Difference between revisions of "USB Host"
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| Line 55: | Line 55: | ||
Test result (mean values): read -> 2980 kBytes/sec write -> 2095 kBytes/sec | Test result (mean values): read -> 2980 kBytes/sec write -> 2095 kBytes/sec | ||
| − | + | The maximal bandwidth has been also measured by using a scope and by tranferring 4096 octects from the usb stick to a buffer of a kernel driver | |
| + | Result: ~10Mo/sec | ||
== Links == | == Links == | ||
* http://www.nxp.com/acrobat_download/datasheets/ISP1761_4.pdf | * http://www.nxp.com/acrobat_download/datasheets/ISP1761_4.pdf | ||
Revision as of 11:24, 30 January 2008
How-To use the ISP176x USB Host controller of the APF9328DevFull
The DevFull is equipped with a USB 2.0 Host controller featuring three USB high speed ports.
Contents
USB HOST Controller
Driver installation
make linux-menuconfig
select Device Driver->USB support->support for Host-side USB (kernel)
select Device Driver->Armadeus Specific Drivers->ISP1761 USB 2.0 Host controller (module)
Starting the drivers
Three drivers have to be started in order to get the ISP working. They have to be started in the following order:
modprobe apf9328-isp1761 modprobe hal_imx modprobe pehci
USB devices
USB keyboard
driver installation
Adding USB keyboard support
make linux-menuconfig select Device Driver->HID Devices-> Generic HID support (kernel)
select Device Driver->HID Devices-> USB Human Interface Device (module)
Starting the driver
modprobe usbhid
USB Flash memory
driver installation
Adding USB Flash support
make linux-menuconfig select Device Driver-> SCSI device support->SCSI device support (kernel)
select Device Driver-> SCSI device support->legacy /proc/scsi/ support (kernel)
select Device Driver-> SCSI device support->SCSI disk support (kernel)
select Device Driver-> USB support ->USB device filesystem (kernel)
select Device Driver-> USB support ->USB Mass Storage support (kernel)
Starting the driver
if sda1 has not been previoulsy created
mknod /dev/sda1 b 8 1
create a mount directory "memstick"
mkdir -m 777 /mnt/memstick
mount the USB Flash device
mount -t vfat /dev/sda1 /mnt/memstick
check what is present on the USB Flash device
ls -al /mnt/memstick
USB Performances
A performance test has been performed by means of the usb_perf.sh script.
A high speed USB stick (corsair memory flash voyager) has been used.
Test result (mean values): read -> 2980 kBytes/sec write -> 2095 kBytes/sec
The maximal bandwidth has been also measured by using a scope and by tranferring 4096 octects from the usb stick to a buffer of a kernel driver
Result: ~10Mo/sec
