Jowelle,
One suggestion for your application is: You can use DSP/BIOS LINK for your application scenario. 1) Application can configure the shared memory using Link. 2) Application on GPP side can use PROC_write API to store unprocessed buffer at pre-defined memory location. 3) The MSGQ protocol can be used for sending commands to start processing on the DSP. 4) The application on DSP side can then use the PROC_read protocol to read the data. 5) DSP can use MSGQ protocol to send the results back to GPP. You can have a look at the documentation in the $DSPLINK/doc folder. Also, you can have a look at the reference sample code for message sample and readwrite sample in $DSPLINK/[gpp|dsp}/src/samples. This will be a good starting point on how to use LINK in your custom app. Regards, Deepali ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ring, Chris Sent: Tuesday, July 10, 2007 9:55 PM To: Vasiliy Titskiy; davinci-linux-open-source@linux.davincidsp.com Subject: RE: [SPAM] - DSP and GPP shared memory - Bayesian Filterdetectedspam Also, cache management is often important to consider when going across processor boundaries (and even across component ownership of buffers!). Just posted this to try to capture many of the cache issues: http://wiki.davincidsp.com/index.php?title=Cache_Management Feel free to correct errors (I did my best... but cache management is quite tricky). ;) If you want to discuss details, I might suggest doing it on the "discussion" tab of the topic above so we capture the chat. Chris ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vasiliy Titskiy Sent: Tuesday, July 10, 2007 9:02 AM To: davinci-linux-open-source@linux.davincidsp.com Subject: RE: [SPAM] - DSP and GPP shared memory - Bayesian Filter detectedspam Hello, You can use CMEM driver for this task. And DSPLINK driver for sending/receiving messages to/from DSP. -- Vasily Titsky ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jowelle Pinlac Sent: Monday, July 09, 2007 10:41 PM To: davinci-linux-open-source@linux.davincidsp.com Subject: [SPAM] - DSP and GPP shared memory - Bayesian Filter detected spam Hi everyone. Does anyone in here able to use shared memory on the GPP and DSP ? We're planning to implement a common memory area where the GPP will store the unprocessed buffer (GPP will then send message to DSP to start processing the raw data), the DSP will then access this area for processing then send the result information back to the GPP. Any information or reference on how I can accomplish this shared memory area approach. Would it be possible if I define a static area(address) on GPP and DSP side where to store and read the unprocessed buffer ? Any information on this matter is highly appreciated. Regards, Jowelle
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