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Hi, yes, this is possible. Take care of automatic 64Bit copy and cache coherency issues! writeback cacheable source memory and invalidate destination memory before starting the transfer! see spru234.pdf for details bye, Thomas > > Hello All > > Is it possible to do the EDMA or QDMA between, SDRAM to SDRAM, > i.e. with SRC and DST address in SDRAM???? "specifically in DM642". > > Rgds > Harsha -- SMS bei wichtigen e-mails und Ihre Gedanken sind frei ... Alle Infos zur SMS-Benachrichtigung: http://www.gmx.net/de/go/sms |
Optimisation of Loops
Started by ●March 6, 2005
Reply by ●March 15, 20052005-03-15
Reply by ●March 16, 20052005-03-16
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That is clearly the source of the problem, but removing floating-point calls is not the only issue. Division on the C64 is also a function call, so you will not get pipelining if there is any division left in your arithmetic (unless it is a shift-right – division by a power of 2). The same goes for all C math functions – though some (such as abs) have a corresponding intrinsic inline function (such as _abs) which has ALMOST the same behaviour.
Roger Kingsley
> Message: 7 > Date: Tue, 15 Mar 2005 08:47:42 -0500 > From: P...@gmx.de > Subject: Re: Re: Optimisation of Loops > > > Hi, > > you are right. I'm doing some floating point calculations on a 6416, so I think the floating > point arithmetics are implemented in the RTS. It seems like that there is no way to pipeline > this loop except rewriting it with fixed point arithmetics? > > D. Puchowski |
Reply by ●March 18, 20052005-03-18
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Hello How can i display the 4.2.0 format in DM642 platform, will video port support this??? Regards Harsha |
Reply by ●March 18, 20052005-03-18
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No video port only supports 4:2:2, so you will have to convert 4:2:0 to 4:2:2. Regds JS > Harsha H M wrote: > > Hello > > How can i display the 4.2.0 format in DM642 platform, will video port > support this??? > > Regards > Harsha > |
Reply by ●March 21, 20052005-03-21
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Dear Harsha and Others, The following are good pointers to get an idea of the DM642 Video Port and the FVID API. 1. spru629c.pdf " TMS320C64x DSP Video Port/VCXO Interpolated Control (VIC) Port Reference Guide " 2. spra918a.pdf: "The TMS320DM642 Video Port Mini-Driver" Hope this helps. Cheers, Ganesh ----- Original Message ----- From: Harsha H M To: Sent: Friday, March 18, 2005 2:40 PM Subject: [c6x] Display DM642 Hello How can i display the 4.2.0 format in DM642 platform, will video port support this??? Regards Harsha |
