Linux-2.6.32 porting and configuring USB peripherals on mini2440 development board

Editor: Because the LINUX kernel already supports the host driver of S3C2440 and supports a wide range of peripherals, this part can be used just by configuring. Because there are many things to configure, no detailed screenshots are given. It is very clear to read the manual. If you need the manual, please leave your email address to request it. 1 Configure and test the USB keyboard, scanner and mouse In the terminal of the kernel source code directory, enter: make menuconfig, and select the following submenu items in sequence: Device Drivers ---> [*] HID Devices ---> Press the space bar to select "USB Human Interface Device (full HID) support", so that the USB keyboard and mouse items are configured. Tip: The kernel source code directory corresponding to the configuration options here is: linux-2.6.32.2/drivers/hid/usbhid, where the principles of the USB keyboard and barcode scanner are the same, so their codes are the same. 2 Test USB keyboard, scanner and mouse Execute make zImage in the root directory of kernel source code to burn the generated new kernel into the development board. We still use the file system root_qtopia provided by Friendly Arm for testing, because it can support USB keyboard, mouse and touch screen at the same time, and supports hot plugging, so it is very convenient to use. In the previous steps, we have entered the qtopia graphics system by clicking on the touch screen, so here we can just find a USB HUB, connect a USB mouse and keyboard, or even a USB barcode scanner. Use the mouse to find an application, such as the "Notes" that comes with qtopia, click to open it, then you can use the keyboard to input various English characters, and you can also use the USB barcode scanner to directly scan the barcode for input. 3 Configure the USB flash drive Because the USB flash drive uses SCSI commands, we first add SCSI support. In the Device Drivers menu, select SCSI devicesupport, press Enter to enter the menu that appears, press the spacebar to select option--SCSI device support, then enter and select SCSI disk support, return to the Device Drivers menu, select USB support, press Enter to enter the USB support menu, find and select "<*> USB Mass Storage support". In addition, most of the current USB flash drives and other mobile storage devices use FAT/FAT32 format, so we also need to add support for the FAT32 file system. In the kernel configuration main menu, select the following menu items in sequence: File systems ---> DOS/FAT/NT Filesystems ---> Enter the FAT32 file system configuration submenu and select: MSDOS fs support In addition, in order to support Chinese and English encodings, select "-*- Native languagesupport --->" under the "File systems" menu and enter. Here, we need to select support for the following encodings: <*> Codepage 437 (United States, Canada) <*> NLS ISO 8859-1 (Latin 1; Western European Languages) <*> NLS UTF-8 Exit and save the above configuration. 4 Test USB drive Follow the above steps, execute: make zImage in the kernel source code root directory, burn the generated new kernel into the development board, do not insert the USB drive yet (do this to see the printed information when inserting), wait for the system to start, enter the command line console, at this time, you can see the USB drive information: At this time, the USB drive has been automatically mounted to the /udisk directory of the development board. At the same time, in the Qtopia system, you can see an icon on the taskbar, and all the files in the USB drive will be displayed in the "Documents" group, but it does not display the directory name. If you have too many files, then the list is also quite impressive. Note: Supporting automatic mounting of USB drives in Qtopia is implemented through a Qtopia 2.2.0 plug-in developed by Friendly Arm. At present, it only recognizes the first partition of MMC/SD card or USB drive, and the format is the common VFAT/FAT32/FAT16. If your USB drive or SD card cannot be recognized, please check whether it is in VFAT/FAT32/FAT16 format. 5 Configuring and testing USB cameras The Linux kernel version is frequently updated, and one of the main reasons is that more driver support is added. Directory Linux-2.6.32. 2 Almost all USB camera drivers are supported, but the interfaces provided by each manufacturer's USB camera driver to the upper layer are different. Therefore, even if the kernel supports so many cameras, ordinary USB camera applications cannot recognize them. The following are the steps to configure USB cameras in the kernel: In the Device Drivers menu, select Multimedia devices, press Enter to enter, select the "*" option, and select Video capture adapters to enter A menu will appear, find the V4L USB device option and enter the menu as shown in the figure, select the "*" option as shown in the figure, and then select GSPCA based webcams to enter. GSPCA is a universal USB camera driver developed by a French programmer in his spare time. You can choose to support all types of USB cameras here. --- GSPCA based webcams <*> ALi USB m5602 Camera Driver <*> STV06XX USB Camera Driver <*> GL860 USB Camera Driver <*> Conexant Camera Driver <*> Etoms USB Camera Driver <*> Fujifilm FinePix USB V4L2 driver <*> Jeilin JPEG USB V4L2 driver <*> Mars USB Camera Driver <*> Mars-Semi MR97310A USB Camera Driver <*> OV519 USB Camera Driver












































<*> OV534 USB Camera Driver
<*> Pixart PAC207 USB Camera Driver
<*> Pixart PAC7311 USB Camera Driver
<*> SN9C20X USB Camera Driver
<*> SONIX Bayer USB Camera Driver
<*> SONIX JPEG USB Camera Driver
<*> SPCA500 USB Camera Driver
<*> SPCA501 USB Camera Driver <*> SPCA505 USB Camera Driver <* > SPCA506 USB Camera Driver < *> SPCA508 USB Camera Driver <*> SPCA561 USB Camera Driver <*> SQ Technologies SQ905 based USB Camera Driver <* > SQ Technologies SQ905C based USB Camera Driver <*> Syntek DV4000 (STK014) USB Camera Driver <*> SUNPLUS USB Camera Driver <*> T613 (JPEG Compliance) USB Camera Driver <*> TV8532 USB Camera Driver <*> VC032X USB Camera Driver <*> ZC3XX USB Camera Driver In this way, we have configured the universal USB camera driver. If there is a new kernel version, there may be many more options. 6 Test the USB camera Continue with the above steps and execute make zImage in the kernel source code directory. Burn the generated kernel into the development board, and still use the file system root_qtopia that comes with Friendly Arm, because it already has a USB camera dynamic preview and photo taking program. Plug the camera into the USB Host port of the development board, and then In the "Friendly Arm" program group, click to open the "USB Camera" program, you will see a dynamic preview interface, adjust the focus of the camera, take a good pose, and click the "Snap" button to take a photo. The photo will be saved in the "Documents" group. The program can also adjust the brightness, contrast and gamma value; each camera model has been set to the best value or default value at the factory, which will be read when the program is opened. They are set accordingly.