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/ |
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AW: Re: Simulate External devices on vdsp
Started by ●June 5, 2003
Reply by ●June 6, 20032003-06-06
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/ > __________________________________ |