Yes I know. In fact the device respond CMDERROR wich is more thant one byte The command was just a simple RXCMD followed by a bulk_read 1 byte len, but instead of giving a number between 0 and 255, The device send this string. this mean that my command rxcdm is not supported by the device ( This happens after some time... ) That's why I suspect and I think that the polling spped is not well supported by the device...
The sequence is normally: 1. sending RXCMD 2. receiving 1 byte that give the len of data in the device buffer If 2 = 0 back to step 1. 3. receiving data with len = value from step 2 4. back to step 1 My problem happens suddenly at step 2 after some time ... (This sequence is well supported during 10 to 60 seconds by fails after that...) So I repeat the question, may I slow down the polling ? Alain -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Alan Stern Envoyé : dimanche 22 juillet 2007 18:02 À : Alain Degreffe Cc : linux-usb-devel@lists.sourceforge.net Objet : Re: [linux-usb-devel] urb->status -EOVERFLOW On Sun, 22 Jul 2007, Alain Degreffe wrote: > Hi, > > After a big rewriting of iuu_phoenix, I have the following problem. > The polling is well working with callback mechanism but only during 30 > seconds maximum. > After sometime, The read_bulk_callback give me an urb-status EOVERFLOW... > Is the polling running to faster than the device can support ? Is there a > way to slow down the polling ? > The only way to recover is to reset the device ( usb_reset_device ) EOVERFLOW has nothing to do with the speed of polling. It means that the device is sending more data than urb->transfer_buffer_length. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
