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TMS320C6746: PaRAM settings for using McBSP0

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Part Number:TMS320C6746

Hello.

I want transfer data through McBSP0 using EDMA0

To start transmission I fill PaRAM entries:

ParamSet[2] (McBSP0 Receive):

OPT = (1 << 20) | (0x02 << 12);  // TCC = 2

SRC = 0x01F10000; // BFIFO

LINK = 0xFFFF;

ParamSet[3] (McBSP0 Transmit):

OPT = (1 << 20) | (0x03 << 12);  // TCC = 3

DST = 0x01F10000; // BFIFO

LINK = 0xFFFF;

Then I enable DMA events and DMA interrupts:

EDMA3CC_IESR = (1 << 2) | (1 << 3);

EDMA3CC_EESR = (1 << 2) | (1 << 3);

And start McBSP0:

    MCBSP_SPCR |= (1 << 22);  // GRST
    MCBSP_SPCR |= (1 << 16) | (1 << 0);  // XRST, RRST
    MCBSP_SPCR |= (1 << 23);  // FRST

I expext two consecutive interrupts (Tx and Rx), but get only 1 - Tx (IPR = 0x08). Furthemore I also get DMA Error Interrupt with EMR = 0x08;

If I use wrong order of PaRAM entries (2 for Tx and 3 for Rx) then I get both interrupts (IPR = 0x04 first and IPR = 0x08 second) but after it I also get DMA Error with EMR = 0x04;

What I'm doing wrong?

Can I find code samples for this peripheral anywhere?

 


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