Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 646

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Programming Model

Then the program can change the SPI configuration. In this case, the slave

is always selected. Data corruption can be avoided by enabling the slave

only after configuring both the master and slave devices.

Master Mode Transfers

For core or DMA transfers, when the SPI is configured as a master, the

ports should be configured and transfers started using the following steps:

1. Route all required signals (

including the

2. Before enabling the SPI port, programs should specify which of

the slave-select signals (DPI pins) to use, setting one or more of the

required SPI flag select bits (

DMA operation set

controlled by the SPI port. (When

0 setting has automated control as with previous SHARC

4. Write to the

device as a master. Configure the

ing the appropriate word length, transfer format, baud rate, and

other necessary information.

The next steps are dependant on whether the access is a core or a DMA

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as slave select outputs.

bit to 1, to ensure the slave-selects are automatically

ADSP-214xx SHARC Processor Hardware Reference

) for master mode

= 0, only the

bit to enable the

registers, and configur-

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