From mboxrd@z Thu Jan 1 00:00:00 1970 From: T-Online Subject: Re: ALSA Driver for ARM Date: Tue, 29 Mar 2005 23:31:08 +0200 Message-ID: <4249C91C.9000000@t-online.de> References: <42480A24.5070602@fetron.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <42480A24.5070602@fetron.de> Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Hi, I have a new hint, but the problem is not solved. > I want to programm an driver for the Cirrus CS42516 and the ARM9 CPU > EP93xx also from Cirrus. > > I think, there are several errors: > > - when I start aplay, I receive a buffer. A dump to this memory region > show only zeros. > I have written some characters into the DMA Memory Area (with a Hardware Debugger) when the driver is started, but aplay is not started. After I start aplay, all my characters are overwritten with Zero. Which function in ALSA is responsible for filling the DMA Buffer ? > - after the complete buffer is transmitted (but not the complete > file), I receive an underrun from ALSA > > - I never detect a mmap function call. > > Thanks, Klaus ------------------------------------------------------- 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