From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [Bluez-users] Embedded bluetooth recommendations From: Marcel Holtmann To: Wiebe Baron Cc: BlueZ Mailing List In-Reply-To: <006201c4ba6b$d39682e0$a900a8c0@wivd10> References: <006201c4ba6b$d39682e0$a900a8c0@wivd10> Content-Type: text/plain Message-Id: <1098693859.24932.18.camel@pegasus> Mime-Version: 1.0 Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 25 Oct 2004 10:44:19 +0200 Hi Wiebe, > I have a question about embedded Bluetooth. I'm working on a feedback > control project which involves 8 devices. Up till now a module has > been used with integrated stack but this is unable to support an > RFCOMM link with seven slaves and the response time of a scatternet is > unacceptable so I'm now looking for a multiprocessor solution with a > separate stack. are you talking about seven RFCOMM links on the same ACL link or about seven different ACL links. If you really wanna work with piconet where the master controls 7 slaves you should use a CSR chip, because all other Bluetooth chips are acting somekind weird. However even with the CSR stuff you must make sure that at least a HCI 18.2 firmware is used. > I'm currently experimenting with a sharp LH79520 with embedded Linux > from metrowerks and Bluez but this seems to be overkill because the > application requirements themselves are minimal (7 way cable > replacement). The Sharp uses an ARM7TDMI. Actually this is really overkill and then you should better buy a Bluetooth chip that itself uses this ARM chip like Zeevo etc. However then the above point comes in ... > Does anyone have a suggestion of a combination of stack, operating > system and microprocessor that is known to work together and has > minimum requirements in terms of RAM, ROM and processor speed (cost)? I am not a microprocessor expert, but actually every processor with Linux support should be useable and BlueZ is of course the best choice for a Bluetooth stack. Regards Marcel ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users