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hi, I was planning to use IDMA method in order to establish communication between ADSP-2188 and a host processor. At the same time my friend suggested that, using Dual-port RAM could be an alternative for communication between Host and ADSP. I would like to know what are the advantages and disadvantages of using the Dual-Port RAM method in my system Design. Looking forward to your replies......... bye __________________________________________________ |
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Using Dual-Port RAM
Started by ●June 11, 2001
Reply by ●June 11, 20012001-06-11
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IDMA *is* dual-port ram. Note that when the host accesses the IDMA, the dsp will skip a few cycles, possibly affecting any time-critical things. The other way is to use a hardware fifo between the dsp and host. rashmi ranjana wrote: > > hi, > > I was planning to use IDMA method in order to > establish communication between ADSP-2188 and a host > processor. At the same time my friend suggested that, > using Dual-port RAM could be an alternative for > communication > between Host and ADSP. > I would like to know what are the advantages and > disadvantages > of using the Dual-Port RAM method in my system Design. > > Looking forward to your replies......... > > bye > -- ___ ___ / /\ / /\ / /__\ / /\/\ /__/ / Russell Shaw, B.Eng, M.Eng(Research) /__/\/\/ \ \ / Victoria, Australia, Down-Under \ \/\/ \__\/ \__\/ |
Reply by ●June 11, 20012001-06-11
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If you use dual port ram you still have the cost of adding external boot memory. Using IDMA allows one to boot from host, in that the host loads the PM & DM in the dsp eliminating the need for an external flash or eprom to boot the dsp. Using this method, a part of the dsp's memory space can be set aside and used as a sort of shared memory. The down side to using the IDMA is that it limits your external memory space to just eight locations (two addresses per chip select) rashmi ranjana <> on 06/10/2001 21:50:06 To: cc: (bcc: Chuck Petras/SEL) Subject: [adsp] Using Dual-Port RAM hi, I was planning to use IDMA method in order to establish communication between ADSP-2188 and a host processor. At the same time my friend suggested that, using Dual-port RAM could be an alternative for communication between Host and ADSP. I would like to know what are the advantages and disadvantages of using the Dual-Port RAM method in my system Design. Looking forward to your replies......... bye __________________________________________________ _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to To Post: Send an email to To Leave: Send an email to Archives: http://groups.yahoo.com/group/adsp Other Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
