AM335x EDMA destination address doesn't increment

I’m using EDMA to read the McSPI RX register and store in a global memory buffer and it works fine. To avoid initializing the ParamSet every transfer, I then set EDMA3CC_OPT_STATIC in the “opt” parameter and now the destination address no longer increments. I can determine this because only the first byte in the destination buffer gets updated and the value stored is the last byte received. This test transfer is very small (3 bytes) to make it easy to see on a scope/analyzer. What is going on?

EDMA3CCPaRAMEntry mSpiRxParamSet

static void InitSpiRxParamSet(uint32_t length)

{

   uint32_t opt;

   // Source is SPI Rx FIFO

   mSpiRxParamSet.srcAddr = (uint32_t)MCSPI_RX0_REG;

   // Destination is Rx buffer

   mSpiRxParamSet.destAddr = (uint32_t)gSpiMasterRxBuf;

   mSpiRxParamSet.aCnt = 1;   // 1 byte per event

   mSpiRxParamSet.bCnt = length;  // bCnt * cCnt = Total bytes

   mSpiRxParamSet.cCnt = 1;

   // Source is register so don't increment

   mSpiRxParamSet.srcBIdx = 0;

   mSpiRxParamSet.srcCIdx = 0;

   // Destination is memory so increment

   mSpiRxParamSet.destBIdx = 1;

   mSpiRxParamSet.destCIdx = 0;

   mSpiRxParamSet.linkAddr = 0xFFFF;    // No link

   mSpiRxParamSet.rsvd = 0;

   mSpiRxParamSet.bCntReload = 0;

   opt = 0;  // "A-synchronized" transfer (requires multiple “B” events)

   opt |= (EDMA3CC_OPT_STATIC);  // Causes destination to not increment

   // Flag to set in IPR/IPRH when transfer completes

   opt |= (EDMA_SPI_RX_CHAN << EDMA3CC_OPT_TCC_SHIFT);

   // Set IPR/IPRH only when entire transfer completes

   opt |= (1 << EDMA3CC_OPT_TCINTEN_SHIFT);

   mSpiRxParamSet.opt = opt;

   // Write ParamSet

   EDMA3SetPaRAM(SOC_EDMA30CC_0_REGS, EDMA_SPI_RX_CHAN, &mSpiRxParamSet);

   // Enable EDMA

   EDMA3EnableTransfer(SOC_EDMA30CC_0_REGS, EDMA_SPI_RX_CHAN, EDMA3_TRIG_MODE_EVENT);

}