On 04/15/11 07:35, Marius Kotsbak wrote: > Den 15. april 2011 16:05, skrev Richard Ash: >> I have a custom board with an STM32 (arm-based) microcontroller with >> built-in USB peripheral, running a modified version of ST's USB Serial >> device code which makes it appear as a CDC-ACM class device. It's a >> Full Speed (12Mbit) device, not High Speed. As a result, the bulk >> in/out endpoints are limited in max packet size to 64 bytes, which >> shows up in the lsusb -v output as expected. > > I measured 14 Mbits using the CDC-ACM driver with my HSPA+ 3G modem, so > it is seems it is performing quite well, although it would possible > perform better using the CDC-NCM module (not tested yet). > > -- > Marius Kotsbak > Hi Marius, That is a very impressive rate considering you are on a 12Mhz bus! Usually a FS max transfer rate tops out around 1Mbyte per second. Is your data being sent compressed? Regards, Steve -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
