Return-Path: Subject: Re: [Bluez-users] Has anyone seen these problems with the CSR BlueCore and BlueZ before ? From: Marcel Holtmann To: BlueZ Mailing List In-Reply-To: References: Content-Type: text/plain Message-Id: <1111068128.11792.73.camel@pegasus> Mime-Version: 1.0 Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Thu, 17 Mar 2005 15:02:08 +0100 Hi Han, > I'm developping an application on an ARM-7 based platform which is > running Linux 2.4.18 with the latest BlueZ version for that platform. > In this application there is a master device that can connect to up to > 7 slaves (master and slave devices are all the same, the external > controller determines which is master). > > The application does the following, the external controller on the > master can send a single command to the Linux application, in the > command is an address field identifying to which slaves the command > must be passed on. A slave will pass the command on to its external > controller, which will respond to the command by sending a reply back > to the Linux slave, which in turn passes it on to the Linux master and > is then handed over to the external controller again. As soon as all > addressed slaves have responded, the sequence is repeated. > > Now to what I see happening, when I run this with 5 slaves, I don't > see any problems for more than an hour, but when I run it with 6 or 7 > slaves, I see that the BlueCore resets itself, with 6 slaves after > about 40 minutes and with 7 slaves already after 5 to 10 minutes. When > I eliminate the CRC check I can run the 7 slaves configuration for up > to about 40 minutes after it crashes. > > What I think happens is that the BlueCore receives data to fast over > the air and can not pass it on to the Linux CPU quick enough, so there > is an internal overflow in the BlueCore. > Communication between the BlueCore and the Linux CPU is done via BCSP > at a speed of 921600 baud. > > Has anybody seen behaviour like this before and is there something I > can do about it ??? what does "hciconfig -a" tells you about the chip? Regards Marcel ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users