Hi Ajay and expert, Can you correct me if my understanding has something wrong? [Quote from usb 2.0 spec] For full-/low-speed interrupt endpoints, the value of this field may be from 1 to 255. [Quote from usb 2.0 spec] So, If a Low speed Interrupt IN endpoint, the endpoint->interval = 0x2. Now I want to request data from the endpoint, I set RXINTERVAL = 0x2, and start to request the data.(All the related register set as bellow) If my understanding is correctly, one NAKTIMEOUT interrupt will happen if the device responses NAK longer time than 2 frame, rigtht? But in my case did not, the host pending on the request for the data, and no TIMEOUT interrupt happen , can you tell me, where I am missed or where am I wrong? [Registers value ] RXCSR 0x20 RXFUNCADDR 0x4 RXHUBADDR 0x2 RXHUBPORT 0x4 RXMAXP 0x4 RXINTERVAL 0x2 [Registers value ] Thanks in advance, -- K T Jung -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
