Arduino as SPI slave?

Using Arduino Networking, Protocols, and Devices
9

CrossRoads:
No no no!
You've got faster hardware in the '328 doing the monitoring - just need to figure out how to use it.

I'll look at the links in a minute, but I note from the datasheet pages you quoted:

   ; Enable SPI, Master, set clock rate fck/16 
   ldi r17,(1<<SPE)|(1<<MSTR)|(1<<SPR0)
   out SPCR,r17

It's interesting, isn't it, that in their own example code they slow down the clock to fck/16?

In my code example I had this:

 // Slow down the master a bit
  SPI.setClockDivider(SPI_CLOCK_DIV8);

I got away with slowing the master down to 1/8 clock, they showed 1/16 in the example code.