Workflow

1.
Define the variables needed, in order to perform a data transfer:
```
uint32_t i;
uint32_t cfg;
dma_transfer_descriptor_t desc;
```

Prepare the data buffer to be transferred:

for (i = 0; i < DMA_BUF_SIZE; i++) {
    g_dma_buf[0][i] = i;
    g_dma_buf[1][i] = 0;
}

3.
Initialize the DMAC module:
```
dmac_init(DMAC);
```

Set the priority to round-robin:

dmac_set_priority_mode(DMAC, DMAC_PRIORITY_ROUND_ROBIN);

5.
Enable the DMAC module:
```
dmac_enable(DMAC);
```

Configure the channel for:

Enable stop on done
Enable AHB protection

Set the FIFO so that largest defined length AHB burst is performed

cfg = DMAC_CFG_SOD_ENABLE |        
        DMAC_CFG_AHB_PROT(1) |     
        DMAC_CFG_FIFOCFG_ALAP_CFG; 
dmac_channel_set_configuration(DMAC, DMA_CH, cfg);