Return-Path: Reply-To: From: "Halam Rose" Cc: Subject: RE: [Bluez-devel] CF cards capable of 1Mbps? Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" In-Reply-To: <1063111685.32473.425.camel@hades.cambridge.redhat.com> Sender: bluez-devel-admin@lists.sourceforge.net Errors-To: bluez-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Date: Tue, 9 Sep 2003 14:47:52 +0100 1 Mbps is the bulk data rate but there are overheads so only 723Kbps is possible with any Bluetooth link. Halam -----Original Message----- From: David Woodhouse [mailto:dwmw2@infradead.org] Sent: 09 September 2003 13:48 To: Nils Faerber Cc: bluez-devel@lists.sourceforge.net Subject: Re: [Bluez-devel] CF cards capable of 1Mbps? On Tue, 2003-09-09 at 14:20 +0200, Nils Faerber wrote: > The fact that the UART of the CF card sais it would run at 115kbps does > not at all mean that the actual data throughput is only 115kbps. > For example we have a Brainboxes CF card which you set to 115kbps but > actually uses 1Mbps between the UART and the CSR chipset then. The UART > clock is simply higher so that a devider for 115kbps results in 1Mbps. > Only if your OS tries to setup something based on the baudrate you would > be in trouble here. Linux has no problems with the extra bitrate. This is true. Which is why I confirmed with BNEP bandwidth tests that I only get about 9-10Kbps transfer rate, and checked what speed the CSR chip thinks it's talking at too... # pskey -d /dev/tts/0 -b Physical device :/dev/tts/0 Speed :115200 Use BCSP :YES Initiating read thread BT SYS: Initializing BCSP BT SYS: BCSP initialized and syncronized Synchronized Successfully read firmware info. Firmware version: 272 pskey>191 Key 0191 length 10 01d8 0006 00fa 0014 0004 0000 0004 001e 0064 000a The information about the Brainboxes card is appreciated -- thanks. http://www.brainboxes.com/products/bluetooth/product.asp?id=BL-565 says only 721Kbps, but that'll do me fine; I'll see if I can find one of those for slightly less than the insane amount of money they seem to claim is the recommended price. I had a Cyberblue BLUE-CF01 which had a baud_base of 1152000, but the first one went back due to radio-side reliability problems -- only about 1 in 5 times would it detect and correctly get name from my phone which was sitting right next to it. The second one was better for a while, but then started to lose RX characters, until last week it finally gave up completely and I don't receive _anything_ from the CSR chip. I don't think I want another of those :) -- dwmw2 ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel