SPI Master is connected to the slaves with common MISO, MOSI, and CLK lines, with individualized lines for the selection signals. So, slaves share the MISO, MOSI, and CLK lines.
I want to broadcast from master to slaves. If I select all slaves at the same time, they will receive the same data.
Now, suppose that slaves only send 1s to the master if they received an "accepted" word (e.g. some parity mechanism in the encoding) as the last word (not the current word). Otherwise, Slaves transmit 0s through the MISO line. I'm not interested in other data, only in the parity. So, SPI master transmits word N, while slaves transmit the parity of word N-1.
Would it be possible for the master to identify if any slave failed to receive the transmitted word meaning it receives a 0 through the MISO lines? My guess it is that it should work, but not sure.