On Wed, May 30, 2012 at 8:23 AM, MC Potgieter <bluscape@xxxxxxxxx> wrote: > On Tue, May 29, 2012 at 10:24 PM, MC Potgieter <bluscape@xxxxxxxxx> wrote: >> I'm running linux kernel 2.6.38 on an embedded platform (Mini2440). On >> the platform I have a Silabs CP2102 USB to serial bridge IC and a USB >> host interface. I enumerate the USB host interface as a serial gadget. >> >> 1.) I have a problem reading data from the CP2102 UART on the platform >> but I can always write to it. The read will work for a few seconds and >> then stop working. >> >> 2.) On the serial gadget I can always read but write will work for a >> short while and the stop working. >> >> I connect my platform to a test PC via a serial cable, coming from the >> CP2102 on the platform, and a USB cable, coming from the host >> interface on the platform. >> >> The serial gadget enumerates on the test PC as a com port and I can >> communicate over it for a while. But if the interface is idle for a >> while I can only write to it with no response from the platform. >> >> For the CP2102 I can always receive data on the test PC but writing to >> the platform has no effect. >> >> What could this be and how can I resolve it. > > So it seems like the one direction on both interfaces stops working > after being idle for a while. I'm not a linux expert. Is there some way I can debug these interfaces to try and determine what is going on? -- 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
