User`s guide

Targ et Preferences

Destination

The following parameters conﬁgure the D MA channel

outputs.

• Begin address

Set the starting address for the current destination

address pointer. The DMA module points to this address

at the beginning of a transfer and returns to it as speciﬁed

by the DST w rap parameter.

This parameter corresponds to bits 21-0 (BEG ADDR) in

the Active Destination Begin Register (DST_BEG_A DDR).

Note When you select Use DMA (with C28x3x) the

C280x/C28x3x ADC block, the value of the destination

Begin address (dstAdd) is the ADC buffer address

(ADCbufadr) minus the Number of conversions (NoC)

in the ADC block. In other w ords, d stAdd = AD Cbufadr

–NoC.

— If the target is F28232 or F28332, ADCbufadr = 57340

(0xDFFC)

— Otherwise, ADCbufadr = 65532 (0xFFFC)

For example, when you enable Use DMA (with

C28x3x) for a F28232 target, the DMA module sets the

destination Begin address to 0xDFF9 (57337) because

the ADCbufadr 57340 (0xDFFC) minus 3 conversions

equals 57337 (0xDFF9).

• Burst step

Set the number of 16-bit words by which to increment or

decrement the current address pointer before the nex t

burst. Enter a value from –4096 (decrement) to 4095

(increment).

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