Embest AM3517 Specifications download pdf (Page 59)

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4.6.2 Compilation

Save the configuration and execute the following command to recompile the

kernel:

make

make uImage

After the above steps are finished, the arch/arm/boot directory will contain

a new kernel image uImage; and drivers/usb/gadget directory will contain a

new module file g_file_storage.ko.

4.6.3 Test

Update the kernel image file ulmage on the SD card, copy the file

g_file_storage.ko to the SD card and reboot the system from the SD.

Execute the following commands to stimulate the SOC8200 into acting as a

USB mass storage device for PC’s visit:

root@DevKit8000:~# mount –t vfat /dev/mmcblk0p1 /mnt

root@DevKit8000:~# cd /mnt

root@DevKit8000:/mnt# insmod g_file_storage.ko file=/dev/mmcblk0p1 stall=0

removable=1

g_file_storage gadget: File-backed Storage Gadget, version: 7 August 2007

g_file_storage gadget: Number of LUNs=1

g_file_storage gadget-lun0: ro=0, file: /dev/mmcblk0p1

musb_hdrc musb_hdrc: MUSB HDRC host driver

musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 2

usb usb2: configuration #1 chosen from 1 choice

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Use the USB cable (USB mini B to USB A) to connect the development board

to the PC, the PC will notify you that a USB mass storage device has been

found.

Note:

 Please make sure that the kernel image has been updated, otherwise, the

module: g_file_storage.ko will fail to load and a message similar to the

following will be displayed: insmod: cannot insert

'/media/mmcblk0p1/g_file_storage.ko': Device or resource busy

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Embest AM3517 Specifications Page 59