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Hi I had found this DMA index register problem only on the VDSP simulation environment. I had done the chained SPORT DMA in our board. it is working perfectly without any offsetting. regards ajith --- "Burgwedel, Friedrich" <> wrote: > Very interesting... this same subtraction of 0x8000 > is necessary for the > real hardware when setting up chained DMA for SPORT; > I don't know if it is > necessary for all chained DMA. It seems that the > developers of the simulator > mixed something up... > > Friedrich > > -----Ursprgliche Nachricht----- > Von: ajith_pc [mailto:] > Gesendet: Donnerstag, 5. Juni 2003 15:31 > An: > Betreff: [adsp] Re: Simulate External devices on > vdsp > Hi > I think it is possible to simulate the external > port DMA in VDSP > environment. This error seems that the external DMA > address u had > written at the external index register of the DMA > channel (EIEPx- > 21065L processor) is not a valid one. Check the > available external > memory space for the respective processor. I had > experienced an > anomaly when simulating serial port DMA on 21065L > processor by VDSP > release 2.0. The internal data buffer address for > the DMA index > register should be subtracted by 0x8000 for getting > correct output at > the destination (this subtraction is needed only for > simulation > purpose). The same was found on the external port > DMA simulation also > (no need of this subtraction for the external index > register data).U > pls go through the message number 1468, the same > simulation is > discussed in those series (using SPORT). > regards > ajith > > --- In , sanjana sharma > <sanjana0706@y...> wrote: > > Hi all > > Is it possible to simulate external devices like > dac on the VDSP > environment.I am trying to dma out the buffer data > > out from the external buffer in master mode and > run on the > simulator ,it gives the error"*** Invalid external > address for > external port DMA ***". > > Plz suggest..... > > Regards > > sanjana > > _____________________________________ > 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/ > __________________________________ |