SPI Configuration Guidence

Hi,

I've been trying to plan how to configure my spi interface on the omapl137 to control a SPI ADC. Before I get into the details, I have some general high level questions about the SPI module.

What initiates a read? Do I need to write a dummy value to SPIDAT1?

If I need to toggle a CNV pin every 1.66 us what approach would you suggest?

I'm using SYSBIOS and this is intended for the DSP side of the omap.

Regards