Hello again, Our loader reads a COFF output from the DSP compiler and downloads into DDR from 0x88000000. In theory it could load into L1 and L2 regions (0x11800000 etc.) but I havn't tried this. The DSP code starts with a simple initialisation sequence (setting up stack, cache etc.) before calling the main C code.
Cheers Rudy > -----Original Message----- > From: qi huafei [mailto:[EMAIL PROTECTED] > Sent: 20 December 2006 03:26 > To: [email protected] > Cc: Rudy Reinsch > Subject: RE:RE: how to make use of performanceof the davinci's dsp > > Dear Dudy, > Thanks for your suggestion. > I have another question.Can your loader load the dsp > executeable to the dsp's private L1 or L2? Is it necessary to > load some section of dsp's executeable to the L1 or L2? > It seems that the loader in dsplink can't loader the dsp > executeable to the dsp's private memory space. > Best regars, > Qi Huafei > > > > >Hello, > >We use our own loader to upload code and start the DSP. > >The code ran but it was very slow - The problem was that The Caches > >(L1D L1P L2) were not enabled. Maybe this could be your problem? > > > >Cheers > >Rudy. > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED] > >] On Behalf Of qi huafei > > > Sent: 18 December 2006 08:58 > > > To: [email protected] > > > Subject: how to make use of the performance of davinci's dsp > > > > > > hi, > > > I use some dsplink APIs to load the dsp executeable file and > > > start executing on dsp. > > > The problem is that the program running on the dsp side is too > > > slow,but the same program runs much more faster on the > DM642.It can > > > decode 24 frames per second on the DM642,but only about 1 > frame per > > > second on the davinci. > > > I don't know how could that happen.Anybody can help me? > > > Thanks! > > _________________________________________________________________ > 享用世界上最大的电子邮件系统— MSN Hotmail。 http://www.hotmail.com > >
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