Re: [Ftdi-usb-sio-devel] FT245BM transfer rates

[Karl R. <ka...@ho...>]

>Perhaps another of the usb serial drivers has implemented a multiple buffer 
>scheme to improve performance but I haven't looked at them in AGES so don't 
>know.

OK, I digged a bit in linux/drivers/usb/serial/ and found:
visor.c:
* (07/23/2000) gkh
*      Added pool of write urbs to speed up transfers to the visor.
[...]
#define NUM_URBS                        24
#define URB_TRANSFER_BUFFER_SIZE        768
static struct urb       *write_urb_pool[NUM_URBS];
static spinlock_t       write_urb_pool_lock;

Is this the multiple buffer scheme you wrote about?
Or am I totaly on the wrong track here?

Karl




















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