I'm using host processor to boot ADSP-21478. I have a problem because i need to add delays between sent words to boot DSP correctly. I would like to use MISO pin for handshake, but the state of this pin remains unchanged (pullup and pulldown resistors on the line didnt help).
Im sure SPI interface works correcltly, because after booting with delays i have communication between processors.
How exactly MISO pin works in handshake? In documentation it is said DSP sends zeros or ones. What does it mean?