hid or mass storage or others. if i use hid class ,i should't to write the driver on my windows xp os or not? is there any speed limit of the hid sub class? I use a STR710 EVAL board. thanks! cgha
The HID class has a speed limit of about 32KB/sec.
Thanks for your reply。 Yes，the HID has it's speed limitation，but I don't wan't to write a windows driver which is too difficult for me。I'v also checked the cdc class and found nothing,it is dedicated to serial 232 and NIC though the bulk transfer can be used. Since it is just a hobby project,the speed is not the main thing taken into account. Regards
cgha
Maybe this could be interesting for you:
http://www.ftdichip.com/
They provide RS232 to USB coverter ICs and also parallel to USB. The drivers are ready to use and for free.