Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 649

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DMA Slave Transfers

To configure the SPI port for slave mode DMA transfers:

1. Define DMA receive (or transmit) transfer parameters by writing

2. Write to the

, bit 0). And configure the following:

• A receive access (

• A transmit access (

Chained DMA Transfers

The sequence for setting up and starting a chained DMA is outlined in the

following steps.

1. Clear the chain pointer register.

2. Configure the TCB associated with each DMA in the chain except

for the first DMA in the chain.

3. Write the first three parameters for the initial DMA to the

4. Configure the DMA settings for the entire sequence, enabling

DMA and DMA chaining in the

5. Begin the DMA by writing the address of a TCB (describing the

second DMA in the chain) to the

Stopping SPI Transfers

External transfer completion is indicated by the SPI status bit

core-driven transfers it shows that the read transfer (

ADSP-214xx SHARC Processor Hardware Reference

www.BDTIC.com/ADI

= 01) has been completed on the external interface. For

Serial Peripheral Interface Ports

registers directly.

= 00) or write

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