adc_soc_continuous_dma 里程疑问

#define RESULTS_BUFFER_SIZE 1024 // Buffer for storing conversion results
// (size must be multiple of 16)

#pragma DATA_SECTION(adcData0, "ramgs0");
#pragma DATA_SECTION(adcData1, "ramgs0");
Uint16 adcData0[RESULTS_BUFFER_SIZE];
Uint16 adcData1[RESULTS_BUFFER_SIZE];

DMAInitialize();

//
// DMA set up for first ADC
//
DMACH1AddrConfig(adcData0, &AdcaResultRegs.ADCRESULT0);

//
// Perform enough 16-word bursts to fill the results buffer. Data will be
// transferred 32 bits at a time hence the address steps below.
//
// Enable the DMA channel 1 interrupt
//
DMACH1BurstConfig(15, 2, 2);
DMACH1TransferConfig((RESULTS_BUFFER_SIZE >> 4) - 1, -14, 2);
DMACH1ModeConfig(
DMA_ADCAINT2,
PERINT_ENABLE,
ONESHOT_DISABLE,
CONT_DISABLE,
SYNC_DISABLE,
SYNC_SRC,
OVRFLOW_DISABLE,
THIRTYTWO_BIT,
CHINT_END,
CHINT_ENABLE
);

上例中的DMACH1TransferConfig((RESULTS_BUFFER_SIZE >> 4) - 1, -14, 2);几个参数如何理解？