SPI Communication With Daisy Seed? Clock Problem?

[bighitbiker3]

Forgive me, but I am very very new to this. I am trying to get my Teensy and Daisy to communicate with Teensy and Daisyduino.

Daisy is the slave, Teensy master.

The problem I am having, is I am unable to get the Teensy to read the response from the slave. I can read the messages on the Daisy coming from the teensy, but when I try to respond with

if (digitalRead(SPI_CS_PIN) == LOW) {
    // RESPONDING HERE
    byte received = SPI.transfer(0x42);
    receivedValue = received;
    newData = true;
  }

The return value of the Teensy's `transfer` is always 255.

My suspicion, thanks to AI, is that it's a clock issue because I am able to get it to work with manual bit-banging. I am at a loss at how to further debug that though.

Any ideas/things to look for?

 

[MarkT]

Which SPI modes are you using at each end?

 

[bighitbiker3]

Which SPI modes are you using at each end?

Mode0. I've tried all 4 of them though.