usb microscope linux

Let's continue with the previous section. Fill_inquiry_response (), which is from drivers/USB/storage/USB. C. 266 void fill_inquiry_response (struct us_data * us, unsigned char * data, 267 unsigned int data_len) 268 { 269 If (data_len 270 return; 271 272 if (data [0] 0x20) {/* USB device currently not connected. Return 273 peripheral qualifier 001b (".

Let's continue with the previous section. Fill_inquiry_response (), which is from drivers/usb/storage/usb. c. 266 void fill_inquiry_response (struct us_data * us, unsigned char * data, 267 unsigned int data_len) 268 { 269 if (data_len 270 return; 271 272 if (data [0] 0x20) {/* USB device currently not connected. Return 273 peripheral qualifier 001b ("..

that Genesys Logic's products had this problem, and later we found that more products had the same problem. Therefore, the flag US_FL_GO_SLOW is used. If you are interested in looking at the early Linux Kernel, you will find that there was actually no such flag. At that time, a USB_VENDOR_ID_GENESYS is defined, directly compare whether this product is from Genesys Logic. If yes, consider this latency. Otherwise, you will not need to use it.Line 3, tr

Come out and try again later. Basically, each directory in the Linux kernel has a Makefile. Makefile and Kconfig are just like a map of a city. a map shows us a city, while Makefile and Kconfig let us know what is under this directory... "Come out and try again sooner or later ." Basically, there is a Makefile under each directory in the Linux kernel. Makefile and Kconfig are like a map of a city. a map lea

drivers/usb/storage/protocol. h: 51/* struct scsi_cmnd transfer buffer accessutilities */ 52 enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF }; This parameter is actually a simple enumerated data type, and its meaning is also very simple: one indicates copying to the server load balancer> request_buffer, TO_XFER_BUF; the other indicates copying from the server load balancer> request_buffer, FROM_XFER_BUF. (Digression: XFER refers to TRANSFER, which

*/ 154 void * extra;/* any extradata */ 155 extra_data_destructor extra_destructor;/* extra data destructor */ 156 # ifdef config_pm 157 pm_hook suspend_resume_hook; 158 # endif 159 }; It is not difficult to find that every important data structure in the Linux kernel is complex. In short, this troublesome data structure is available to every device. In other words, we apply for a us_data for each device, because the edge in this structure wil

In 1991, one introduced the concept of pipelines in Linux and used pipelines in many places, such as file systems and device drivers. So we can see that there are various pipelines in Linux. But the same thing is that all pipelines are used to transmit things, but some pipelines transmit real material while some pipelines transmit data. The pipe we see in the USB

"Come out and try again sooner or later ." Basically, LinuxEach directory in the kernel has a makefile. MakefileAnd kconfigJust like a map of a city, a map leads us to know a city, while makefileAnd kconfigSo that we can understand the structure under this directory. Drivers/USB/storage/Makefile under the DirectoryThe content is as follows: Lfg1:/usr/src/linux-2.6.22/Drivers/

Objective: To study USB in depth and take notes here. Welcome to the discussion. [Linux 3.2] [Driver/USB/CORE/devio. C] Definition: usbfs_driver struct usb_driver usbfs_driver = {.name ="usbfs",.probe =driver_probe,.disconnect =driver_disconnect,.suspend =driver_suspend,.resume =driver_resume,}; [Linux 3.2] [INCLUDE/

/linux/usb. h: 69/* host-side wrapper for one interfacesetting's parsed descriptors */ 70 struct usb_host_interface { 71 struct usb_interface_descriptordesc; 72 73/* arrayof desc. bNumEndpoint endpoints associated with this 74 * interface setting. these will be in no participant order. 75 */ 76 struct usb_host_endpoint * endpoint; 77 78 char * string;/* iInterface string, if present */ 79 unsigne

USB device has a configuration, which we mentioned earlier, and there is another setting (setting ). A little strange, aren't these two words the same thing? Let's take our most familiar mobile phone for example. If you don't talk about the configuration, you just need to set it. Various configurations of a mobile phone may have been determined. For example, the vibration or ringtones are determined, and various functions are determined. However, the

From: http://hyt19860117.love.blog.163.com/blog/static/127773729201042435553852/ With the improvement of people's living standards, more and more USB devices are used, but Linux still does not fully Plug and Play in hardware configuration. how to configure and use Linux is alsoThis article is intended to help you understand how to develop a

This story uses kernel code 2.6.22. In the Linux kernel code directory, all the Code related to the device driver is under the drivers/directory. Using the ls command in this directory, you can see many subdirectories: Lfg1:/usr/src/linux-2.6.22/drivers # ls Kconfig acpi atm block char cpufreq dma fc4 hid ide Input leds md mfd mtd oprofile pci ps3 s390 serial spi Us