I have a newbie question :-) I would like to have to threads: 1 reading process and one writing process...
For the moment as soon I write to device, I begin to read the answer but it is not very efficient because the iso7816 don't give a real way to know if the write is finish or if the read will give an answer... In the usb-serial classical implementation, the bulk read return all incoming characters and the callback function permit to write those characters into the tty device. In my case, the problem is the next one: to read character I must send a command to the device with a bulk write.. In the read call back, may I use the port stored in the context to call a bul write function to ask to the device to read ? Second problem, the protocol of the device works like this: To read character, I must ( as I said before ) , send a command to read ( a bulk write message ) , after try to read one byte to know how much byte are waiting in the device buffer and finally bulk read the len given at the previous step... So ideally, a thread dedicated to this sequence is the solution to the latency observed in the current implementation ( the smart routine is not magic and the cases to stop waiting are limited ) because the function wait during 200 round to be sure to read all datas... Thanks for you propositions... Alain -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de [EMAIL PROTECTED] Envoyé : jeudi 19 juillet 2007 9:11 À : 'Oliver Neukum' Cc : linux-usb-devel@lists.sourceforge.net Objet : Re: [linux-usb-devel] [PATCH] iuu_phoenix new driver proposal 2 fixed OOps ;-) 2 missing characters... Now it compile without warning or error -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Oliver Neukum Envoyé : jeudi 19 juillet 2007 8:22 À : linux-usb-devel@lists.sourceforge.net Cc : Alain Degreffe Objet : Re: [linux-usb-devel] [PATCH] iuu_phoenix new driver proposal 2 Am Mittwoch 18 Juli 2007 schrieb Alain Degreffe: +static int iuu_tiocmget(struct usb_serial_port *port, struct file +*file) { + u8 *st; + int status ; + st = kmalloc(sizeof(u8), GFP_KERNEL); + if (!st) + return -ENOMEM ; + iuu_status(port, st); + + dbg("%s (%d) msg ", __FUNCTION__, port->number); + if (st[0] & IUU_FULLCARD_IN) { + dbg("%s card present ! value returned %i ", __FUNCTION__, + TIOCM_CD); + status = 0 ; + } else { + status TIOCM_CD; Could you make the code compileable and resubmit it? Regards Oliver ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ 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: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
