the USB device in Linux works properly, you must insert a USB bridge module into the system. At the beginning of the check, it is generally necessary to check whether the/proc/bus/usb directory exists. if not, try to insert the USB bridge module. There are two types of

Linux under the USB drive call flow __linux

_device_match () is_usb_device (Dev)//dev represents the entire USB device usb_match_id () usb_math_dynamic_id ()//dev represents the USB device interface Really_ Probe ()//further matching USB devices two branches: device-level, interface-level. The rest of the usb_device_

FAT32 USB flash drives mounted in Linux

Steps 1: Insert the USB flash disk into the USB interface and check whether it is inserted. 2: run the fdisk command to check the partition and USB device information. [root @ wgods ~] # Fdisk-lDisk/dev/sda: 1000.2 GB, 1000204886016bytes255hea... steps 1: Insert the USB flas

Arm-linux Learning Notes-(virtual machine Linux serial terminal and USB program download, based on TQ2440)

equipment installed after the device opened, we know that the device on Linux is the corresponding files, serial device corresponding files here/dev/ttyusb0Next is the serial communication, we install two serial communication software, a command line a graphical, use the commandsudo apt-get install minicom//command line debugging assistantsudo apt-get install cutecom//graphical debugging assistantAfter installing the minicom, you need to set the comm

General process of USB device detection in LINUX

Article Title: general process of USB device detection in LINUX. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. USB device detection is

Experience of porting and compiling ALSA audio architecture alsa-lib Embedded Linux

*************************************************************************************************************** ************Easywave Time: 2014.10.25Category: Linux application-alsa audio architecture Alsa-lib porting to compilation declaration: reprint, please keep the linkNote: If there is an error, please correct me. These are the journal articles I studied ...********************************************

Audio-visual image processing software for Linux platforms--(choice of Windows platform to Linux)

You may be bored with the bundle of win software,You may resist the win system in some way,You might just want to try a new system,......For whatever reason, now you're on Linux.Under Linux There are many graphics and image software not lost in the win platform, the key is excellent and free. (no more worrying about infringement.)One, image processing GIMP VS photosshopGIMP is known as the PS under Linux, y

Driver Implementation of USB devices in Embedded linux

Gadget subsystem. The device driver layer of the Linux Gadget subsystem is used to implement drivers for various devices according to various specifications and protocols. In this design, an embedded device must have the mobile hard disk function, this function can be implemented based on the specifications and protocols of the massive storage class. 1.1 Basic architecture of UDC driver Figure 2 shows the basic architecture of the UDC driver. In the

LINUX operating system on USB flash disk

The LINUX operating system on the USB flash disk-general Linux technology-Linux programming and kernel information. The following is a detailed description. Summary This article describes how to create a Linux boot system on a USB

How Linux mounts a USB flash drive

it's FAT32, Mount-t Vfat/dev/sdb1/mnt/usb In the case of the ext2 format, use the command: Mount-t Ext2/dev/sda1/mnt/usb 4, open/mnt/usb can see your u disk in the thing! Cd/mnt/usb Specific commands:

Detailed description of USB gadget devices in Linux

function (for example, a u disk or a usb Nic ). Composite devices support multiple functions. The realization of composite devices will be carefully studied later. Devices such as smartphones and PDAs support a wide range of endpoints and DMA buffers, providing the software with a foundation to support the combination of functions. There are two points worth noting. The first is that the usb gaget driver f

Install Linux on a USB flash drive

.... Click "master boot record ". On the displayed page, configure the master boot mode as UltraISOUSB-ZIP +. After the settings are complete, turn off the interface and return to the "Partition guide record" on the main interface ". Www.2cto.com: Check whether the partition boot record is syslinux. if not, configure it as syslinux. Generally, this step is okay. For the sake of insurance, it is better to s

USB device detection in Linux

If the USB device in Linux works properly, you must insert a USB Bridge module into the system. At the beginning of the check, it is generally necessary to check whether the/proc/bus/usb directory exists. If not, try to insert the USB Bridge module. There are two types of

Use a USB flash drive to load the controller driver to install Linux

changed.   In linux, the data in the data can still be read. However, when fdisk-l/dev/sdb is used, the Partition table of the USB flash disk is faulty, you can use fdisk/dev/sdb to enter the interactive interface and use the "w" command to rewrite the USB flash disk to a USB

For Linux, I am a USB flash drive (8) bus, device, and driver (on)

driver should register on the bus, or be listed. in the USB system, each driver of a USB device has a struct usb_driver structure. The Code is as follows: Include/Linux/USB. h 485 /*--------------------------------------------------------------------------*/486487 /**488 * struct usb_driver-identifies

Linux audio alsa Mechanism learning notes < a >

First macro view of the kernel exposed to the upper interface:[Email protected]:/# cat/dev/snd/ControlC0 pcmc0d10p pcmc0d13c pcmc0d15c pcmc0d2c pcmc0d3c pcmc0d5p pcmc0d8cpcmc0d0c pcmc0d11p pcmc0d13p pcmc0d15p pcmc0d2p pcmc0d3p pcmc0d6c pcmc0d9cpcmc0d0p pcmc0d12c pcmc0d14c pcmc0d1c pcmc0d31c pcmc0d4p pcmc0d6p pcmc0d9ppcmc0d10c pcmc0d12p pcmc0d14p pcmc0d1p pcmc0d32p pcmc0d5c pcmc0d7p TimerMainly by control and many PCM devices, wherein the control

Linux DSP plays audio file

) { intFD; intwavfd;/*a descriptor for a WAV file*/ intArg/*IOCTL Arg*/ intRet/*return value*/unsignedCharBuff[rate * bits * channels/8];//The buff has exactly one second of audio in it. /*Open Device*/FD= Open ("/DEV/DSP", o_wronly); if(FD 0) {printf ("Open OF/DEV/DSP failed"); Exit (1); } wavfd=open (filename, o_rdonly); if(Wavfd 0) {printf ("Open of WAV failed"); Close (FD); Exit (1); } /*Set Bits*/Arg=bits; RET= IOCTL (FD, So

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