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 -- 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
