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Hi all, I am trying to play audio through the aic23 on the dm642 using edma. But how do i get the mcasp to generate the edma event as the aic23 is connected through the mcasp0. Thanks in advance, Sunil |
help: using edma with aic23 on dm642
Started by ●March 22, 2005
Reply by ●March 22, 20052005-03-22
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Namaste Sunil, Since I havent done what you want to do, I cannot tell you exactly. Just some points I came across when configuring EDMA links for the VP on the DM642 (all things you might already know...): You have to configure an EDMA channel to copy the data for you. To do this, you call EDMA_open and EDMA_configArgs (see spru401). At the EDMA_open you have to specify which channel (and therefor which EDMA event source) should be linked to the channel. For my VP, I specify EDMA_CHA_VP0EVTYB for example to get an event triggered whenever VideoPort0 receives a fifo overrun of Y... EDMA_enableChannel() is required to enable the channel. You can also link a InterruptServiceRoutine using EDMA_intEnable(), IRQ_map(IRQ_EVT_EDMAINT, 8); IRQ_enable(IRQ_EVT_EDMAINT); Maybe the enableChannel is missing in your case. Are you sure that McAsp can trigger EDMA events? I have just searched very quickly through the sprs200 and I didnt find and EDMA within the McAsp chapter... best regards, thomas > > > Hi all, > I am trying to play audio through the aic23 on the dm642 using edma. But > how do i get the mcasp to generate the edma event as the aic23 is connected > through the mcasp0. > > Thanks in advance, > Sunil > > -- "Happy ProMail" bis 24. Mz: http://www.gmx.net/de/go/promail Zum 6. Geburtstag gibt's GMX ProMail jetzt 66 Tage kostenlos! |
