DMA transfer issue (Referring PDK sample - PING PONG Global region)

Mohamed Sohal

Dear All,
I'm working with C6678 using CCS v5.1.1...

I'm trying to do a basic copy using EDMA.

I'm referring to edma sample given with PDK Package. (C:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages\ti\csl\example\).

I have a text file (say 1.txt) which contains a text "1". This file is read and stored in srcBuf. I want to copy the content to another buffer destBuf via dma.
what modifications should I do in PARAM set given in "edmaedma_ping_pong_xfer_gbl_region". My PARAM set config is given below:

myParamSetup.option = CSL_EDMA3_OPT_MAKE(CSL_EDMA3_ITCCH_DIS, \
  CSL_EDMA3_TCCH_DIS, \
  CSL_EDMA3_ITCINT_DIS, \
  CSL_EDMA3_TCINT_EN, \
  1, CSL_EDMA3_TCC_NORMAL,\
  CSL_EDMA3_FIFOWIDTH_NONE, \
  CSL_EDMA3_STATIC_EN, \
  CSL_EDMA3_SYNC_A, \
  CSL_EDMA3_ADDRMODE_INCR, \
  CSL_EDMA3_ADDRMODE_INCR );

myParamSetup.srcAddr = (Uint32)srcBuf;
myParamSetup.aCntbCnt = CSL_EDMA3_CNT_MAKE(256,1);
myParamSetup.dstAddr = (Uint32)destBuf;
myParamSetup.srcDstBidx = CSL_EDMA3_BIDX_MAKE(1,1);
myParamSetup.linkBcntrld= CSL_EDMA3_LINKBCNTRLD_MAKE(CSL_EDMA3_LINK_NULL,0);
myParamSetup.srcDstCidx = CSL_EDMA3_CIDX_MAKE(0,1);
myParamSetup.cCnt = 1;

I'm following the ping pong example. Poll on IPR bit 0 is not happening with this PARAM config.
what's wrong here..
Please help.

Regards,

Sohal

over 12 years ago

0 Chad Courtney over 12 years ago

TI__Mastermind 30825 points

At just a glance that looks fine.

Can you provide the PaRAM values that got programmed in the PaRAM registers after the EDMA is configured.

Also run to execute this and verify that the data did land in the destination buffer (i.e. verify that the transfer got triggered in the first place.) If the transfer hasn't occured, go ahead and grabe the PaRAM register values again at this point and post them.

Best Regards,

Chad

0 Mohamed Sohal over 12 years ago in reply to Chad Courtney

Expert 1170 points

Hi Chad,

Thanks for the reply.

After configuring EDMA (before PARAM set) the PARAm Values are:

After PARAM set and after triggering the values dont change and after triggering the transferring has'nt occurred. PARAM values at this point are:

Regards,

Sohal

0 Chad Courtney over 12 years ago in reply to Mohamed Sohal

TI__Mastermind 30825 points

Can you open a memory window and display what's at the PaRAM entry you've done. This is the struct that's setting it up and is in Local L2 memory space, not the PaRAM memories. Also, I want to see this in Hexadecimal format so I can read it correctly.

Best Regards,

Chad

0 Mohamed Sohal over 12 years ago in reply to Chad Courtney

Expert 1170 points

Hi Chad,

I hope this is what you were looking for. before setting up PARAM all values here are "0".

Regards,

Sohal

0 Chad Courtney over 12 years ago in reply to Mohamed Sohal

TI__Mastermind 30825 points

That looks fine. Have you verified that the data is transfered. It looks like SRC is in Core0's L2 and DST is in Core1's L2 space?

Are you looking at the IPR of the Shadow regions or the Global Regions IPR. Can you do memory dumps of the channel registers before the transfer and after the transfer?

Best Regards,

Chad

0 Mohamed Sohal over 12 years ago in reply to Chad Courtney

Expert 1170 points

Hi Chad,

The data is not getting transferred. I have verified that. I'm wokring on function edma_ping_pong_xfer_gbl_region. Checking on Global Regions IPR I guess.

I was successful in transferring a srcbuf[256] to a destbuf[256] as in ping pong sample in one direction (ie; without pong). PARAM setting is already done for the same in the sample. Now i want move a file of different size. I think I have to modify the PARAM parameters accordingly. But am not able do the same.

Regards,

Sohal

0 Chad Courtney over 12 years ago in reply to Mohamed Sohal

TI__Mastermind 30825 points

Sohal,

If that's not transferring it at all, then it sounds like you're not triggering the transfer to occur. Again, I'll ask for a dump of the channel registers before and after you attempt to transfer so I can see what events are being set and see if you're unintentionally trying to trigger the wrong transfer.

Best Regards,

Chad

0 Mohamed Sohal over 12 years ago in reply to Chad Courtney

Expert 1170 points

Hi Chad,

The memory browser values of the channel registers before triggering

and after polling on IPR bit 2

Regards,

Sohal

0 Chad Courtney over 12 years ago in reply to Mohamed Sohal

TI__Mastermind 30825 points

The IPR for the EDMA Channel you are using was set - 0x02701068 = 0x00000002.

EDIT: I read back through this, and you believe you're using Channel 0, you're not, you've got it configured to use Channel 1.

Best Regards,

Chad

0 Mohamed Sohal over 12 years ago in reply to Chad Courtney

Expert 1170 points

Thanks Chad,

how to configure it for Channel 0?

Regards,

Sohal

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DMA transfer issue (Referring PDK sample - PING PONG Global region)